Java fast track training

Java fast track training

RVH Technologies provides Java fast track training in live, real-time and interactive. Java selfpaced/ online training videos
for very affordable price/cost/fees with high quality.

Java fast track training for a very affordable cost from any where in the world.

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Find the course content :

http://www.rvhtech.com

Please click here for Register for Java fast track training .Hurry Up limited seats available.

MSBI fast track training

MSBI fast track training : 

RVH Technologies provides MSBI fast track training in live, real-time and interactive. MSBI selfpaced/ online training videos
for very affordable price/cost/fees with high quality.

MSBI fast track training for a very affordable cost from any where in the world.

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Find the course content :

www.rvhtech.com/MSBI.html

Please click here for Register for MSBI fast track training .Hurry Up limited seats available.

Teradata fast track training

Teradata fast track training:

RVH Technologies provides Teradata fast track training in live, real-time and interactive. Teradata selfpaced/ online training videos
for very affordable price/cost/fees with high quality.

Teradata fast track training for a very affordable cost from any where in the world.

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Find the course content :

www.rvhtech.com/Teradata.html

Please click here for Register for Teradata fast track training .Hurry Up limited seats available.

SAP ABAP fast track training

SAP ABAP fast track training:

RVH Technologies provides SAP ABAP fast track training in live, real-time and interactive. SAP ABAP selfpaced/ online training videos
for very affordable price/cost/fees with high quality.

SAP ABAP fast track training for a very affordable cost from any where in the world.

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Find the course content :

http://www.rvhtech.com

Please click here for Register for SAP ABAP fast track training .Hurry Up limited seats available.

Business Analyst fast track training

Business Analyst fast track training :

RVH Technologies provides Business Analyst fast track training in live, real-time and interactive. Business Analyst selfpaced/ online training videos
for very affordable price/cost/fees with high quality.

Business Analyst fast track training for a very affordable cost from any where in the world.

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Find the course content :

http://www.rvhtech.com

Please click here for Register for Business Analyst fast track training .Hurry Up limited seats available.

 

SAP BI fast track training

SAP BI fast track training

RVH Technologies provides SAP BI fast track training in live, real-time and interactive. SAP BI selfpaced/ online training videos
for very affordable price/cost/fees with high quality.

SAP BI fast track training for a very affordable cost from any where in the world.

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Find the course content :

http://www.rvhtech.com

Please click here for Register for SAP BI fast track training .Hurry Up limited seats available.

Informatica fast track training

Informatica fast track training

RVH Technologies provides Informatica fast track training in live, real-time and interactive. Informatica selfpaced/ online training videos
for very affordable price/cost/fees with high quality.

Informatica fast track training for a very affordable cost from any where in the world.

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Find the course content :

http://www.rvhtech.com

Please click here for Register for Informatica fast track training .Hurry Up limited seats available.

Sharepoint fast track training

Sharepoint fast track training

RVH Technologies provides Sharepoint fast track training in live, real-time and interactive. Sharepoint selfpaced/ online training videos
for very affordable price/cost/fees with high quality.

Sharepoint fast track training for a very affordable cost from any where in the world.

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Find the course content :

www.rvhtech.com

Please click here for Register for Sharepoint fast track training .Hurry Up limited seats available.

Qlikview fast track training

Qlikview fast track training

RVH Technologies provides qlikview fast track training in live, real-time and interactive. qlikview selfpaced/ online training videos
for very affordable price/cost/fees with high quality.

qlikview fast track training for a very affordable cost from any where in the world.

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Find the course content :

http://www.rvhtech.com

Please click here for Register for qlikview fast track training .Hurry Up limited seats available.

cognos fast track training

cognos fast track training:

RVH Technologies provides cognos fast track training in live, real-time and interactive. cognos selfpaced/ online training videos for very affordable price/cost/fees with high quality.

cognos fast track training for a very affordable cost from any where in the world.

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Find the course content :

www.rvhtech.com

Please click here for Register for cognos fast track training .Hurry Up limited seats available.

Ab initio self paced online training videos

Ab initio self paced online training videos:

RVH Technologies provides Ab initio Online Training in live, real-time and interactive. Ab initio self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

Ab initio

Ab initio self paced online training (Ab initio video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for Ab initio online training videos

Oracle self paced online training videos

Oracle self paced online training videos

RVH Technologies provides Oracle Online Training in live, real-time and interactive. Oracle self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

oracle

Oracle self paced online training (Oracle video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for Oracle online training videos

SAP HANA self paced online training videos

SAP HANA self paced online training videos:

RVH Technologies provides SAP HANA Online Training in live, real-time and interactive. SAP HANA self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

sap hana

SAP HANA self paced online training (SAP HANA video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for SAP HANA online training videos

Datastage self paced online training videos

Datastage self paced online training videos:

RVH Technologies provides Datastage Online Training in live, real-time and interactive. Datastage self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

datastage

Datastage self paced online training (Datastage video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for Datastage online training videos

Qlikview self paced online training videos

Qlikview self paced online training videos:

RVH Technologies provides Qlikview Online Training in live, real-time and interactive. Qlikview self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

QVD

Qlikview self paced online training (Qlikview video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for Qlikview online training videos

CCNA self paced online training videos

CCNA self paced online training videos:

RVH Technologies provides ccna Online Training in live, real-time and interactive. ccna self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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ccna self paced online training (ccna video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for ccna online training videos

Selenium self paced online training videos

Selenium self paced online training videos:

RVH Technologies provides selenium Online Training in live, real-time and interactive. selenium self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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selenium self paced online training (selenium video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for selenium online training videos

Manual testing self paced online training videos

Manual testing self paced online training videos:

RVH Technologies provides manual testing Online Training in live, real-time and interactive. manual testing self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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manual testing self paced online training (manual testing video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for manual testing online training videos

QTP self paced online training videos

QTP self paced online training videos:

RVH Technologies provides qtp Online Training in live, real-time and interactive. qtp self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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qtp self paced online training (qtp video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for qtp online training videos

Sql server dba self paced online training videos

SQL Server dba self paced online training videos:

RVH Technologies provides sql server dba Online Training in live, real-time and interactive. sql server dba self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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sql server dba self paced online training (sql server dba video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for sql server dba online training videos

ASP dot net self paced online training videos

ASP dot net self paced online training videos:

RVH Technologies provides asp dot net Online Training in live, real-time and interactive. asp dot net self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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asp dot net self paced online training (asp dot net video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for asp dot net online training videos

Devops self paced online training videos

Devops self paced online training videos:

RVH Technologies provides devops Online Training in live, real-time and interactive. devops self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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devops self paced online training (devops video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for devops online training videos

Salesforce self paced online training videos

Salesforce  self paced online training videos:

RVH Technologies provides salesforce Online Training in live, real-time and interactive. salesforce self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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salesforce self paced online training (salesforce video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for salesforce online training videos

Big data self paced online training videos

 

Big data self paced online training videos:

RVH Technologies provides big data Online Training in live, real-time and interactive. big data self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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big data self paced online training (big data video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for big data online training videos

Cognos TM1 self paced online training videos

Cognos TM1 self paced online training videos:

RVH Technologies provides cognos tm1 Online Training in live, real-time and interactive. cognos tm1 self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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cognos tm1 self paced online training (cognos tm1 video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for cognos tm1 online training videos

SAP FICO self paced online training videos

SAP FICO self paced online training videos:

RVH Technologies provides sap fico Online Training in live, real-time and interactive. sap fico self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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sap fico self paced online training (sap fico video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for sap fico online training videos

SAP BO self paced online training videos

SAP BO self paced online training videos:

RVH Technologies provides sap bo Online Training in live, real-time and interactive. sap bo self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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sap bo self paced online training (sap bo video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for sap bo online training videos

Oracle DBA self paced online training videos

Oracle DBA self paced online training videos:

RVH Technologies provides oracle dba Online Training in live, real-time and interactive.Oracle DBA self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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oracle dba self paced online training (oracle dba video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for oracle dba online training videos

OBIEE self paced online training videos

OBIEE self paced online training videos:

RVH Technologies provides obiee Online Training in live, real-time and interactive. OBIEE self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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obiee self paced online training (obiee video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for obiee online training videos

Microstrategy self paced online training videos

 Microstrategy self paced online training videos:

RVH Technologies provides microstrategy Online Training in live, real-time and interactive. Microstrategy self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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Microstrategy self paced online training (microstrategy video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for microstrategy online training videos

Java self paced online training videos

Java self paced online training videos:

RVH Technologies provides java Online Training in live, real-time and interactive. java self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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Java self paced online training (java video based online training) for very affordable fees with support.

Core Java Self Paced Recordings: 4000 INR

Advanced Java&J2EE Recordings:8000 INR

Complete Package :12000 INR

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for java online training videos

MSBI self paced online training videos

MSBI selfpaced online training videos:

RVH Technologies provides msbi Online Training in live, real-time and interactive. msbi self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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msbi self paced online training (msbi video based online training) for very affordable fees with support.

MSBI Self paced Recordings Fees:8000 INR (SSIS,SSRS,SSAS) (Complete Package)

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for msbi online training videos

Teradata self paced online training videos

Teradata self paced online training videos:

RVH Technologies provides teradata Online Training in live, real-time and interactive. teradata self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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Teradata self paced online training (teradata video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for teradata online training videos

SAP ABAP self paced online training videos

Sap ABAP self paced online training videos:

RVH Technologies provides sap abap Online Training in live, real-time and interactive. sap abap self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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sap abap self paced online training (sap abap video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for sap abap online training videos

Business Analyst self paced online training videos

Business Analyst self paced online training videos:

RVH Technologies provides business analyst Online Training in live, real-time and interactive. business analyst self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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Business analyst self paced online training (business analyst video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for business analyst online training videos

SAP BI self Paced online training videos

SAP BI self paced online training videos:

RVH Technologies provides sap bi Online Training in live, real-time and interactive. sap bi self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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SAP BI self paced online training (sap bi video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for sap bi online training videos

Sharepoint self paced online training videos

Sharepoint self paced online training videos:

RVH Technologies provides sharepoint  Online Training in live, real-time and interactive. sharepoint self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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Sharepoint self paced online training (sharepoint video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for sharepoint online training videos

Tableau self paced online training videos

Tableau self paced online training videos:

RVH Technologies provides tableau Online Training in live, real-time and interactive. tableau self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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Tableau self paced online training (tableau video based online training) for very affordable fees with support.

Tableau Recordings Fees: 10000 INR (copmplete Package).

Tableau Online training (Tableau Live Training/Tableau expert training) :22000 INR

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for tableau online training videos

informatica self paced online training videos

informatica self paced online training videos:

RVH Technologies provides informatica Online Training in live, real-time and interactive. informatica self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

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Informatica self paced online training (informatica video based online training) for very affordable fees with support.

If you select combo package (Two courses self paced training ),You will get 20% discount.

Please click here for Register for informatica online training videos

Cognos selfpaced online training videos

Cognos self paced online training videos:

RVH Technologies provides IBM Cognos 10 Online Training in live, real-time and interactive. Cognos self paced online training videos for very affordable price with high quality.

Online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced learning and online training courses.

Cognos selfpaced online training videos

Cognos self paced online training (Cognos video based online training) for very affordable fees with support.

Cognos self paced online training videos for only 10000 INR.

Cognos TM1 selfpaced online training videos for only 10000 INR.

If you select combo package 18000 INR for Cognos and TM1 online training videos (Combo package)  

Please click here for Register for Cognos online training videos:

 

Online training videos|Selfpaced training videos|Low cost online training

Online training Videos |Self-paced Online training:

RVH technologies is one of the best online training providers from india .For getting online training videos of any technology or self paced online training or Live online training one and only training provider from india for very affordable price .

Self-paced online training videos:(Video Based Online training) :

When it comes to up skilling yourself and developing your career, there are plenty of opportunities available to take up professional development and training courses. 

However, it’s also important to note that everyone has different learning styles and some types of training courses may be better suited to your own individual requirements than others. 

online live learning can be a great avenue for many people, but if you prefer to have great control over the pace of your own development and training, it’s worthwhile taking a closer look at the benefits of self-paced online training and online training courses.

Work at your own pace.

One of the biggest benefits of taking up a self-paced training course is that you can control the pace and you have the ability to direct your own learning within a specified framework.

This can be very useful for people who wouldn’t be able to commit to a regular classroom-based course, or for anyone who prefers flexibility in their learning system.

With self-paced learning, you can control how much time you spend on a particular unit or module within the course, rather than having to conform to a pace set by an external instructor or class structure.

 Cheaper fees:

Taking up Self paced e-learning course means that you get all the benefits of reduced costs and cheaper fees.We are providing all software online training videos for very affordable price.We also Extended training vedeos to all the technologies for less price .

An online learning environment is significantly cheaper than a traditional classroom-based course as you won’t have to contribute towards the costs of securing a physical classroom space.

Based on the user requests,we started weekend batches also for all the courses.

Please register for selfpaced online training here , Please go thorough all those recordings and Take the Decision.

Online training Videos Available (With Support ):

1) cognos online training videos

2) Cognos TM1 online training videos

3) MSBI online training videos

4) Obiee online training videos

5) Core and Advanced java online training videos

6) Qlikview online training videos

7) Informatica online training videos

8) Sap fico onine training videos

And all the Sap Modules online training videos available ….

Additional Features:


If you take two course videos ,You will get 25 % Discount on whole Price.

If you take 3 course ,30 % discount.

More than that 40 % Discount….Hurry UP

 

Aptitude questions and answers with explanation by experts

Top most important Aptitude interview questions and answers by Experts:

Here is a list of  Top most important Aptitude interview questions and answers by Experts.If you want to download aptitude interview questions pdf free ,you can register with RVH techguru. Our experts prepared these aptitude interview questions to accommodate freshers level to most experienced level technical interviews.

Java top Interview Questions and latestanswers by RVH Techguru experts

Top most important Java interview questions and answers by Experts:

Here is a list of Top most important Java interview questions and answers by Experts.If you want to download Java interview questions pdf free ,you can register with RVH techguru. Our experts prepared these Java interview questions to accommodate freshers level to most experienced level technical interviews.

If you want to become an expert in Java ,Register for Java online training here.

 

 

1) What is difference between JDK,JRE and JVM?
JVM
JVM is an acronym for Java Virtual Machine, it is an abstract machine which provides the runtime environment in which java bytecode can be executed. It is a specification.
JVMs are available for many hardware and software platforms (so JVM is platform dependent).
JRE
JRE stands for Java Runtime Environment. It is the implementation of JVM.
JDK
JDK is an acronym for Java Development Kit. It physically exists. It contains JRE + development tools.
2) How many types of memory areas are allocated by JVM?
Many types:
1. Class(Method) Area
2. Heap
3. Stack
4. Program Counter Register
5. Native Method Stack
3) What is JIT compiler?.
Just-In-Time(JIT) compiler:It is used to improve the performance. JIT compiles parts of the byte code that have similar functionality at the same time, and hence reduces the amount of time needed for compilation.Here the term “compiler” refers to a translator from the instruction set of a Java virtual machine (JVM) to the instruction set of a specific CPU.
4) What is platform?

A platform is basically the hardware or software environment in which a program runs. There are two types of platforms software-based and hardware-based. Java provides software-based platform.
5) What is the main difference between Java platform and other platforms?
The Java platform differs from most other platforms in the sense that it’s a software-based platform that runs on top of other hardware-based platforms. It has two components:
1. Runtime Environment
2. API(Application Programming Interface)
6) What gives Java its ‘write once and run anywhere’ nature?
The bytecode. Java is compiled to be a byte code which is the intermediate language between source code and machine code. This byte code is not platform specific and hence can be fed to any platform.
7) What is class loader?
The classloader is a subsystem of JVM that is used to load classes and interfaces.There are many types of classloaders e.g. Bootstrap classloader, Extension classloader, System classloader, Plugin classloader etc.
8) Is Empty .java file name a valid source file name?
Yes, save your java file by .java only, compile it by javac .java and run by java yourclassname Let’s take a simple example:
1. //save by .java only
2. class A{
3. public static void main(String args[]){
4. System.out.println(“Hello java”);
5. }
6. }
7. //compile by javac .java
8. //run by java A
compile it by javac .java
run it by java A
9) Is delete,next,main,exit or null keyword in java?
No.
10) If I don’t provide any arguments on the command line, then the String array of Main method will be empty or null?.
It is empty. But not null.
11) What if I write static public void instead of public static void?
Program compiles and runs properly.
12) What is the default value of the local variables?
The local variables are not initialized to any default value, neither primitives nor object references.
13) What is difference between object oriented programming language and object based programming language?
Object based programming languages follow all the features of OOPs except Inheritance. Examples of object based programming languages are JavaScript, VBScript etc.
14) What will be the initial value of an object reference which is defined as an instance variable?
The object references are all initialized to null in Java.
15) What is constructor?
• Constructor is just like a method that is used to initialize the state of an object. It is invoked at the time of object creation.
16) What is the purpose of default constructor?
• The default constructor provides the default values to the objects. The java compiler creates a default constructor only if there is no constructor in the class.

17) Does constructor return any value?
yes, that is current instance (You cannot use return type yet it returns a value)
18)Is constructor inherited?
No, constructor is not inherited.

19) Can you make a constructor final?
No, constructor can’t be final.
20) What is static variable?
• static variable is used to refer the common property of all objects (that is not unique for each object) e.g. company name of employees,college name of students etc.
• static variable gets memory only once in class area at the time of class loading.
21) What is static method?
• A static method belongs to the class rather than object of a class.
• A static method can be invoked without the need for creating an instance of a class.
• static method can access static data member and can change the value of it.

22) Why main method is static?
because object is not required to call static method if It were non-static method,jvm creats object first then call main() method that will lead to the problem of extra memory allocation 
23) What is static block?
• Is used to initialize the static data member.
• It is executed before main method at the time of classloading.
24) Can we execute a program without main() method?
Yes, one of the way is static block.
25) What if the static modifier is removed from the signature of the main method?
Program compiles. But at runtime throws an error “NoSuchMethodError”.

26) What is this in java?
It is a keyword that that refers to the current object.
27)What is Inheritance?
Inheritance is a mechanism in which one object acquires all the properties and behaviour of another object of another class. It represents IS-A relationship. It is used for Code Resusability and Method Overriding.
28) Which class is the super class for every class.
Object class.
29) Why multiple inheritance is not supported in java?
• To reduce the complexity and simplify the language, multiple inheritance is not supported in java in case of class.
30) What is composition?
Holding the reference of the other class within some other class is known as composition.
31) What is difference between aggregation and composition?
Aggregation represents weak relationship whereas composition represents strong relationship. For example: bike has an indicator (aggregation) but bike has an engine (compostion).
32) Why Java does not support pointers?
Pointer is a variable that refers to the memory address. They are not used in java because they are unsafe(unsecured) and complex to understand.
33) What is super in java?
It is a keyword that refers to the immediate parent class object.
34) Can you use this() and super() both in a constructor?
No. Because super() or this() must be the first statement.
35)What is object cloning?
The object cloning is used to create the exact copy of an object.
36) What is method overloading?
If a class have multiple methods by same name but different parameters, it is known as Method Overloading. It increases the readability of the program.
37) Why method overloading is not possible by changing the return type in java?
Because of ambiguity.
38) Can we overload main() method?
Yes, You can have many main() methods in a class by overloading the main method.
39) What is method overriding:
If a subclass provides a specific implementation of a method that is already provided by its parent class, it is known as Method Overriding. It is used for runtime polymorphism and to provide the specific implementation of the method.

40) Can we override static method?
No, you can’t override the static method because they are the part of class not object.
41) Why we cannot override static method?
It is because the static method is the part of class and it is bound with class whereas instance method is bound with object and static gets memory in class area and instance gets memory in heap.
42) Can we override the overloaded method?
Yes.
43) Difference between method Overloading and Overriding.

Method Overloading Method Overriding
1) Method overloading increases the readability of the program. Method overriding provides the specific implementation of the method that is already provided by its super class.
2) method overlaoding is occurs within the class. Method overriding occurs in two classes that have IS-A relationship.
3) In this case, parameter must be different. In this case, parameter must be same.
44) Can you have virtual functions in Java?
Yes, all functions in Java are virtual by default.
45) What is covariant return type?
Now, since java5, it is possible to override any method by changing the return type if the return type of the subclass overriding method is subclass type. It is known as covariant return type.
46) What is Runtime Polymorphism?
Runtime polymorphism or dynamic method dispatch is a process in which a call to an overridden method is resolved at runtime rather than at compile-time.
In this process, an overridden method is called through the reference variable of a super class. The determination of the method to be called is based on the object being referred to by the reference variable.

47) What is the difference between static binding and dynamic binding?
In case of static binding type of object is determined at compile time whereas in dynamic binding type of object is determined at runtime.
48) What is abstraction?
Abstraction is a process of hiding the implementation details and showing only functionality to the user.

49) What are the advantages of JdbcTemplate in spring?
Less code: By using the JdbcTemplate class, you don’t need to create connection,statement,start transaction,commit transaction and close connection to execute different queries. You can execute the query directly.

50) Multiple inheritance is not supported through class in java but it is possible by interface, why?
As we have explained in the inheritance chapter, multiple inheritance is not supported in case of class. But it is supported in case of interface because there is no ambiguity as implementation is provided by the implementation class. For example:
1. interface Printable{
2. void print();
3. }
4. interface Showable{
5. void print();
6. }
7.
8. class TestTnterface1 implements Printable,Showable{
9. public void print(){System.out.println(“Hello”);}
10. public static void main(String args[]){
11. TestTnterface1 obj = new TestTnterface1();
12. obj.print();
13. }
14. }
Test it Now
Hello
As you can see in the above example, Printable and Showable interface have same methods but its implementation is provided by class TestTnterface1, so there is no ambiguity.

Interface inheritance
A class implements interface but one interface extends another interface .
1. interface Printable{
2. void print();
3. }
4. interface Showable extends Printable{
5. void show();
6. }
7. class Testinterface2 implements Showable{
8.
9. public void print(){System.out.println(“Hello”);}
10. public void show(){System.out.println(“Welcome”);}
11.
12. public static void main(String args[]){
13. Testinterface2 obj = new Testinterface2();
14. obj.print();
15. obj.show();
16. }
17. }
Test it Now
Hello
Welcome

51) What is marker or tagged interface?
An interface that have no member is known as marker or tagged interface. For example: Serializable, Cloneable, Remote etc. They are used to provide some essential information to the JVM so that JVM may perform some useful operation.
1. //How Serializable interface is written?
2. public interface Serializable{
3. }

Nested Interface in Java
Note: An interface can have another interface i.e. known as nested interface. We will learn it in detail in the nested classes chapter. For example:
1. interface printable{
2. void print();
3. interface MessagePrintable{
4. void msg();
5. }
6. }
More about Nested Interface
Next TopicDifference between Abstract class and interface
52) Can there be any abstract method without abstract class?
No, if there is any abstract method in a class, that class must be abstract.
53) Can you use abstract and final both with a method?
No, because abstract method needs to be overridden whereas you can’t override final method.
54) Is it possible to instantiate the abstract class?
No, abstract class can never be instantiated.
55) What is interface?
Interface is a blueprint of a class that have static constants and abstract methods. It can be used to achieve fully abstraction and multiple inheritance.
56) Can you declare an interface method static?
No, because methods of an interface is abstract by default, and static and abstract keywords can’t be used together.
57) Can an Interface be final?
No, because its implementation is provided by another class.

58) Why use java finally
o Finally block in java can be used to put “cleanup” code such as closing a file, closing connection etc.
Usage of Java finally
Let’s see the different cases where java finally block can be used.
Case 1
Let’s see the java finally example where exception doesn’t occur.
1. class TestFinallyBlock{
2. public static void main(String args[]){
3. try{
4. int data=25/5;
5. System.out.println(data);
6. }
7. catch(NullPointerException e){System.out.println(e);}
8. finally{System.out.println(“finally block is always executed”);}
9. System.out.println(“rest of the code…”);
10. }
11. }
Test it Now
Output:5
finally block is always executed
rest of the code…
Case 2
Let’s see the java finally example where exception occurs and not handled.
1. class TestFinallyBlock1{
2. public static void main(String args[]){
3. try{
4. int data=25/0;
5. System.out.println(data);
6. }
7. catch(NullPointerException e){System.out.println(e);}
8. finally{System.out.println(“finally block is always executed”);}
9. System.out.println(“rest of the code…”);
10. }
11. }
Test it Now
Output:finally block is always executed
Exception in thread main java.lang.ArithmeticException:/ by zero
Case 3
Let’s see the java finally example where exception occurs and handled.
1. public class TestFinallyBlock2{
2. public static void main(String args[]){
3. try{
4. int data=25/0;
5. System.out.println(data);
6. }
7. catch(ArithmeticException e){System.out.println(e);}
8. finally{System.out.println(“finally block is always executed”);}
9. System.out.println(“rest of the code…”);
10. }
11. }
Test it Now
Output:Exception in thread main java.lang.ArithmeticException:/ by zero
finally block is always executed
rest of the code…

59) What is the basic difference between string and stringbuffer object?
String is an immutable object. StringBuffer is a mutable object.

60) What is the difference between StringBuffer and StringBuilder ?
StringBuffer is synchronized whereas StringBuilder is not synchronized.

61) What is the purpose of toString() method in java ?
The toString() method returns the string representation of any object. If you print any object, java compiler internally invokes the toString() method on the object. So overriding the toString() method, returns the desired output, it can be the state of an object etc. depends on your implementation.
62) How many objects of a servlet is created?
Only one object at the time of first request by servlet or web container.
63) What is the life-cycle of a servlet?
1. Servlet is loaded
2. servlet is instantiated
3. servlet is initialized
4. service the request
5. servlet is destroyed
64) What is difference between PrintWriter and ServletOutputStream?
PrintWriter is a character-stream class where as ServletOutputStream is a byte-stream class. The PrintWriter class can be used to write only character-based information whereas ServletOutputStream class can be used to write primitive values as well as character-based information.

65) What is difference between GenericServlet and HttpServlet?
The GenericServlet is protocol independent whereas HttpServlet is HTTP protocol specific. HttpServlet provides additional functionalities such as state management etc.

66) What is servlet collaboration?
When one servlet communicates to another servlet, it is known as servlet collaboration. There are many ways of servlet collaboration:
• RequestDispacher interface
• sendRedirect() method etc.
67) What is the purpose of RequestDispatcher Interface?
The RequestDispacher interface provides the facility of dispatching the request to another resource it may be html, servlet or jsp. This interceptor can also be used to include the content of antoher resource.
68) Can you call a jsp from the servlet?
Yes, one of the way is RequestDispatcher interface for example:
1. RequestDispatcher rd=request.getRequestDispatcher(“/login.jsp”);
2. rd.forward(request,response);

69) What is difference between ServletConfig and ServletContext?
The container creates object of ServletConfig for each servlet whereas object of ServletContext is created for each web application.
70) What is Session Tracking?
Session simply means a particular interval of time.
Session Tracking is a way to maintain state of an user.Http protocol is a stateless protocol.Each time user requests to the server, server treats the request as the new request.So we need to maintain the state of an user to recognize to particular user.
71) What are Cookies?
A cookie is a small piece of information that is persisted between the multiple client requests. A cookie has a name, a single value, and optional attributes such as a comment, path and domain qualifiers, a maximum age, and a version number.
72) What is difference between Cookies and HttpSession?
Cookie works at client side whereas HttpSession works at server side.
73) What is filter?
A filter is an object that is invoked either at the preprocessing or postprocessing of a request. It is pluggable.
74) How can we perform any action at the time of deploying the project?
By the help of ServletContextListener interface.
75) What is the disadvantage of cookies?
It will not work if cookie is disabled from the browser.

76) How can we upload the file to the server using servlet?
One of the way is by MultipartRequest class provided by third party.

77) What is load-on-startup in servlet?
The load-on-startup element of servlet in web.xml is used to load the servlet at the time of deploying the project or server start. So it saves time for the response of first request.

HTML

HyperText Markup Language, commonly abbreviated as HTML, is the standard markup language used to create web pages. Along with CSS, and JavaScript, HTML is a cornerstone technology used to create web pages,[1] as well as to create user interfaces for mobile and web applications. Web browsers can read HTML files and render them into visible or audible web pages. HTML describes the structure of a website semantically and, before the advent of Cascading Style Sheets (CSS), included cues for the presentation or appearance of the document (web page), making it a markup language, rather than a programming language.

HTML elements form the building blocks of HTML pages. HTML allows images and other objects to be embedded and it can be used to create interactive forms. It provides a means to create structured documents by denoting structural semantics for text such as headings, paragraphs, lists, links, quotes and other items. HTML elements are delineated by tags, written using angle brackets. Tags such as <img /> and <input /> introduce content into the page directly. Others such as <p>...</p> surround and provide information about document text and may include other tags as sub-elements. Browsers do not display the HTML tags, but use them to interpret the content of the page.

HTML can embed scripts written in languages such as JavaScript which affect the behavior of HTML web pages. HTML markup can also refer the browser to Cascading Style Sheets (CSS) to define the look and layout of text and other material. The World Wide Web Consortium (W3C), maintainer of both the HTML and the CSS standards, has encouraged the use of CSS over explicit presentational HTML since 1997.[2]