Java Interview Questions and Answers | Java Tutorial | Java Online Training | Edureka

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This Edureka Java tutorial video will help you to prepare yourself for Java Interviews ( Java Interview Questions Blog: goo.gl/831IWs ). Learn about the most important Java interview questions and answers and know what will set you apart in the interview process.
Check out our Java Playlist: goo.gl/ES3dI3
This tutorial covers Java Interview Questions on:
4:08 Basic Java Interview Questions
38:51 OOPS Interview Questions
58:35 Servlets
1:07:37 JDBC
1:15:26 Spring
1:32:22 Hibernate
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About the Course
Edureka's Advanced Java/J2EE and SOA training and certification course is designed for students and professionals who want to be a Java Developer. This is a 42 hour course which will cover both core and advanced Java concepts like Database connectivity, Threads, Exception Handling, Collections, JSP, Servlets, XML Handling etc. We will also learn various Java frameworks like Hibernate and Spring. During our Java/ Certification training, our instructors will help you:
1. Develop the code with various Java data types, conditions and loops.
2. Implement arrays, functions and string handling techniques.
3. Understand object oriented programming through Java using Classes, Objects and various Java concepts like Abstract, Final etc.
4. Implement multi-threading and exception handling.
5. Use parse XML files using DOM and SAX in Java.
6. Write a code in JDBC to communicate with Database.
7. Develop web applications and JSP pages.
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9. Write code with spring framework components like Dependency Injection and Auto Wiring.
10. Implement SOA using web services.
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Who should go for this course?
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Why learn Java?
Java is a general-purpose, class-based, object-oriented computer programming language that was designed by James Gosling at Sun Microsystems in 1995.
Key Highlights of Java:
Platform Independent: This allows programmers to develop applications that can run on any operating system.
Usability of Java: Java is most widely used programming language. It is present everywhere. It really doesn't matter which domain you are working in, you will surely come across Java sooner or later!
Open Source: The good news is that Java is available for free! All the development tools and the environment (JRE & JDK) that is used to develop Java applications are absolutely free of cost.
Android: Irrespective of the fact that you are tech savvy or not, most of us are badly bitten by the Android bug! Android is in great demand today and fortunately you need Java for Android development. Hence, the importance of Java has increased even more.
Hadoop: Hadoop is one of the most trending framework for processing Big Data. It has been designed and developed in Java.
In spite of having a tough competition on the server side from Microsoft and other companies, Java is doing extremely well on mobile platforms, thanks to Android! It has also been the primary language for Hadoop Developers.
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Got a question on the topic? Please share it in the comment section below and our experts will answer it for you. For Java Training Curriculum, Visit our Website: bit.ly/32Ymvde Use Code "𝐘𝐎𝐔𝐓𝐔𝐁𝐄𝟐𝟎" to get Flat 20% off on this training.

[@dominykaskisonas223]

4:15 What is the difference between JDK, JRE and JVM? 5:50 What is synchronization? 7:38 What are the differences between processes and threads? 13:36 What are Wrapper classes? 17:18 What purpose does the keywords final, finally and finalize fulfill? 21:20 What is the difference between StringBuffer and StringBuilder? 24:58 What are the differences between Heap and Stack memory? 39:03 What is the difference between Abstract classes and Interfaces? 53:14 What is the difference between method overloading and method overriding? 55:03 Can you ovveride a private or static method in Java? 55:43 What is multiple inheritance and does java support it? 59:03 What is a Servlet? 1:00:41 What is the difference between Get and Post methods? 1:04:45 What is the lifecycle of a servlet? 1:16:01 What is Spring?

[@Srijan_04]

So far, This is the best ever resource for understanding java which I have seen. This guy Ishant does magic and everything gets into the brain xD. Thanks a lot, Edureka and Ishant

[@krishnaverma7744]

Thanks for sharing the the video, its really helpful. Many thanks....

[@mokshadanayak9182]

Very informative video and nicely explained.Very well done.Thank you so much for sharing with us.

[@edurekaIN]

Hey Mokshada, thank you for watching our video. Do subscribe, like and share to stay connected with us. Cheers :)

[@taz6626]

Hello! It is more than perfectly explained everything! Thank you!

[@edurekaIN]

Thank you for watching our video. Do subscribe, like and share to stay connected with us. Cheers :)

[@bakchodhutiyapa8298]

i like this channel a lot !! regula viewr ! congrats keep it up!

[@VEMPARALATEJABEC]

So practical and cleanly explained this is what you need when you want to implant a concept in your mind.Haven’t found a better tutor so far in youtube

[@edurekaIN]

Thanks for the compliment Vemparala! We are glad you feel that way. Do subscribe to the channel and hit the bell icon to never miss an update from us in the future. Cheers!

[@AbhishekSaxenaEnggIT]

Thank you for the valuable questions. I feel more confident!

[@edurekaIN]

Hey Abhishek, we are glad to have helped you. Do subscribe and stay connected with us. Cheers :)

[@ltmikepick]

Awesome! I subscribed because you helped me to understand and remember java concepts

[@meghagupta6994]

This session was too good and helpful... Thank you very much for this effort this really means a lot to us n i really enjoyed n learned things more clearly...

[@edurekaIN]

Thank you for appreciating our efforts. We are glad the video was of great help to you. Do subscribe to our channel and stay connected with us. Cheers :)

[@mohitvalechay]

Thanks for putting together these questions together..thank you

[@alsan8935]

Great great work by ishant..🙌🙌🙌. Good job guys. It’s big help for fresher and java community...Thanks

[@DonCachuela22]

Thanks for this!

[@rohanbattula5233]

This video is amazing, one of the best java videos ive seen on youtube.

[@bhartirajpal5402]

Very useful video. Every Concept is explained very clearly.

[@chandushetty6065]

very use full. Thank you so much...........

[@ShubhamSharma-ni1nj]

Thank you so much ☺ I had a wonderful time 🙋

[@charchilgupta]

Very helpful ....Thanks a lot

[@MrSampathmca]

very superb video.. i have enjoyed so much...

[@poojaagarwal2208]

A very useful Video to prepare for Java interview. Thank You for the Video!!!!

[@aathiranair704]

such an informative session!! thank you so much Edureka :)

[@johnjames6717]

Hello. Thank you for this video. I learned a lot.

[@noothivinun8204]

Perfect video to recall and learn all the JAVA concepts

[@LizardanNet]

Thanks for this. Java interview tomorrow.

[@edurekaIN]

+Lizardan, thanks for checking out our tutorial. Hope your interview went well. :) Do subscribe to stay posted on our upcoming tutorials. Cheers!

[@bharatranpariya5581]

very nice, better then many of the articles. good job.

[@edurekaIN]

Hey Bharat, thank you for watching our video. Do subscribe, like and share to stay connected with us. Cheers :)

[@zaboomafia]

Thank you for this great tutorial!

[@edurekaIN]

Thanks for the compliment, James! We are glad you loved the video. Do subscribe to the channel and hit the bell icon to never miss an update from us in the future. Cheers!

[@ravindrasarode6752]

Wonderful video to solve my basic concepts here, thank you so much eureka is a good platform for learning.

[@alittlecoding]

Thank you very much. Best video

[@ehsansasanian9653]

so far ... the best video of recapping important concepts in java, well done Thank You!

[@deepakmeher9913]

Nice ans helpfull.Thank

[@preethij5931]

Can't describe in words how good this tutorial is.thank you so much for the effort

[@kamalgarg6313]

Thank you so much for amazing videos. Could you also please make videos on system design interview questions in Java like 1) Design a traffic control system 2) Design a elevator system 3) Design a parking lot system etc.

[@ridhisharma6062]

thank you for this. I am working in mainframe but wish to switch in Java. what will I require to do that

[@edurekaIN]

Hey Ridhi, thanks for checking out our tutorial! As a mainframe developer you would some idea about programming. You can learn Java if that's the career track you are interested in. You can check out our Java course that is designed to give you hands-on experience: www.edureka.co/java-j2ee-soa-training. You will also get to work on a project towards the end of the course. The pre-requisites to learn Java are prior programming experience and familiarity with basic concepts such as variables/scopes, flow-control, and functions. Prior exposure to object-oriented programming concepts is not required, but definitely beneficial. Hope this helps. Cheers

[@vinithashetty5520]

I understood a lot please do more videos thank you so much!!

[@danielplainview2360]

Excellent analysis. Very well articulated and easy to follow.

[@edurekaIN]

Thank you for you time in giving a feedback :) We are glad that you are learning from our videos! Stay connected with our channel :)

[@aishgk0912]

Thank you so much, edureka! for uploading this video. This is so helpful for interview preparations. All the other videos breaking down the basic concepts of Java were also excellent.

[@TheMacgari]

Its really great!

[@hippiestafarii]

Yes !!! Very nice video, thanks a lot :-)

[@thomaserian358]

Perfect tutorial thank you very much

[@edurekaIN]

Hey Thomas, thank you for watching our video. Do subscribe, like and share to stay connected with us. Cheers :)

[@mohammedsufi4649]

Very Very useful video. Hats off to edureka. Please keep up your great work

[@edurekaIN]

Hey Mohammed, thank you for watching our video and appreciating our efforts. Your words is our motivation. Cheers :)

[@chakidan]

Thank you. Excellent Job. Very helpful and was a quick ramp up i could not have found anywhere else.

[@edurekaIN]

Hey Charaka, thanks for checking out our tutorial! We're glad you found it useful. Do subscribe to our channel to stay posted on upcoming videos. Cheers!

[@sujanabandari35]

Thank you very much for sharing such an amazing interview questions to us.Very helpful those who are seriously trying for interviews.

[@edurekaIN]

Hi : ) We really are glad to hear this ! Truly feels good that our team is delivering and making your learning easier :) Keep learning with us .Stay connected with our channel and team :) . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

[@bhaveshmurug1548]

Nice Video Edureka keep it up n thanks for easy way to help us .

[@edurekaIN]

Thank you for watching our video. Do subscribe, like and share to stay connected with us. Cheers :)

[@sreerupakatamoni3087]

Thank you for this vedio.this is really help full.can u plz share the slides sir

[@girish90]

This is a excellant tutorial!

[@Dishasareen_]

Bless you! Such Clarity!!

[@edurekaIN]

Hey Disha! Thanks for the compliment. We are glad you loved the video. Do subscribe to the channel and hit the bell icon to never miss an update from us in the future. Cheers!

[@anandsinghnaruka5175]

Hey ishant ..u have very well explained ...thank you

[@otherworks2085]

WOW its very helpful ! plz upload more or part TWO plz

[@edurekaIN]

+Otherworks, thanks for checking out our tutorial. We're glad you liked it. Here's the link to our Java playlist: kzbin.info/aero/PL9ooVrP1hQOHb4bxoHauWVwNg4FweDItZ. Hope this helps. Cheers!

[@chat3min]

Best revision video for Java OOPS and other basic questions before your onsite interview. Thank you.

[@edurekaIN]

Hey Somal, thank you for appreciating our work. Do subscribe an stay connected with us. Cheers :)

[@travelwithsushrut]

Awesome explanation of Abstract class.

[@VishalSharma-rn7mt]

This is awesome , thank you so much

[@kanaparthysaiteja5589]

WONDERFUL SIR TRULY ENJOYED AND LEARNED ALOT IN SIMPLE, CLARITY AND EFFECTIVE MANNER. THANKS

[@divyaparashar4060]

Very good compilation of questions and Greatly explained answers !! Thank you

[@edurekaIN]

Hi Divya, thanks for the wonderful feedback! We're glad we could be of help. You can check out our complete Playlist here: goo.gl/HxmSm9 Do subscribe to our channel to stay posted on upcoming tutorials. Cheers!

[@anuraggwl]

Very Informative .. Please have a separate video for Spring and Hibernate

[@edurekaIN]

Hey Anurag, thanks for checking out our tutorial. Here's the link to our Spring interview questions tutorial: kzbin.info/www/bejne/r3-8aXuCoJabhK8 We do not have an interview questions tutorial for Hibernate, but perhaps these videos will help you prepare: kzbin.info/aero/PL9ooVrP1hQOGddZSIsq4d0nhZDMZlPY1X. Hope this helps. Cheers!

[@shubhamsoni8093]

Thanks. This was the best way to learn before a viwa

[@georgevisan973]

Great job! Thanks!

[@user-id8wu5qe2u]

Thank you fo video. Very usefull.

[@DonAngelo333]

God bless you for your video and explainations! I am studying 2 hours before the interview. It's going to be fun!

[@edurekaIN]

Thank you so much for the review ,we appreciate your efforts : ) We are glad that you have enjoyed your learning experience with us .Thank You for being a part of our Edureka team : ) Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

[@kajalkoravi4092]

very useful and informative video ,i got to learn much more while preparing for questions ,thank you for this video

[@edurekaIN]

Hey Kajal! We are delighted to know that you liked our content. Subscribe, like and share to stay connected with us. Cheers :)

[@karthickt]

Very informative video, Thanks for brushing all the topics.. Nicely explained ☺️

[@edurekaIN]

Hi : ) We really are glad to hear this ! Truly feels good that our team is delivering and making your learning easier :) Keep learning with us .Stay connected with our channel and team :) . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

[@Yashkurzekar]

Thank you so much for such an informative session, everything is in so simple manner so everyone can understand it very easily. Thank you again.

[@shiv12592]

great work..edurekha.., plz upload vidios for android and mysql interview purpose.

[@edurekaIN]

Hey Shiv, glad you loved the video. Do subscribe to never miss an update from us in the future. We will surely process your request as soon as possible. Cheers!

[@hippiestafarii]

Hi !!! Very helpful video, tks a lot :-)

[@edurekaIN]

Thank you for watching our videos and appreciating our work. Do subscribe to our channel and stay connected with us. Cheers :)

[@keshavkuruva2581]

Flow of explanation is very clear tqqq for video ....

[@vinithmahendran235]

Excellent video... Java simplified😄👌🏻

[@anniek7259]

Very interesting edureka blog.. I understood alot which i don't know.. Thank you team..

[@edurekaIN]

Thanks for the compliment, Annie. We are glad that our video was of great help to you. Do subscribe to our channel and stay connected with us. Cheers!

[@everyonecancode1613]

Awesome !

[@sid31ful]

Nicely explained. Keep it up!!

[@zippy.gaurav]

Really a helpful video. Thank you :)

[@edurekaIN]

Hey Gaurav, we are glad you loved the video. Do subscribe to the channel and hit the bell icon to never miss an update from us in the future. Cheers!

[@prashanthinaughty]

It is really an awesome video...thanku sooo much

[@edurekaIN]

Greetings! Thank you for watching our video. Do subscribe, like and share to stay connected with us. Cheers :)

[@sujithagurumurthy2116]

Thank you. Appreciate your work

[@edurekaIN]

Hey Sujitha, we appreciate you finding time and going through our video. Do subscribe and stay connected with us. Cheers :)

[@sivaranjanis8605]

Superb, it's very useful

[@edurekaIN]

Hey Sivaranjani, thank you for watching our tutorials. Checkout our playlist on Java tutorials: bit.ly/2HkilmL Hope this helps :)

[@culwin]

This is great, you should do more like this! Especially more of the "basics" and borderline advanced stuff!

[@edurekaIN]

Hey Culwin, yes, we will work to create more content on the basics of various technologies. Thank you for your suggestions, we hope you liked our work. Do subscribe and stay connected with us. Cheers :)

[@StudentTechnique]

thank you Edureka! keep it up. It is really very helpful.

[@edurekaIN]

Thank you for your review : ) We are glad that you found our videos /contents useful . We are also trying our best to further fulfill your requirements and enhance your expirence :) Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

[@verzinmaar1648]

Very clearly explained, you're a good teacher. Thanks!

[@rameshkumar171]

it's really great video...thank you..

[@edurekaIN]

Thank you for appreciating our work. Do subscribe, like and share to stay connected with us. Cheers :)

[@CodingSkills]

nice compilation of Q & A

[@sudhakalamadi1890]

Nice

[@jayant2716]

You are Genius Sir...

[@edurekaIN]

Hey Jayant, thank you for appreciating our trainers. Do subscribe and stay connected with us. Cheers :)

[@satishyerni1743]

hai sir we r very lucky have this session very help full sir

[@divyap3295]

Ishan ur awesome ..... really explained very well...TQ

[@DanilloLoboFerraz]

Thank you so much for your content! Regards from Brazil!

[@edurekaIN]

Thank you so much : ) We are glad to be a part of your learning journey. Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

[@krantishedage5641]

Nice session.... thank you so much 😊

[@leomonz]

very nice video and easy organized and clear...

[@meherkhan933]

Top class man! Thanks

[@edurekaIN]

Thank you for watching our video. Do subscribe, like and share to stay connected with us. Cheers :)

[@sumitagarwal4591]

Great work done here guys, Can you also please make a video/videos for common coding interview questions and how to go about them topicwise

[@ranjansapkota7572]

very nice video thank you for this video

[@notradingonfriday9227]

Thank you so much for the practical knowledge u gave🙏

[@StudentTechnique]

thanks for this interview video.

[@edurekaIN]

Thank you so much : ) We are glad to be a part of your learning journey. Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

[@raviburud8664]

really nice video

[@piyushdutta2777]

edureka videos are just awesome covers each and every topic,not only java bt python,linux every progamming language, thank you edureka team

[@bibekroy1318]

This was simply awesome.. looking forward to see more videos from you...

[@edurekaIN]

Thank you so much : ) We are glad to be a part of your learning journey. Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

[@vivekkumar-nw1qv]

Congratulations for 1M 💐💐💐

[@Sapvision01]

One of the best explanation over this channel thanks for sharing your knowledge with us god bless you.....

[@edurekaIN]

You're welcome 😊 Stay connected with our channel and team :) . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

[@tubepankajyou]

Awesome collection of questions. Thanks you very much.

[@edurekaIN]

Thank you so much : ) We are glad to be a part of your learning journey. Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

[@ajaykotiyal427]

After Java 1.8 default implementation is possible in interfaces, and it has been launched a long ago, this should be included in this video. Well thanks for the video

[@edurekaIN]

Thanks for watching the video, Ajay. We will consider this and update it soon.

[@viswanathbadipalli9351]

Very informative

[@mahaboobvali7018]

Vedio is good. I think there is need for small change at 30:40 .You have mentioned about Heap in Stack and vice versa

[@subashchokkalingam6312]

Really Great....!!!