Top Tricky Java Interview Questions and Answers | Java Interview Questions and Answers | Code Decode

[@croydon21H]

Well done. I like (majority of) the questions. Interviews in India need Q & A type like this. In overseas people ask questions from their project to know the interviewee ideas from a practical point of view.

[@swapnilbagul7502]

Recently ,I had a interview for JAVA... And interviewer asked the difference between the security provided by abstraction and Encapsulation......could you pls answer it....

[@rajasekharb4667]

Could you please explain the scenarios in realtime applications where we use these Factory Design pattern and Abstract Design pattern

[@chandrarami1767]

Good thumbnails are good to entering into ur video...and u explain good with example....i just stick to till end....thx lot for ur thumbnails

[@CodeDecode]

🙂thanks Chandra 👍👍

[@saivamsi4811]

You are giving really a wonderful content to the people. Thank you So much .A small suggestion from my side is a small snipped of code can be shown along with audio. That will give a better picture of the topic.

[@CodeDecode]

Thanks Sai. Sure, we have live demos in all videos except these quick interview Revision questions . We prepared them just have a quick look before interview. You don't even have to look at your phone number still u have your quick revision done. Rest all videos have Java code demonstrated 🙂👍

[@RussianCyclop]

Thank you for your videos. A little note on this one, your info about bean scopes is outdated, there are 6 bean scopes now and there is no more global session scope.

[@RamzanAli-vr1ww]

Please, Create more videos for this, It was very helpful.

[@CodeDecode]

Sure Ramzan 👍thanks

[@kan123ish]

Anyhow we are using the != for checking the null pointer exception, then what is the need of using the optional class in java

[@CodeDecode]

the Optional class includes methods to explicitly deal with the cases where a value is present or absent. However, the advantage compared to null references is that the Optional class forces you to think about the case when the value is not present.

[@kan123ish]

@@CodeDecode can you please explain in real time or with the example

[@CodeDecode]

@@kan123ish sure Keerthana we will create seperate video for that. 👍👍

[@adwaitamohanty5049]

Helpful for Interview Preparation. Please continue. Mam, could you please explain little more about hashmap changes on 1.8 I.e. what is that threshold value at which the Linkedlist changes to Balanced Tree.

[@CodeDecode]

Sure Adwaita, we will create seperate video on this java 8 enhancement. 👍👍

[@adwaitamohanty5049]

@@CodeDecode okay. Thanks for your quick reply.

[@CodeDecode]

Any time 👍👍🙂🙂

[@nethisaicharan3037]

Thank you for the video! When do you resume the microservices? Since it was started last week!

[@CodeDecode]

This week Nethi👍👍

[@nethisaicharan3037]

@@CodeDecode Thank you so much

[@CodeDecode]

👍👍🙂🙂

[@amitajadhav9200]

Please make more videos like this for advanced questions...

[@CodeDecode]

Sure Amita👍👍

[@nagalakshmikesavan9198]

Hey Thank you soo much for the video!! Can you explain Why optional class instead we can check for null using == ? This was asked in an interview

[@CodeDecode]

the Optional class includes methods to explicitly deal with the cases where a value is present or absent. However, the advantage compared to null references is that the Optional class forces you to think about the case when the value is not present.

[@nagalakshmikesavan9198]

@@CodeDecode Thank you!!

[@CodeDecode]

@@nagalakshmikesavan9198 👍👍🙃

[@jabirshariff7378]

Another great and useful video. . 😊 Ma'am you said Tuesday you will upload next video on microservices.. Waiting for that.. 😔

[@CodeDecode]

Right Jabir. But got stuck with this video. We are so sorry. We are working IT professionals, it's difficult to spare time for 2 videos in weekends. But it's almost ready we will put that video this week for sure. Thanks for bearing with us 👍👍

[@jabirshariff7378]

@@CodeDecode Thank you for the update ma'am:)

[@sandeephr6298]

Hi , I have been following all your videos and it's amazing and very helpful , can you please create a tutorial on micro-service docker with MySQL

[@CodeDecode]

kzbin.info/aero/PLyHJZXNdCXsd2e3NMW9sZbto8RB5foBtp

[@Thiru-zt5lw]

you are doing an excellent job and there is no words to say about your contribution. Really i appreciate you from my bottom of my heart. Great Work ..

[@CodeDecode]

Thanks a lot 🙂

[@Thiru-zt5lw]

There is one interview question how will you migrate from structs to spring? How will you migrate from ant to maven? There is 5 million request how will you make sure and what's your suggestion to do scalable and how will you increase your performance.

[@shubhisharma3790]

Can you please elaborate the function of Optional class with Example. Couldn't understand its functioning.

[@CodeDecode]

Ok sure. We will create another video just on optional class

[@abhayvarma5146]

Please create more.. this is very good

[@CodeDecode]

sure we will create more soon.....

[@khyatijoshi7809]

Really a help please continue with such video

[@CodeDecode]

Sure Khyati. We will continue with this series 🙂🙂👍👍

[@shivamsawhney4263]

@@CodeDecode 98uyhk

[@hemapriyaammu7365]

In one of the interview they asked me to sort employee based on id and name? Can please tell how it was implemented in java8

[@ANKITCHOUDHARYankitkrchy]

Check sorted Comparator.comparing method and thanComparing() methods

[@CodeDecode]

Right Ankit 👍👍

[@hemapriyaammu7365]

@@ANKITCHOUDHARYankitkrchy I want for 2 employee objects

[@abhinavmishra9690]

Thanks for such informative content

[@CodeDecode]

🙃🙃👍👍

[@monikadhaterwal8285]

Please also show answer on screen . Sometimes getting problem in understanding

[@CodeDecode]

Sure Monika 👍

[@CodeDecode]

Anything like : kzbin.info/www/bejne/q4amaJahn8x8ldE

[@krishnareddy-ro2rp]

Please do a video on serialization

[@CodeDecode]

sure we'll make one soon.....

[@RajYadav-fy4lm]

Mam please make more videos for Java 8, multithreading, Spring. I am following your videos for my interview prep. Thank you for such content

[@CodeDecode]

Sure Raj. If we get proper response we will keep on creating this series

[@santhoshivempati9757]

@@CodeDecode yes please upload more videos for Java ma'am. Very useful for interview. Thank you so much...

[@CodeDecode]

Sure Santhoshi, we will keep posting video in this series 👍👍

[@gulfamhassan4635]

I ask this question regularly on interview but 80 % candidate fail to answer or not able to explain well. Q. Which method will execute if we call method by passing value null. Eg fx(null) public void fx(String s){ sop(1); } public void fx(Integer i){ sop(2); } If you think it print 1 then you are wrong.

[@vitthalchandankar9128]

public void fx(Integer i) : if argument is int here then o/p will be 1 but its Integer , hence compiler will throw ambiguity error.

[@arushigupta105]

answer would be compile time error because the compiler gets confused with which method is being called since both are accepting non primitive data types so null can be accepted by both the methods

[@ushirranjan6713]

Thank you so much mam for all your videos. It's really very helpful for the interview preparation. Could please creat some more videos on java hibernate and spring

[@CodeDecode]

Sure Ushir, we will continue this series👍👍

[@csv2286]

Need spring framework interview questions

[@CodeDecode]

Yes, that's remaining, we will upload that too 👍👍

[@csv2286]

@@CodeDecode Thanks for accepting my request

[@brvikas4426]

Ma'am please upload JDBC and Sql interview questions.

[@CodeDecode]

Sure 👍

[@AshutoshMohanty07]

That was a nice and simple explanation about HashMap enhancement, Spring AOP and Garbage Collection enhancement. Can your team create some interview question on DS & Algo ? Thanks again for providing the informative content!

[@CodeDecode]

Sure Ashutosh, ds algo is in pipeline 👍👍🙂🙂

[@karthikeyanu2115]

Useful video. Can you just tell me how to clear cache in hibernate

[@CodeDecode]

session clear() method to clear the cache i.e delete all the objects from the cache. We can use session contains() method to check if an object is present in the hibernate cache or not, if the object is found in cache, it returns true or else it returns false.

[@anilkumaryella3556]

Can you explain what is spliterator in Java

[@usamaansari7903]

this interview question is for how much year of exp peoples ? cuz as a fresher don't knw this questions

[@CodeDecode]

Right, not all questions are required for freshers, but we were constantly getting comments to increase the level. Hence we increased the level a bit in this video

[@madhuripandit1831]

Thank you so much mam, you have helped me a lot during my preparation

[@CodeDecode]

Thanks 🙏🙏this means a lot to us 👍👍

[@suryanshraghuvanshi9761]

these types of question generally get asked in interviews

[@CodeDecode]

Yes

[@chotasafasaana]

Try answer little bit slowly ,its too fast to understand what exactly you are trying to say and it's confusing as well

[@CodeDecode]

Ok, we will reduce the pace from next video 👍👍

[@chotasafasaana]

@@CodeDecode thanks...

[@CodeDecode]

Thanks for observing and helping us in improving👍👍

[@nandanhj7053]

Excellent

[@CodeDecode]

Thanks

[@AshishSharma-mf4sg]

Amazing ✌️✌️✌️

[@CodeDecode]

Thanks Ashish 👍

[@sudheerkumar-tp1mg]

Feedback is selected

[@CodeDecode]

🤓hehe thanks Sudheer. This is funny 😂

[@dhirajctx]

Awesome video

[@CodeDecode]

Thanks Dhiraj 🙂🙂

[@SinghRahul-]

Plz come with micro service project.. Waiting

[@CodeDecode]

Sure Rahul, next is micro services only then 👍👍

[@nikhilsharma-kd4pi]

Thank you so much for these important questions..... Looking forward to get more from you🤞👍

[@CodeDecode]

Sure Nikhil 👍👍

[@vnvllucky3677]

Mam real time project pleaseee

[@CodeDecode]

Sure 👍

[@naveenreddy7320]

You did a great job by posting the trending java interview questions. sorry to say this, please don't say NOTHING BUT in every sentence. it doesn't make any sense out there.

[@CodeDecode]

Thanks for pointing it our. We worked on it and now it's no more used in recent videos 🙂🙂👍👍

[@bhushandhapodkar7577]

Please explain with code

[@CodeDecode]

👍