Java mock interview | Hibernate / JPA | java interview questions and answers for experienced 5 years

This Live java mock interview contains a variety ofJava interview questions from Java, JPA, Hibernate, and Spring. In this specific video we will discuss few most Asked interview questions in hibernate and in the part - 2 of this interview we will discuss more of coding challenges and Spring and Microservices questions.
Candidate Info : Name: Yash Bhatia
Profile: Java Developer
Years Of Experience: 4+
Work Location: Delhi, India
Keyskills: Java, Microservices, Spring, Restful Webservices, Hibernate, JPA, Spring Data
Watch Previous Mock (Discussion on Spring / Microservices / Java / Restful Webservices)
• Java interview questio...
Timestamp :
00:00:00- Introduction
00:03:46 - Q1. Difference between Hibernate and Jdbc (hibernate vs JDBC)
00:06:53 - Q2. Session VS Session factory (Differences)
00:09:57 - Q3. Can you create multiple session factory objects? Justify your answer!
00:11:09 - Q4. What is the equivalent object of the session in JPA?
00:13:04 - Q5. What is persistence context in JPA / Hibernate?
00:14:55 - Q6. Explain the first level of caching in Hibernate.
00:20:00 - Q7. Justify the difference between get() and load() in Hibernate.
00:24:00 - Q8. get method Vs load method [Coding Challenge]
00:32:17 - Q9. Explain the transient state in JPA/ Hibernate.
00:37:17 - Q10. What is a detached state in hibernate?
00:37:50 - Q11. How to detach an entity object from the persistence state without closing the session?
00:41:58 - Q12. Coding challenge on Hibernate states.
00:46:50 - Q13 - Why do we need a connection pool?
00:52:56 - Q14 - How will you implement connection pooling in your project?
00:57:18 - Q15- What are the fetch types available in hibernate? Explain how will you use it in real-time.
01:01:18 - Q16 - Eagar Vs Lazy code practice
01:12:29 - Q17 - What is a @Generated value annotation? Explain the different generation types available in JPA / hibernate.
01:19:11 - Q18 - Code Practice [Auto Vs Identity Vs Table generation type]
01:27:29 - Q19 - Explain the advantages of Named queries in hibernate/JPA?
01:29:20 - Q20 - What is Criteria API in Hiberante? Explain the advantages.
01:33:19 - @NamedQuery/@NamedQueries quick KT
01:41:03 - Criteria API In Hibernate quick KT[Query/Restrictions /Pagination/Filter demo]
Watch another Java Live Mock [spring/rest/java/microservices
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Category :
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Java interview questions and answers for experienced
java interview questions and answers for experienced 5 years
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java coding interview questions and answers
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[@pattanfirozkhan2414]

It definitely helps a lot, expecting the questions on real time production scenarios, Please do a session o design patterns, data structures and micro services as well.

[@anjurawatkathait1400]

I am preparing for the interviews these days, and your these 2 videos (mock interviews) just helped a lot. thanks Abhilash.

[@babunabiswal5007]

Thank you so much for constantly giving us depth knowledge about java. No doubt it helps a lot. Again I thank you for your free content. Love from Odisha ❤️💐

[@visukcse]

Simply great. It covers good amount of basic idea of hibernate and connection pool.

[@nstha8848]

This video could not get any better than this....well there might be more than what I expect in future... but for current time, masterpiece. This completely feels like podcast of programming interview....

[@jayakrishnathammana]

Wonderful! I felt my 2 hour was utilized with such a good video…

[@yasararafathk5954]

Thank you for this wonderful series Abhilash ... Please upload more videos like this .

[@jainampiparia1164]

I will make sure to share this amazing video,it takes so much effort to make such a long video with such detailing..Kudos keep it up.

[@parthpatel2681]

Thank you, it reminds all the concepts in one go. Very Good for last day interview preparation and also good to help to core concepts.

[@SeleniumExpress]

My pleasure, Parth !

[@parthpatel2681]

@@SeleniumExpress Could it possible to cover Java design patterns in coming mock interview rounds?

[@RahulSingh-qe4sw]

Thank a lot Abhilash. I have watched all your videos on mock interviews. And it has helped me a lot. I am planning to watch your other videos on java soon. Your explaination is simple and very clear.

[@kamalghai92]

I have started preparing for interview. After watching this video, I am feeling confident in Hibernate QAs. Thanks for this awesome video.

[@ManojKumar-xj3fw]

How come i missed your videos till now..You are just awesome..

[@jeet987]

Thanks a lot for the videos!! I have more than 5 years in the industry. But refreshing everything at one go and in a very interesting way!! I would like to see you pose questions on multi threading like futures or executors and real world scenarios. That would be incredible. FYI I have recommended your channel for all my juniors/friends in my company, you might be getting a few subscribers soon 😉. Cheers!

[@tzhynt]

Thanks too much. That's a lot to me. Your graphical expressions are marvelous!!

[@napster5944]

Really useful videos, will recommend on core Java mock interview questions!

[@ps_tech19]

Thank you so much Abhilash for these mocks. :)

[@SeleniumExpress]

My pleasure, Prakhar !

[@ayat_middya]

wonderful interview... I learned so many things, and I will request you take this type of interview so that we can get more knowledge from you😀. Happy learning, thank you so much

[@nuhazainab4796]

Thank you so much Abhilash 🙏... really really useful .

[@khushbukumari5317]

Thanks a lot for such a wonderful content... Please share more .... Really very helpful 👍👍👍

[@shaikmohammadsiddik2747]

Thank you Abhilash..It will really helpful.. Excepting more videos like this.. Looking forward on Java 8 topics

[@SeleniumExpress]

Will do more of these videos, Mohammad. Thanks for suggesting.🙂

[@saurabhsingh5909]

Bawal interview guruji, Thanks for this ❤️

[@SeleniumExpress]

My pleasure, Saurabh ! Glad that you liked it. ❤️

[@arjunvetal2274]

Thank you so much for constantly giving us depth knowledge about java. Love from Mumbai❤💐

[@mohammedsardar3779]

Please continue this series and it was more informative and interactive.

[@uk7826]

This is too much informative...Great

[@amintalukder7189]

Great Man,, this is excellent,,, damn good..

[@sibinthink7736]

Thanks brother, valuable classes...keep the spirit..

[@arsalalam5998]

cleared couple of doubt for jpa-jdbc-hibernate watching this . Thanks.

[@anuragk5450]

You are just a day late, Abhilash. I was asked maximum questions out of these 20 yesterday. The animations are just awesome. Just WOW!

[@SeleniumExpress]

Thank you 😊

[@navnathbhingare476]

It was really helpful..your efforts are much appreciated! Thanks 🙂

[@SeleniumExpress]

Glad that it helped, Navnath 😊

[@priyankapal3728]

Amazing question 😊 loved the whole mock session and learned a lotttt

[@supriyakamble2739]

Nice n helpful video...keep it up Abhilash..nice work.

[@SeleniumExpress]

Thank you, Supriya !!

[@virupakshak4746]

Thank you Abhilash & yesh. Its nice and useful session but people will understand more clearly Abhilash if you repeat the explanation of answer since you provide more authentic explanation. Anyway thank you so much 🙂

[@sumant2000]

Awesome, very helpful video.

[@supun_sandaruwan]

Amazing Tutorial, Thank you sir.

[@NeerajKumar-ix2vx]

Hat’s off to u and ur knowledge 👍

[@pravinlondhe9317]

very useful , Thank you for such videos

[@devashishmanjhi]

I am writing this comment even before watching the content that Its going to be a quality content.

[@mohdekrama8597]

GOD of all the hibernate content present on youtube !

[@jayakumarsivasankar9683]

Great Session. Really helpful

[@adityapathak4851]

Thanks for making this!

[@jagrutipatil1020]

This was a very wonderful session ...👍

[@rairai6202]

Mauj kr di😅 Much needed content.

[@SeleniumExpress]

😅thanks, Akash.Enjoy !!

[@AndhrakidZ]

yes really helpful to me.

[@ashwinkumar09uvce]

Thanks a lot for another useful mock interview session. Can you please create mock interview on microservives, DB concepts , Design Patterns etc...

[@lalit28689]

Very nice thank u ....🙏🏻🙏🏻

[@R_M965]

Keep it up..will be great if you can add java 8 memory model interview questions

[@smarthsharma2157]

I must say Abhilash you are awesome with the way you explain things 👌

[@SeleniumExpress]

Thanks, Smarth ! How are you doing? I remember speaking with you on Facebook, a year ago.😊

[@smarthsharma2157]

@@SeleniumExpress hey Abhilash...i am doing how good about you...yes i remember as well😃

[@mowglishihtzutoy5197]

Nice very helpful 👌 thanks bro

[@SeleniumExpress]

Thank you , Abhijit !

[@pratheeban3650]

Really useful content for everyone. Also please make the Design pattern and data structure videos if possible. bcoz I wonder when u talked abt the load method (Proxy pattern). So if u explain the DS and Design pattern that will help us pretty much. Anyhow thanks for ur effort.

[@SeleniumExpress]

Thanks, Pratheeban ! Check my website next week. I will post a video on proxy design pattern there.

[@pratheeban3650]

@@SeleniumExpress tq Abhilash... eagerly waiting.

[@SunnySingh-is2wm]

Fantastic interview sir!!!! Please present microservice along with java interview as well

[@SeleniumExpress]

Sure, Sunny ! Will be posting another one in a while.

[@nehurane]

Thank you Abhilash for this video. Liking and following interview series videos. Can we have a video for spring boot and also micro services related interview questions.

[@SeleniumExpress]

My pleasure, Neha. Sure, watch the next part of this video which has the microservices, spring Boot and coding challenge. We have few more mock scheduled which will also cover more spring Boot and microservices questions.

[@nehurane]

@@SeleniumExpress definitely sir. Thank you.

[@nguyenmai19978]

useful video, it helps me alot, can you add an interview sesion for transactional

[@abhishekverma6658]

very helpful thankyou so much

[@SeleniumExpress]

Thanks, Abhishek ! Glad that it helped.

[@gpavansai7207]

Hi abhilash , could you please explain the concept of JPA Criteria API, how to perform full join clause for the criteriaQuery. Thank you.

[@krishnakumarpaliwal1984]

I hardly like a video on youtube. But you really deserve my Like on these mock interviews and win my Subscription on your channel.

[@sandythandu]

Really helpful.. could make more videos on java8,Design Patterns

[@abilash.m295]

Anna please please kindly make videos for spring boot like how do you made for spring mvc and spring core. By using spring data jpa. If possible please kindly make videos on spring cloud also anna. Please this is a humble request. I saw your spring core videos. I've never seen anyone teaching in such an elegant manner in youtube and udemy. Thank you

[@rawatpraveen1000]

Wonderful.

[@abhaykumarabhaysrivastava]

Really helpful 👌

[@Salimsh12y]

Thank you👏👏👍

[@balakrishna2571]

Thanks you! . It is very helpful and the way of explanation is awesome. Can you please make video on microservices as well

[@SeleniumExpress]

Glad that it helped, Bala !

[@rangikarajathilaka]

Hi Abhilash, Quick question. As you describe when we use session.load(Song.class, 1) will not hit the DB till we do something on the proxy object but when we use session.load(Song.class, 1000) which the id 1000 does not exist in the DB, gives ObjectNotFOundExtiontpon, so my question is how does the hibernate know that the id 1000 is not existing in the DB without querying the DB as soon as the session.load(Song.class, 1000) line is get executed?. (does persistence context keep all the id maps or something) Thank you for the video :)

[@yashbhatia9051]

@RangikaRajathilaka .. it won't throw exception until you try to do something with proxy object ... you can create dummy project to test it.

[@sravanchithari13]

Your interview series is damn good and it helps a lot. Expecting many mock interview sessions like this. Early waiting for Spring boot and microservcies interview session

[@jatinsharma3792]

PHD kerna aap n ??

[@naveenchandra6651]

Very helpful

[@damubsr]

Abhilash can you get some mock interviews on java ? Because the last two mocks mostly concentrated on spring and hibernate only

[@vishwashkumarsharma3856]

It was more of hibernate concentrated, rather than java?

[@RAJU9622]

Spring data jpa having more features for execution of different types of criterion for data

[@aakarshitrekhi8071]

Awesome

[@aayush5474]

wow I just started lerning spring this is scary

[@roshisthings7642]

Quick Question: After executing a query, the data fetched from database will be present in cache. After that in database if some of the entries are deleted and we are using same query again. So, this time data will be fetched from cache area then i will be getting deleted entries also from cache which is not correct. In this scenario how can i get the exact data from database. Can you please suggest?

[@tungtranvan1286]

Thank you. I have a bit sad after the watched video. I realized that I can't answer many questions.

[@chaituy2672]

Thanks a lot man

[@SeleniumExpress]

My pleasure, Chaitu.

[@start1learn-n171]

TQ

[@Soccer_Projection]

❤❤❤

[@shankarraj3433]

Nice.

[@mohangabhale5555]

I am using Linux OS Ubuntu so where can I get Hibernate jar files for eclipse

[@meharajfareedy6031]

Hey Abhilash - where is part 2 for this series ?

[@mayuriingale7723]

Hello sir can you share some real time question base on Hibernat and spring boot for interview preparation

[@vickrammark2082]

Nice video😃😃😃😃😃

[@SeleniumExpress]

Thank you, Vickram !! 😊

[@gchitti3855]

Hi Sir, I am not able to find next part of the video .Can you please send me the link..Thanks in advance 😀

[@vamsigangadhar7887]

Abhilash bro y don't u add some more graphical pictures to understand more clearly, even though it's clear explain it will help in easy understanding

[@RanjanSingh-qr1jo]

I don't like coding but after watching your video, I love coding. Thanks you so much.

[@SeleniumExpress]

That makes me feel awesome ! Glad to hear that 😊

[@TrulyLordOfNothing]

you do not need to open and commit transaction for doing a read.

[@utkarshagrawal2287]

Such a useful content.. What salary should I expect as a fresher full stack developer. Btw same skill set as of candidate.

[@sumant2000]

3 lacs is best to ask for, keep interview process on, look for 2nd offer for 4 lacs, 3rd offer for 5 lacs etc.

[@swethak8189]

Ask for 4.25 or even 5.5 if you have the skills

[@krishankantagarwal8640]

Thanks a lot for another mock Abhilash. I attended few interviews recently. I came across few questions on which I need your help. 1. How can we call multiple Rest APIs using one call? 2. Currently maximum application is in monolith architecture. How will you break your monolith architecture to Microservice architecture? Please help us with these concepts. Thanks in advance

[@user-wn2dc1gr7e]

Is the part-II never uploaded?🥲

[@himanshuarya3335]

nice

[@ujjawalpathak2847]

can we also use detach() method at the place of evict() method? session.detach(s);

[@SeleniumExpress]

Hi Ujjawal, Yes sure ! That will work too.

[@PriyankaKumari-yl6vf]

When we will get 2nd part?

[@akhil7936]

Hikaricp we used also jdbc

[@harinathtech]

JDBC is Abstract API you dont want change completely SQL Queries if Database vendor changes like MYSQL to POSTGRES SQL

[@deepakbhagat5458]

I Request you please make video s on mojito junit , I think lots of people suffering from junit and mojito in spring and spring boot application.

[@SeleniumExpress]

Sure, Deepak ! I willl try to record some next month. 🙂 Thank you for suggesting.

[@deepakbhagat5458]

Thank you Abhilash...

[@kingfisher3791]

Bro do u have udemy courses of any content. Really ur content is blowing. Thanks a lot for giving free fundamental tutorials.

[@SeleniumExpress]

You can check out my courses on my website or mail us at [e-mail]

[@anmolone8981]

Should we have to type Hibernate program form scratch in the interview?

[@SeleniumExpress]

Hi Anmol ! I should say no , 90% of times. But you may get MCQ with code write as shown. The code we typed to make sure everyone are on the same page.

[@shirish2005]

Thanks for letting us know you have THE AC at room😂.

[@shirish2005]

Try to keep unrelated talk out of the video

[@ashwinmaheshkar9615]

Hi I'm looking for proxy interview , can anyone help me ?

[@AbhishekKumar-nl1kc]

Hi can you please do a mock interview for me as well

[@sagarbankar4674]

sir can you please make the interview question video which you asked in this mock interview

[@SeleniumExpress]

Hi Sagar ! I have added few answers in the appendix section (find those in the video end). Rest of the answers are perfect !!you can go with our discussion. Also don't forget to do some research so that you can add more points.

[@sagarbankar4674]

@@SeleniumExpress ok thanks

[@aatishsingh7075]

Abhilash sir.....what is inside proxy object if we call load method

[@aatishsingh7075]

Loading means ..from where it load proxy object if load method Don,t fire SQL queries

[@SeleniumExpress]

Hi Atish ! It will be a song object without data. You can think it as a fake song object as the load will assign a proxy in it. But when you will be using the proxy, the proxy will fetch you an original object filled with data, by making a db call.

[@aatishsingh7075]

@@SeleniumExpress got it Abhilash sir....thank u so much

[@sarathchandra941]

Its not clear with the generation type stratergies.

[@sridhardega7540]

Spring boot.....?

[@SeleniumExpress]

Hi Sridhar ! Spring boot interview questions will be out in the next part.