Top 20+ Java 8 Interview Questions & Answers [Most Important] | JavaTechie

In this Tutorial, i have provided the Most Important Java 8 Interview Questions & their Answers with Code Examples & Explanation:
Note : Demonstrate few programming question using java 8 stream and CompletableFuture
📚Agenda 📚
(01:52) Functional Interface QA
(17:35) Lambda Expression QA
(32:20) Stream API QA
(01:08:07) CompletableFuture QA
#javatechie #Java8 #InterviewQA
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[@firozalam2749]

he did so hard to make us understand . Love your work bro . Your intention is to teach . Love you 1000 times. India should be proud of you.

[@kapilausarmal6300]

I finally got it, the whole JDK 8 and its features with examples. Thank you so much bro for such an informative video. Please Keep it up ...!

[@kshipra901]

Wow..He sounds so genuine and Hard working ..hats off to his efforts !! Keep going !

[@sudhakarvenkatraman4432]

So much of information in one video to manipulate data in efficient manner using java 8. It's very helpful to brush up w.r.t to interview.

[@avirocks4u]

This is a very detailed explanation for someone who just started to learn Java 8 and above. Very helpful! Waiting for the next video for Java 11 and above interview questions and concepts 😊

[@jagadeeshbaskaran4881]

Great explanation with examples. Thank you !!!

[@nithya6361]

Hi Javatechie, I got a job with a 15lpa package.. it's just because of seeing your videos.. thankyou so much..

[@Javatechie]

Congratulations buddy, i am so happy to hear this and wish you good luck for future

[@kishorkumrbendi]

explained each question with best suitable examples.. well explained.. thanx a lot..

[@kanchanam5899]

You are a great teacher..Thank you sir :) The way you tell "Dont worry" really makes us feel the topics to be easy and understandable.

[@ashishsahu1310]

Crystal clear explanation as always. Thank you so much for such nice content with interesting explanation.

[@bundayyolayinka3352]

Thanks alot for this resource! The dedication, hard work, clarity and explanation is very much appreciated.

[@shubhamverma5645]

I got exact questions in an interview on lambda, functional interface and Stream API. So relevant!🙂

[@sattibabuchittala6228]

Amazing Sir Thank you for providing such an valuable information with free of cost.

[@skasif4476]

I am wondering how can a teacher be so perfect in teaching… thanks sir 🙏

[@harshitsingh4767]

"Why this guy is crying ?" 😂 Great Explanation .. Thank you !

[@usha973]

God Bless You Sir. In the ocean of data this is the first time I found subject as so clear and clean. Very useful. Many Thanks for all of your videos.

[@ganeshr5244]

Really after seeing this video I got a crystal and clarity on Java 8 different methods ...and also watching other videos which is more help full to got the concept very clear ..thanks bro

[@amithk3295]

Subscribed this channel with in 1k subscribers , happy to see your growth Mate. This helped me a lot. Thanks a lot for sharing the great and precise information. Keep going ❤

[@Javatechie]

Thank you so much Amith for supporting and following Javatechie from the beginning

[@dheerajkumar-bp8zr]

Thank you so much bro for such a valuable content. Please keep it up ...!

[@asifaindi1388]

best best best explanation, even I got these questions, thanks a lot!!!

[@shubhammanecr7]

Thanks for posting this, sir! Full dose for java developers....

[@srivasuprada]

Few videos explain only the presentation. But you switched in between presentation and practicality. That helps us a lot to understand clearly the concepts. Thank you :)

[@Javatechie]

Thanks buddy keep learning 😊

[@akankshabaisane303]

Thx Sir,u have explained us many times so that v can get the concept.

[@codewithRahulYnr]

Such a meaningful and needful video .. carry on sir 💯

[@monsterhuntergo]

Amazing! I have learned new things.. Thanks so much for sharing..

[@saichaithvik]

Before Java 8, interfaces could have only abstract methods. The implementation of these methods has to be provided in a separate class. So, if a new method is to be added in an interface then its implementation code has to be provided in the class implementing the same interface. To overcome this issue, Java 8 has introduced the concept of default methods which allow the interfaces to have methods with implementation without affecting the classes that implement the interface. The default methods were introduced to provide backward comparability so that existing interfaces can use the lambda expressions without implementing the methods in the implementation class. Default methods are also known as defender methods or virtual extension methods.

[@Prapti.p]

I wrote down your comment in my java 8 notes lol

[@shubhambhake6903]

great explanation, thank you for video..!

[@sanjayreddy1119]

Thank you for sharing your knowledge my friend

[@malleswarrao3887]

Excellent 😊 Explanation Brother . As of now I am afraid of Java8 features now , I have an idea and good knowledge on Java8, you given so much confidence.. Thanks a lot ....

[@kumarashish1657]

I become a fan of your explanation technique. The way you explain Lambda expression, I will never forget. Thank you and keep doing great work.

[@Javatechie]

Thank you for your word 😊. Keep learning 👍

[@shilpasingla1739]

Good content and good way of presentation which makes one to watch full video..you are able to hold user for long time

[@AbdelrahmanMoussaAbuOuf]

This is just brilliant. I loved your video and the effort you put into it. You also explained things in an ordered matter so that we can comprehend each point in the presentation. Great work man !

[@Javatechie]

Thanks buddy 😊

[@sudhanshusharma9123]

Thank you so much Sir for providing this resource, along with the complete paylist for Java/Springboot related questions, can't get such refined and explanatory resource anywhere.

[@kottikishor6416]

YOU'RE SUPER BRO,THANKS FOR THE SHARING THIS KIND OF JAVA VIDEOS.

[@harinathreddy1379]

Nice Video to understand JAVA8 Features Thanks bro

[@maarivb944]

Great for interview preparation 👍👍👍

[@abhishekwasave9010]

wonderful explanation of the all the question .. thanks for such a lovely video .. it helped me alot in understanding the java 8 features quickly with examples 👍🙌

[@shraddhamahajan6474]

Q

[@shraddhamahajan6474]

±+

[@shraddhamahajan6474]

.qq.

[@m.s.d6365]

Really i feel happy after watching this video. Good content🙏🏻

[@seatconnect224]

Last task could be modified to show how synchronization resolve multithreading issue when some class field going to be modified from different threads. But any way thank you for great video and examples!

[@rajeshlohar6884]

Map charsMap = Stream.of(name.split("")).collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));

[@PappuKumar-ho3ek]

Great 👍 bro....really useful video...keep it up

[@roomphoto5110]

Thank you so much, I wish I would have seen this video sooner.

[@shubhanshusharma7457]

love the way of your teaching..

[@manish436]

I would like to add one more point in disadvantage of using functional programming/lambda exp - "functional style compromises encapsulation".

[@MrSajjadgul]

That is inherited drawback from anonymous methods.

[@ajay263557]

Thanks a lot for such information and would like to request you if possible make same videos on concurrency package

[@navinr8160]

Great explanation 👍

[@Samsungs-ug4ht]

thanks for all the amazing explanation it was very helpful & its fun when you say "why this guy crying" 😂

[@prabhuldasds3518]

Thank you Sir for the awesome content.

[@shubhambhopale4603]

You are GOOD. Thank you!

[@raveedevan]

Best 👍. Please upload as many concept as possible

[@phanibuddi5965]

what a commendable video bro , your way of teaching is excellent.Even kid can also understand it.Once they watched your videos they could not do interview also.

[@Javatechie]

Thanks buddy 😊

[@flowchart5471]

Vasanth...Can you please prepare one video for Java design Patterns? Lot of things are available , but need in your format.

[@saichaithvik]

Java interface static method helps us in providing security by not allowing implementation classes to override them.

[@kiranlulla6540]

Amazing job!!

[@pratishrutipanda6461]

Nice content 👍

[@adarshverma3372]

Very detailed and good topics explained

[@mDSS4ICCM]

Thank you very much!

[@Asjad321]

Please make Q&A for JAVA 11 & JAVA 17

[@ranganathchowdary2106]

love you guru...super content.

[@noors3417]

tq bro ur explanation is very understandable and very helpfull

[@dipesh2359]

Very nice. God bless.

[@jsiddiqui]

Really great job.... awesome work...

[@chetanbhandari3033]

Thnx a lot 💓

[@kayalvizhidas6834]

Hi Bashsant Sir you told that you post interview question for microservices.Expecting that video eagerly.plz post

[@Javatechie]

This coming July month I will upload buddy

[@maheshbabualluri9642]

The best❤

[@vaishnavi_cholli]

Good Explaination

[@sanjukoujalagi5800]

Thanks for the video.

[@ANKITCHOUDHARYankitkrchy]

Much waited for this... Thanks

[@neha6000]

Thank you basant ❤❤

[@abhishekabhic737]

thank you so much for this video

[@bullsbearsfight]

awesome explanation

[@user-ng6xj8pk2u]

Good video!

[@gopi54655]

great info .. Can we add questions on Threads too I don't see in any videos...

[@saikrishnaanantula]

One doubt object class is parent of all java class but not parent of all interface so in that case how comparator inherited equals from object class.

[@sumansaha4538]

Thanks , This is great video.

[@___vandanagupta___]

U are an amazing teacher

[@RaviVerma-bg6ul]

awesome

[@santoshkamat6132]

Bro JP Morgan need not interview you only. Your KZbin channel's superb allround playlists are itself a biggest credential for your selection 😄

[@Javatechie]

Thanks Santosh for your word. I faced this question in jpmc only 😜

[@ILuvBilli]

@@Javatechie very true santosh, jpmc should watch basant's Playlist, that is more than enough for selection

[@Javatechie]

Ha ha thanks bro ☺️

[@shamkantdesale8994]

Great explaination

[@satyabatigoswami1735]

Great video

[@chitrambalam8509]

Great information!!!

[@abhishekhail6682]

Nice video sir ❤️

[@mandarchabukswar4528]

Ur work is awesome

[@homerSImpsonss]

Thanks a lot brother

[@user-pp8sv5rx2f]

Could you also create a video on your Walmart interview experience? The whole process actually would really be a great insight and helpful

[@Javatechie]

Okay buddy I will create definitely

[@riki2404]

Thanks a lot.

[@bhatnagarcapital]

I love you ! You are awesome !

[@dhineshs6210]

Good Explanation !....

[@prashanthreddy-sd9ju]

Thank you sir 🙏

[@venkatasubbaiahchoppa1365]

Excellent explanation. However you missed Map and Reduce!

[@santoshkumarverma8443]

Good content. Keep continue.

[@jagrutipatil1020]

You are the gem☺️

[@13success66]

Thank you sir

[@BeingAaradhyaa]

Thanks!

[@007tushard]

Thanks

[@good_eats876]

"this line is crying" 🤣

[@richat946]

Ur video is alz my fav list..sir ,Make videos on 3-4yrs exp candidate interview ques on springboot and microservices.

[@Javatechie]

Sure will do that Richa . Did you gone through my other interview QA session if not please have a look

[@richat946]

@@Javatechie sure sir 👍

[@rishiraj2548]

Thanks 🎉

[@ethangoodman7988]

In your program of printing even odd numbers from two thread it's not giving 1 to 10 output sequentially always in my machine even thread gets started first print 2 then print 1. We might need extra synchronisation here to ensure that first odd thread gets started

[@manivannankarunanithi8272]

who are you bro? i never seen a tutorial like this.. you are covering in and out. Excellent bro. Thanks for all your contribution.

[@Javatechie]

Thank you so much for appreciating it. Keep learning 😃