Java Collection Interview Questions & Answers | Tricky Q&A | Freshers | Experience | JavaTechie

In this tutorial we will discuss Java Collection frameworks frequently asked interview questions and answers with Example , all the topics we will cover in upcoming tutorial
#javatechie #CoreJava #Interview #QA #Collection
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[@krishnakarthik7198]

I've been on a streak watching your tutorials for my interview prep, you are really helping a lot in quickly brushing up and also learning new concepts. More power to you...!!

[@bhawnarastogi1869]

So far the best and crisp, as it's not just tells theory..it's with example. Great job 👍

[@abhishekgowlikar]

Everyone need this whether fresher or experience, Good Work and Content.

[@vivekkewalramani2736]

this video covered all the key questions asked in interview. Please create these interview questions video more oftenly.

[@dedeepyaamasa4441]

very clearly explained,waiting for more in this series

[@aditipai7289]

Well explained. I especially liked the Hashmap explanation with diagram

[@nandinimani7084]

Just completed watching 😊. Whoever reading the comments section, pls watch his interview question collections videos without having second thought. You will get many questions in interview for sure. Sharing this with my personal interview experience.

[@Javatechie]

Thanks Nandni

[@OracleLand_Official]

Watch full collections interview questions here part 10 to 15.....

[@hanumansays3725]

One of the best interview videos ever seen for Java.
Excellent job. Thank you.

[@santoshkamat6132]

Great tutorial brother. But i believe, for normal hashmap lock will not be applied on whole collection. Lock will be applied on whole collection in synchronised hashmap . And as u rightly said segment wise locking in concurrent hashmap
Anyways you doing a great job with interview playlist in helping so many IT people get jobs during this boom😄

[@RussianCyclop]

Great tutorial on Collections Framework interview questions, very informative, thank you!

[@manojpatil2457]

You are indeed Java Techie sir, Crisp explaination.. 🙌

[@desiengineerashish4908]

This was ultimately awesome👏✊👍
Thanks a lot🙏🙇
Waiting 4 nxt vdo...😊🇮🇳🙏🌻👏👏👌👌

[@suryajena1575]

Appreciate your efforts , thanks for the good job, invaluable contribution to the community.

[@abhijitprusty]

It would nice help if you could make some video related to DSA which are mostly asked during the interview for all kind of technical postions in Java.

[@sushant5800]

Just woow!!! Great content..keep it up man

[@namjitharavind]

Thanks for the video. Concurrent HahMap is not Synchronised. ConcurrentHashMap in Java is indeed thread-safe, but it achieves this without using traditional synchronization mechanisms like locks. Instead, it uses a different approach called "lock-striping" and "compare-and-swap" operations to allow concurrent access from multiple threads without blocking them unnecessarily.

[@arunprasad8261]

Thanks Sir.. Very much helpful in preparation.. Concepts are quite clear and proven

[@ShreyasDangetechie]

very good set of questions covered .. Thanks for the video ..!!

[@sreddy8141]

Basant sir, please start series on data structures and algorithm, its a humble request. Please

[@abhijitprusty]

totally we need this

[@channabasavav1823]

Thank you so much , it is a much needed videos for all job seekers 🙏🙏🙏🙏

[@preethisubramani4817]

Good job !! Ur video helped to understand quickly about collections 👍

[@yusufsaifi3108]

Nice content keep it up ....

[@mubeenkazi]

most beneficial video, all concepts cleared. Will surely recommend

[@Kunalsumanblogs]

Thanks allot for clear explanation ..I have gone through your and Durgesh sir video's ...And I am very confident about comming interview...

[@tanujkumaragrawal4756]

your content is always best sir

[@babuforuful]

Dear JavaTechie Very good awesome videos

[@prakrutijani4205]

Excellent job

[@uvanana.]

Superb ❤

[@rakshamohan]

Great tutorial for quickly brushing up on concepts before interviews. Thank you!

[@AshishYadav-se4db]

Basant sir great content 🔥🔥🙏

[@satyarthsharma8308]

Love it

[@dhruvkaushik7062]

great work brother.....make video on multithreading as well....and other spring and spring boot

[@biswajeetsahoochintu2329]

wow sir sir please go through all interview question of java sir we are waiting for your video sir

[@shubhamshende9995]

amazing lecture sir....

[@prakashp1970]

Superb bro, thanks

[@manindersingh6371]

Nice explaination

[@padmathota7627]

Excellent

[@sibasisdash3984]

Sir your teaching is vary helpful ,, videos are very important.
Please make one single video on spring boot interview questions.

[@sharadsingh2856]

Awesome

[@runthecode_]

Excelente

[@sivamuluguri8142]

Amazing explanation thank you.

[@NareshKumarD107]

Thank you so much.
Very helpful. Pls make more this type vdos on spring,springboot,jpa,hibernate etc

[@PrudviRajD]

Great as always 👍🏽

[@dipalitusharvlogs7252]

The Video is very nicely explained.

[@nagasundar4]

Great

[@ravindranathareddygr8703]

Thanks for the vedio. Request you to do one AWS EKS microservices deployment .(with 2 services which you created in early vedios)

[@routhuaravind6006]

just subscribed !!!😊for sharing the source code and material
tnx a lot

[@mutturajdeval4841]

Well done bro👍

[@chennakesavanaidukakarla4696]

Very useful video

[@aloksrivastav3176]

Amazing content ❤️

[@mikebean.]

This guy deserves a like

[@shemantsingh765]

very well explained Techie✌✌✌

[@nabinkhatiwada4597]

Gurug. Thanks a lot

[@sreenivasareddydwarampudi6034]

Thank you very much sir🙏🙏🙏

[@piyushraghuwanshi7268]

sir naya sikhane ko mila ..

[@mohanr1852]

Good video

[@antest6285]

Very nice explanation and thanks for the information about the interview questions. Is it possible to make video on all datastructures

[@ILuvBilli]

hi basant, just adding one thing here, if we use java 8 then no need to write custom code for sorting , checking multiple values,
System.out.println("");
System.out.println("name and salary basis in java 8");
Collections.sort(list, Comparator.comparing(Employee::getName).thenComparing(Employee::getSalary));
for (Employee e : list) {
System.out.println(e);
}
checking one value,
System.out.println("salary basis using stream");
list.stream().sorted(Comparator.comparing(e -> e.getSalary())).forEach(System.out::println);

[@sreddy8141]

Thanks a ton sir🙂

[@gkreddy7124]

thanks alot

[@kavithareddy6998]

Hi basant, could you please create videos on multithreading and executor framework with examples.

[@jagrutipatil1020]

You are the best 🙏

[@karthibaby7766]

Hi basant , great content could you please post Q&A for spring and spring MVC and boot all together with the practical example , it would be more helpful candidates like me .. thanks

[@007tushard]

Microsevice also

[@Hacks00145]

Yes sir..
Would be helpful

[@Javatechie]

Tusar and hacks I will do this .after saga pattern video

[@user-sr3sr6fc7k]

helpful thank you

[@rabindrapatra7151]

57:53 we are just seeing treemap linearly. but it is not the actual way. treemap entry looks like below: static final class Entry implements Map.Entry {
K key;
V value;
Entry left;
Entry right;
Entry parent;
boolean color = BLACK;
} what is color black here, what does left,right,parent doing.

[@sameer9368]

Bro you are awesome 💖

[@rameshanantavarapu3866]

Great tutorial for quick recap of concepts
Great work , Thanks a lot

[@Javatechie]

Thanks buddy

[@dipakmohapatra9548]

Thanku so much sir😇

[@AnilKumar-dt3sq]

Basant Sir, first of all, I have no words to thank you. You are really doing a great job by sharing this invaluable knowledge and experience with us. However, one small doubt - if Set uses Wrapper class like String, Integer it doesn't allow duplicates. Only for custom classes we need to override equals() & hashcode().

[@Javatechie]

Yes that's correct because all wrapper classes by default override equals and hashcode method

[@Kishore_327]

very very very nice and helpful interview questions .In no other videos i have seen this good content .this helped me a lot in my interviews.

[@Javatechie]

Keep learning buddy ☺️

[@yourskishore5790]

Really love you sir...got few offers due to your valuable teaching 😍😍

[@Javatechie]

Thank you kishore

[@akashtawade9264]

Please upload video on multi-threading tricky questions which asked in interview.

[@avisheksahoo3679]

Good one... as usually very well crafted explanations.

[@Javatechie]

Thanks Avishek

[@satyamkumar-qc1mr]

I generally do not comment on any youtube videos...but this tutorial is so good that i cracked 10+ interviews in just a shorter span of 1 month and got hike of more than 150%.Thanks a lot..and keep uploading such videos for iinterview preparation.

[@Javatechie]

Thanks buddy 😀. Glad to know this

[@damubsr]

Good job,the way of approach is good i.e theory and then code.keep it up

[@Javatechie]

Thanks buddy 😊

[@srivaniy4645]

super content and nice explanation, could you please explain how Get method works internally in Hashmap

[@karamjitsinghsehdev3451]

Excellent coverage of topics. Please make on spring core (same bean name,type) etc.

[@Javatechie]

Yes I will

[@srikanthkusa9615]

Awesome explanation and you design a course structure is excellent

[@Javatechie]

Thanks Srikanth 😊

[@obireddybandi613]

I am eagerly waiting for spring boot and Restful questions

[@debroy1]

Hello, in CopyOnWriteArrayList - can you print the elements again at the end after coming out of while loop as System.out.println(list); That should print the elements in the list including new elements added at the end from the copied list newly created.
Another point here is, the iterator supports to delete an element using remove() in case of an ArrayList, though it does not support to add any new element to that. I believe remove() also works in similar concept - creates another copy of original list.

[@amanabhishek8998]

U rocks again.
Please make one video of Multithreading interview qustions for more than 5years experienced , in youtube hardly to find any tututorials

[@Javatechie]

Thanks buddy these questions also asked in 8+ experience person

[@amanabhishek8998]

​@Javatechie for collection I have following this one or I can say , to start any new topic I would search your videos first that much believe we people have becoz addition to core concept u are also including project examples which helps us to form scenarios in interview😊

[@Javatechie]

Thank you so much Aman for following Javatechie and appreciate your word 🤗

[@dhanyav5675]

Hi Javatechie, Thank you so much. Your videos have really helped in my interview prep, I have 2 job offers now
Your videos are informative and really useful

[@Javatechie]

Cool buddy. Good to hear this

[@shareequasiddiqui4948]

Please make video on spring and microservice interview questions

[@GOPINATH-xb3im]

First i thought this is going to be the same as always like difference this with this & difference this with that blah blah sh*t, but I'll say this is best Q&A ever of collection. Thank you sir

[@Javatechie]

Thanks buddy 😌

[@ashokkumarrout688]

Nice Video as always good contents.

[@OracleLand_Official]

Watch full collections interview questions here part 10 to 15.....

[@pratishrutipanda6461]

You explained excellently

[@OracleLand_Official]

Watch full collections interview questions here part 10 to 15.....

[@uma4525]

Good content. please upload Multithreading interview questions as well.Thank You!

[@Javatechie]

I will

[@MaheshAnand1995]

Please make a video on multi threading interview questions.

[@aadiraj6126]

Basant sir, I think even there is no guarantee of showing modification as output by ConcurrentHashMap, it depends upon which segment are modified as Iterator is forward moving cursor & cant go back.
Now suppose, during iteration if we update or added some segment values where iterator had already visited earlier, now ConcurrentHashMap wont able to display those values. In our example, Entry may be added at later segment than Entry and Entry thus its showing in output as Iterator able to access it. 🙏

[@stephenk297]

Basant sir,your content very informative Thank you. please make video on spring spring boot and microservice interview questions and answers.

[@Javatechie]

I will

[@srikanthchowdary8595]

Thank you very much for the video and great explanation

[@Javatechie]

Thanks Srikanth

[@srikanthchowdary8595]

@@Javatechie hey can you post a video on real time project example of using threads if possible!

[@amolgangadharpaydalwar4279]

hi sir this is very good video and helpful also but give more questions about collections and also create new video on spring and springboot interviews questions also its also very helpful

[@Javatechie]

Yes I will

[@jyotimahajan997]

Request you to create spring and design patterns also

[@RichaBehera129]

Please bring multithreading and exception interview questions

[@prisinha]

44:44 Collections.synchronizedMap(map) and synchronized HashTable both does not have segment level locking mechanism.

[@KunalKrishna]

42:47 note there can only be 1 entry with key=null, however, there may be several entries having value = null

[@parimalamparimalam10]

automation testing also will
ask same
way

[@PradipYogi59]

Please create internal implementation of collection , like how it internal works..

[@pramodkumbhar1175]

Please make one video on multithreading interview questions in java (Future vs CompletableFuture)

[@Javatechie]

Okay

[@deepakgowda7292]

awesome explanation sir thank you so much sir ❣ sir which company you are working in ?