Java 8 New Features Interview Questions And Answers( Live Demo) Part 2 | Code Decode

In this video of Code Decode we have covered Java 8 New Features Interview Questions And Answers( Live Demo) Part 2
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Java 8 Interview Questions Complete Playlist :
• Java 8 Interview Quest...
This video covers java 8 new features. Interview Questions Based on tricky concepts of those new java 8 features and Java 8 Interview Questions and Answers.
Few questions we covered like:
What are defaults methods?
Default method is a way for adding new methods to the interface without affecting the implementing classes. Hence with this new feature Java people defended many compile time errors that may arise due to unimplemented methods of interface.
The use of these default methods is “Backward Compatibility” which means if JDK modifies any Interface (without default method) then the classes which implement this Interface will break.
On the other hand, if you add the default method in an Interface then you will be able to provide the default implementation. This won’t affect the implementing classes.
Q) Is it necessary to override default methods of interface in java 8?
Default methods have dummy implementations.
Implementing classes if ok with dummy implementation then use dummy implementation of default methods
If not satisfied then they can override and provide their own implementation.
Q) Is the default keyword one of the access modifiers?
Default is not the access modifier like public or protected or public
Q) How to override default methods?
You can override the default method by keeping the same method signature (name + arguments)
Removing default keywords because in class default keyword is used in switch case to denote default case if no previous cases matched. So you cant use the Default keyword in Class
Adding Public as access modifier as in java 8, by default all methods are public so in child, u cant reduce the visibility of overridden default method.
Giving our own implementation.
Q) Why Static methods were introduced in JAVA8
Only reason for introducing static methods in the interface is that you can call those methods with just interface name. No Need to create a class and then its object.
Since Interface can never contain :
Constructors,
Static blocks,
Nothings are costly in terms of memory and performance.
Hence we don’t need to create an object and hence if you have everything static, then for interface rather than class
( You have this flexibility only after java 8, before that you need to create a class)
Q) Are Static Methods available to implementing classes by default?
Static methods are not available for implementing classes.
They are not default methods. They are static.
Hence you can call these methods using the Interface name explicitly from the implementing classes as implementing classes won't have access to these methods directly. (This is the disadvantage of static methods of interface that its not available to implementing classes.)
Java 8 New Features Predicate, Function, Consumer, Supplier, Streams, Parallel Stream's and many more topics.
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[@cybercool8613]

This is gold!! Brilliant video👌👌

[@CodeDecode]

Thanks 🙂👍

[@mdsaddamhussain9623]

it's amazing to watch these short video and refresh all concept before the interview, please create the next part of it.

[@CodeDecode]

Sure will upload soon 👍

[@priyankabawdekar8253]

Hi team CodeDecode. Just wanted to let you know your videos are absolute GOLD! I used to just watch your videos and practice the concepts explained. Within no time i was so confident that I cracked interviews of multiple companies in 1 go. Extremely useful , well explained, crisp, informative and very well put together videos! Keep up the good work. God bless! THANKYOU AGAIN!

[@CodeDecode]

Means a lot to us Priyanka. More power to you❤ well deserved many congratulations on cracking interviews👏👏

[@shivashankarsr7377]

Huge effort is needed to create these kind of videos. Kudos to the instructor!! Keep going !!

[@CodeDecode]

Thanks shivashankar

[@yuewu3888]

Thank you so much for concepts and demo. This is an excellent combination. Keep going!

[@CodeDecode]

Thanks for the nice words 👍

[@smilysarat]

She is really very straight to the point with good content and practice examples. No waste of time. Point sticks in the brain.

[@CodeDecode]

Thanks a lot Smily 🙂👍

[@harithareddy7119]

It will be helpful for us if u make a seperate video on concepts and interview questions. The way you explain is awesome. Can't thank you enough for your efforts.

[@CodeDecode]

Thanks for the nice words 👍

[@maryhilda5]

I have attended interview only by going through your videos and I cracked it! Thank you for making all these videos and putting so much efforts!

[@CodeDecode]

Congratulations🎉🎉🎉🎉🎉 Mary. Well deserved 👍👍🎊🎊. Keep learning keep shining ⭐✨⭐✨⭐✨⭐✨

[@islamiyazindagi6178]

Wow congrats 👏..
I am also following..May I know which company that was plz??

[@srinivasacharya4695]

Thank you so much for this wonderful explanation. Your videos are really helpful, some way your videos are really having a good impact on those who want a clear explanation. Hats of to you ma'am

[@CodeDecode]

Thanks Srinivas 🙂.

[@venugopalreddychalla9159]

Till now I didn't understand use of default method in the interface but with your explanation i got the reason for it. Thank you so much for it.

[@CodeDecode]

We are glad 🙂🙂👍👍. Thanks for the nice words. It motivates us to put more efforts on videos🙃

[@sauravmaity4681]

Thank you mam for these videos. I am a java resource but new to Java 8. Wanted to have an idea of Java 8 before attending interviews. this video helped a lot.

[@CodeDecode]

All the very best for your interview Saurav. You will surely do good in your interview 🎊🎊👍👍

[@arunkumarchinthapalli2005]

Its helping me a lot and your explanation is very clear. Thank you!

[@CodeDecode]

🙂🙂👍👍thanks Arunkumar

[@prathameshpatil5373]

Very helpful video's.. covering basics and also getting prepared for interviews

[@CodeDecode]

Thanks 👍😊

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Really impressed and addicted to your teaching style,the best part is you are showing the concepts through demo.....Commendable job and you are truly educating all of us with your teaching skills.....thank you so much for your dedication and hardwork

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Great explanation what people need

[@bobbycv64]

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[@CodeDecode]

Thanks a lot 🙂🙂. We are team of some people collectively known as code decode. That's about us. We would like to know about you too.👍👍

[@TheSunnyday16]

I just subscribed to your channel and looking forward to more interview questions on java 8.

[@CodeDecode]

Sure 👍

[@AjitDas-hf9lu]

Thank You So Much after following your vedio i have covered every single points keep doing this please

[@CodeDecode]

You're welcome Ajit

[@sripuji6670]

Watching video is worth it. Thanks 👍. Keep up good work.

[@CodeDecode]

Thanks Sri 👍

[@crazeeealgorithms3236]

Thank You for these tutorials, they are helping a lot...

[@CodeDecode]

Thank you ......

[@sreerekhamenon1164]

Good content.. i just read the tutorial from internet but this video really helped to understand the concepts in depth.

[@CodeDecode]

Thanks Sreerekha 👍🙂

[@divye5738]

Never came across such clear and sharp explaination of concepts! Keep it up !

[@CodeDecode]

Thanks 🙂🙂

[@rishabhgupta9717]

To the point explanation.
Best brushup tutorial

[@CodeDecode]

Thanks 👍

[@kirushnashirre6791]

Your explanations are great!! please make a video for other new Functional Interfaces too

[@CodeDecode]

They are almost ready will upload that soon 👍

[@commonman8540]

Brilliant video. thanks.

[@CodeDecode]

🙂🙂👍👍

[@valeriacervantes1909]

so helpful, thanks!

[@CodeDecode]

Thanks 🙂🙂

[@gopisambasivarao5282]

Awesome explanation.
Appreciate your efforts!

[@CodeDecode]

Thanks

[@AsadMalik999]

One word for all the videos ....... "kamal teacher" MashaAllah

[@CodeDecode]

Thanks 👍

[@sreeguru6377]

wonderful video to understand java8 easily . thanks a lot :)

[@CodeDecode]

Thanks for the nice words

[@sushmitasushmita6938]

Please cover the concept then interview questions. ... The way you explain is awesome thank you 🙂

[@CodeDecode]

th-cam.com/play/PLyHJZXNdCXsdeusn4OM33415DCMQ6sUKy.html

[@manojyadavofficial8535]

Wonderful content and very good presentation.. Thanks

[@CodeDecode]

Thanks 👍

[@NarenJavaTech]

Very well explained. Your videos are really really helpful

[@CodeDecode]

Thanks 🙏👍

[@DineshSingh-jt9no]

Superb article for Java 8 new features

[@CodeDecode]

Thanks.....

[@aakashyadav9117]

thank you for creating these videos 👏

[@CodeDecode]

Thanks Aakash 🙂👍

[@aditigupta5324]

to the point videos.....can you please make some videos on marker interface

[@sulavagarwal3561]

Very well explained. Your videos are really really helpful. Request to please also make a video on Junit and Mockito as well.

[@CodeDecode]

Sure Sulav 👍👍we will do that 👍👍

[@archanayuvaraj8326]

Anyone can learn even tough topics with your teaching 🥰

[@CodeDecode]

Thanks Archana🙂🙂

[@sahilarora333]

Please create interview questions for Streams, Predicate etc.
Thanks for such great content 🙏

[@CodeDecode]

Sure 👍. You can expect the next video tomorrow.

[@ravijai4645]

Hey I am following all your videos ..... good to refresh my memory. Can you do more videos on micro services, Gcp, and please provide some real time examples and lifecycle.....also some content on how applications gets deployed/runs in cloud and on prem in real time will be help full to us

[@CodeDecode]

Sure will create on them too.

[@adityamaheshwari6132]

Please create video for interview questions on Streams, as many interviewers interested in Stream API.

[@CodeDecode]

Sure 👍

[@sheikhziya5048]

you are doing great work mam. all the videos of interview related is good to recall or newly to understand with your practical teaching style.but can you just like sort your interview playlist according to an order base like core,advance, framework,database so that it will be more convenient to acces such great content.

[@CodeDecode]

Yeah we really need good playlist sorting Man. Nice catch. Sure we will 👍😊😊

[@Aaru_28264]

Great explanation thank you mam🙏🏻

[@CodeDecode]

Thanks

[@gopikrishna8120]

Hi Madam,
Thank you for detailed explanation.
One doubt is if we define static methods in class, we don't need create objects to call it. So creating them in interface how it will improve performance? And I like to use Utility methods from anywhere in project but in this scenario we need to implement interfaces to access them.

[@afrida6672]

Nice explanation. Thanks ❤

[@CodeDecode]

You're welcome

[@SandeepAS-ov3fk]

excellent thank you..kindly create video in predicate consumer supplier and function and parallel stream

[@CodeDecode]

sure sandeep we will create one soon

[@Vithal_Nivargi]

awesome explanation way with practically Thank -you mam, please keep it up making video on some adavance technologies like spring boot and microservices etc..........

[@CodeDecode]

th-cam.com/play/PLyHJZXNdCXsdXxY8wupiLenux2Yafn1lN.html

[@CodeDecode]

th-cam.com/play/PLyHJZXNdCXsd2e3NMW9sZbto8RB5foBtp.html

[@user-iu2iy2kb7i]

Yes, we need predicate, function, consumer, supplier, streams, and parallel streams explanation.

[@UmmakaJagadish]

u r excellent madam in detail perfectoooo

[@hariprasadracharla4625]

The way of your explanation is awesome and please make a videos on interview parts..

[@CodeDecode]

Ok 👍

[@josephpudupermanil704]

You cover all points really good effort Mam.. keep rocking..

[@CodeDecode]

Thanks Joseph 😃

[@avneetsingh2010]

Feeling motivated after going through your video!

[@CodeDecode]

Thank you so much

[@bimalpanigrahi4177]

i really appreciate your efforts to make our life easy :)

[@CodeDecode]

Thanks Bimal. Always happy to do that🙂👍

[@Managoli100]

It's Very nice and helpful 👍

[@CodeDecode]

Thanks Rajashekhar....

[@yuewu3888]

Love to see if you can cover Predicate, Function, ....Parallel Streams. Thanks

[@CodeDecode]

Sure will cover soon 👍

[@TechExplorerStudio]

please create video on predicate function consumer and supplier and all .... Thank you so much for making these kind of video and every thing if you will talk on the basis performance and time duration like if we are calling stream foreach or map how much time it will reduce and how much performance it will improve. It will help us on development and we can start thinking like an architect...

[@CodeDecode]

Sure. Will do that in next part 👍

[@kaushlendrakaushal8729]

great...explanation

[@CodeDecode]

Thanks 👍

[@MVDCREATIONS]

please create interview questions are all topics in java. i have watched so many videos till now but your explanation is superb

[@CodeDecode]

Thanks 👍☺️

[@diwakar.singh_official]

It's awesome content.. Please keep posting more topics.

[@CodeDecode]

Sure 👍. You can expect the next video tomorrow.

[@chaitutom5789]

Great videos lot of stuff

[@CodeDecode]

Thanks👍👍

[@piyushrayrikar]

Keep up good work.

[@CodeDecode]

Thanks Piyush......

[@nagendraprasad7673]

In case of the diamond problem, we have to invoke the interface default implementation thus making the default implementation in the interface mandatory and not optional. Is there a way to avoid this?

[@pankaja007]

Hi @code Decode. It's really amazing you simply elaborate all thing. Understand really well. Please request you to upload the Microservices interview questions and answers.

[@CodeDecode]

Sure Pankaj, we are planning for micro services soon 👍👍

[@pankaja007]

@@CodeDecode Hey Thanks..

[@CodeDecode]

Your welcome Pankaj 👍👍

[@rohit190388]

Excellent expalaination

[@CodeDecode]

Thanks Rohit👍

[@AmeyaNanarkar76625]

Very nicely explained in least time

[@CodeDecode]

Thanks 👍

[@nikhilpawar7876]

Great great great work guys👌👌👌

[@CodeDecode]

Thanks Nikhil

[@nitinavhad498]

Concepts are really well explained

[@CodeDecode]

Thanks Nitin 👍

[@ManvendraSingh-xh2ry]

love!!

[@CodeDecode]

😊😊

[@trafotrymisspccreations1131]

Hey dear kudos to your work...!!! very nice explanation. keep posting new videos.

[@CodeDecode]

Thanks 🙏

[@sharmarahul17]

Excellent👌

[@CodeDecode]

😊👍

[@sanjeetkrsinha]

It is the best tutorial. Can you please add detail on Predicate etc too

[@CodeDecode]

Java 8 Interview Questions(New Features): th-cam.com/play/PLyHJZXNdCXsdeusn4OM33415DCMQ6sUKy.html

[@AmitSingh-hv3md]

That's great. Can you put this practicals into github?

[@karthiksundaram544]

Superb demo

[@CodeDecode]

Thanks Karthik

[@Rajshimishra123]

You helped me a lot

[@CodeDecode]

We are glad to do that Shilpa 🙂👍👍always

[@SANDEEPSINGH-pi2gg]

Your explanation is very good yr. Keep it up 👍

[@CodeDecode]

Thanks....

[@praveenkumar9959]

Very useful

[@CodeDecode]

Thanks Praveen 🙂🙂

[@shrutiambashtha6196]

Best channel ever!!

[@CodeDecode]

Thanks shruti

[@paridadeepika]

Nice video!!

[@CodeDecode]

Thanks!

[@sonalpoddar7801]

Hi Mam, better go for the interview questions directly. You explain very well while answering the interview questions while giving the live demo.

[@CodeDecode]

Thanks for the nice suggestion 👍

[@nagarajtulasigeri8305]

in less time we gain more knowledge, Please cover the rest of the concepts mam.

[@CodeDecode]

Sure will cover soon 👍

[@manojyadavofficial8535]

Java 8 is fine but could you please make video on JAVA executor framework?
Along with Linked list data structure and their java implementation..

[@mrindian7422]

Super explanation

[@CodeDecode]

Thank you

[@shashidharnmrec]

Thanks

[@CodeDecode]

you're welcome shashi. Thanks for the support

[@thrivenipogu7521]

Best teacher... 🙏

[@CodeDecode]

Thanks Thriveni

[@sukunkusum1720]

Hi Team CodeDecode! These videos are really useful. When we will get the further part of the video like optional keyword...

[@CodeDecode]

Hi Sukun we will upload it soon

[@tushaarkd1915]

best explanation

[@CodeDecode]

Thanks a lot Tushaar 🙂🙂

[@bvreddy09]

Very nice explanation. Is it possible to share that PPT with us. Thanks in advance.

[@vigneshgvs]

For a class: If no access modifier is specified for a class or its data members or variables, it has default (package-private) access.
For an interface: If no access modifier is specified for an interface, the interface itself is public, and its methods (including default methods) are implicitly public. This means that they are accessible from anywhere.

[@gajendrathakur4833]

Superb

[@CodeDecode]

Thanks

[@nivedaravi2241]

Super Thanks

[@CodeDecode]

👍

[@ashokrana273]

Very Nice

[@CodeDecode]

thanks

[@shankarpatilsp]

Thanks.! please make video on Stream API with examples.

[@CodeDecode]

sure will upload that too soon 👍

[@sonisinha7622]

Please create a video on concepts of Predicate and functions

[@CodeDecode]

Sure 👍

[@Deepakkumar-et9ep]

Nice explanation👌

[@CodeDecode]

Thanks

[@saidashaik3537]

Better as interview questions 👍

[@CodeDecode]

Thanks 👍

[@MrSid2279]

Please kindly cover the practical questions which come in Stream API taking an example class say Employee. Also kindly cover Optional class.

[@CodeDecode]

Sure next will upload that soon 👍👍

[@satyajeethukkire6099]

Ma'am first of all these videos are gems. Thank you for straight to the point explanation. Ma'am just a question where to get these slides???

[@CodeDecode]

Thanks 😊. We apologies for not being able to share PPT because of copyright issues. These ppt have links to blogs, books we refer. Sharing them will give us copy right notices.
Really sorry for inconvenience caused

[@dineshsolanki1666]

static methods reside in stack memory whereas Implementations of interface are classes which will need to be instantiated to be used and once instantiated, will be stored in heap memory. that is one of the reason static methods are not available after instantiation of Implementation class. This concept is similar if occurred in classes.

[@mukulverma8396]

Please create interview questions video and skip the basics, by the way thanks a lot for such informative content

[@CodeDecode]

Thanks 👍

[@nitishchaudhary7777]

Thanks for sharing knowledge. I have query for you about functionaldemo interface. I think, this is our own functional interface created and having default method only (no single abstract method).But as per steps to create our own functional interface. There should have exact one abstract method. Could you pls tell w/o abstract method and having default method is right ?

[@CodeDecode]

Functional interface can have only and exact 1 abstract method. Can have any no of default methods. If you extend any other interface, it's abstract method is also considered. Check if functional demo extends any other interface?