Tricky questions on Java Interface | java interview questions and answers for experienced / Freshers

In this video we will discuss some important interview questions on java interface. As Interface is one of the building blocks for java oops , it is obvious that we can except some java interview questions on this concept.

This video covers various topics like ; java Abstract classes Vs Interfaces comparison , default method, multiple inheritance, diamond problem related to multiple inheritance and some tricky java interview questions and answers related to interface / abstract classes (oops).

Timestamp
---------------------

00:00 - Introduction
03:56 - Abstract class
07:43 - Multiple Inheritance Issue
11:14 - What is java diamond problem ?
15:40 - Introducing Interface for multiple Inheritance
18:04 - Ambiguous Variable Issue with Interface
22:58 - Ambiguous Method ( Multiple Inheritance with Interface)
27:29 - Java 8 new feature - Default Method
36:58 - Calling Default Method in Java 8 +
36:58 - Default Method and Multiple Inheritance
51:09 - Java interview questions on Default method priority (Interface Vs Class)

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[VikashKumar-ttwm]

Hello, Abhilash sir, big fan of you. I watched all your videos and it’s really amazing. You know what, I wanted to switch my carrier from IT due to lack of coding skills . Then I found your Videos on YouTube from spring core to spring mvc (session scope, request scope and many more basic concepts you explained in best way), spring security and now spring could. In next six months I became most valuable performer in my project and promoted to next level. All credit goes to you sir, keep it up for us 😊.

[nguyenquan]

I have watched nearly all of video on your channel, maybe I have addicted the way you explained. Please make more and more video ❤❤❤❤

[sarthaksrivastav]

That's the difference between a experienced person and a fresher one. I have seen your video on interface and abstract classes, but this lecture helps me to know exact need of the interfaces.
Being a fresher I always have the mindset to learn and learn. And trust me whenever I saw your video I really got to know lots of new concepts.... Thanks for sharing your love and experience with us.✨
On 17 Jan I have an interview at ICL and I am just revising the concepts for that.
Thankyou so much.❤️

[azharaktherk]

Kudos to your teaching style.
Abhilash.
More than frameworks basics must be strong so that we can work upon any frameworks.
Thanks for bringing this video.

[TheRebelMe]

Amazing way of teaching concepts and i learnt a lot of concepts in single video .Thank you

[danceayush]

That was an amazing video kudos to you 👏👏
while focusing on Spring, Microservices ..we sometimes forget our basic concepts.

[chintu]

I don't know why it happens....Me aapki video ek topic seekhne ke liye aata hoon or me 4 topics seekh kr jata hu. Feels lucky while watching your videos that i found your channel. Thank you so much😇🥰

[koripellyindukumarreddy]

I really love your way of explanation and the knowledge you share. A Big Thank you Abhilash 🤝 Can you please make a series on Data Structures and Algorithms. 😊

[NBJavaDev]

Thanks Abhilash! You are doing commendable job in explaining the concepts along with code.

[_ritiksharma]

Please make a vidio on composition and aggregation

[yatendra__singh]

You are the best...thank you so much for this🙏🙏

[sunitasingh]

Hi Abhilash, at 38:40, calling default method from random non-static method( inside hello(){} ), we can directly write default method name, instead of super keyword because this call is implementing only single interface. so, it can be -
public void hello() {
m2();
}
Am I correct?

[ajaygosavi]

thank you abhilash for making such valuable videos..plz make more videos regarding core java interview questions

[pushpendrapundir]

interface A{
int a = 10;
}
class Test implements A{
public static void main(String[] args) {
A.a = 20;
System.out.println(A.a);
}
}

Ans : Compile Time error because by default vars of an interface are public, static and final.

[pradipchoudhari]

Happy new year sir 🎉 great to see you again

[All_In_]

Your lecture are so interesting that while like the class get the priority over default method same your lecture takes the priority over my sleep 🥱❤

[DebabratS-cu]

Good explanation sir, kindly make static method in interface too.

[rameshwarirane]

I have watched most of your videos and all of them are super good.Even if videos are on simple topics you explain them so well covering all tricky questions. Especially your videos of mock interviews are so good .All the detailed and from scratch explanation does make complicated concepts easier to learn.All your videos has helped me build my concepts more stronger.Please make more videos on interview questions and answers and also a series of spring boot learning. :)

[himanshupujari]

Sir your explanation ❤️.. please continue this series

[rameshbhivare]

please make videos on Design Patterns it will be more helpfull