What are the design considerations while making a choice between using interface and abstract class ?

Interview Questions and Answers

Q1. What are the design considerations while making a choice between using interface and abstract class ?

Ans. Keep it as a Abstract Class if its a "Is a" Relationsship and should do subset/all of the functionality. Keep it as Interface if its a "Should Do" relationship.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java oops abstract classes interfaces advanced Asked in 3 Companies}

Related Questions

Differences between abstract class and interface ?

What are the different uses of Interfaces in Java ?

Why can't we have diamond problem with interfaces ?

Why do we need Thread class even in case we execute thread using runnable interface ?

What is the difference between List, Set and Map ?

or

What are the different Java Collections Interfaces ?

What are Marker Interfaces ? Name few Java marker interfaces ?

Can we declare interface methods as private ?

What is comparator interface used for ?

What is the use of runnable interface if we can always create a new thread using Thread class ?

Which of the following doesn't extend Collection interface ?

Search Interview Questions

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.