Q9 ABSTRACTION IN JAVA

An abstract class can implement an interface.

• TRUE

• FALSE

All methods in an interface are abstract by default.

• FALSE

• TRUE

A class that extends an abstract class must implement all abstract methods of the superclass.

• TRUE

• FALSE

An interface can contain default methods.

• FALSE

• TRUE

A class can extend multiple abstract classes in Java.

• TRUE

• FALSE

An abstract class can have final methods.

• TRUE

• FALSE

Interfaces can contain fields that are not final.

• FALSE

• TRUE

A class implementing an interface must provide implementations for all the methods declared in the interface.

• TRUE

• FALSE

Which keyword is used to declare an interface in Java?

• A. class

• B. abstract

• C. interface

• D. implements

Which of the following can an abstract class contain?

• A. Only abstract methods

• B. Only concrete methods

• C. Both abstract and concrete methods

• D. Only static methods