Java Interfaces - January 24, 2023

A class can implement more than one interface.

• true

• false

A class can extend an interface.

• true

• false

An interface can extend an interface.

• true

• false

Interfaces can have constructors.

• true

• false

All members of an interface are public by default.

• true

• false

Why would you use an abstract class over an interface.

• Can provide additional methods with code already implemented

• You have multiple subclasses which need to perform the same implementation of a task

• All of the mentioned

Which line will cause an error.

• Line 1

• Line 2

• Line 3

• Line 4

______ inheritance is achieved using interface in java.

• single

• multilevel

• multiple

• hierarchical

Members of interface are always declared as const, their values are final.

• true

• false

Methods of the interface are ……………in nature

• none of these

• variable

• abstract

• static