ABSTRACT AND INTERFACES

Question 1

Interface

Answer 1

all methods in interface are abstract

Question 2

True or false

Classes CANNOT implement more than one interface

Answer 2

False

Question 3

what are the access level of fields in interface

Answer 3

public, static and final

Question 4

interfaces do not have constructors ( abstract classes do as these constructors are usually used in subclasses)

Answer 4

Abstract classes can have constructors, but they cannot be instantiated directly. The constructors are used when a concrete subclass is created.

Question 5

Interface with single abstract method is called

Answer 5

Functional interface