Functional Intefaces

Question 1

What is an Functional Interface?

Answer 1

It is an inteface that has only one abstract method.

Question 2

What operation does the Consumer interface represent?

Answer 2

Represents an operation that accepts a single input argument and returns no result. Object in and nothing outs.

Question 3

What operation does the Predicate interface represent?

Answer 3

Represents a predicate (boolean-valued function) of one argument.

Question 4

What operation does the Supplier interface represent?

Answer 4

Represents an operation that accepts no argument and returns a result. Nothing in object outs.

Question 5

What operation does the Function interface represent?

Answer 5

Represents a function that accepts one argument and produces a result.

Question 6

What operation does the UnaryOperator represent?

Answer 6

Represents a function that accepts and returns the same type.