Functional Programming

Question 1

What is a lambda ?

Answer 1

An anonymous function

Question 2

Predefined Functional Interface - Predicate

Answer 2

Generic type
Check a condition, returns true or false
Primitive specializations exist
Predicate<T>
T-> boolean</T>

Question 3

Predefined Functional Interface - Consumer

Answer 3

Accepts an argument and returns nothing
Consumer<T>
T-> void</T>

Question 4

Predefined Functional Interface - Function

Answer 4

Accepts type T, Returns type R
performs a function
Primitive specializations exist
Function<T,R>
T->R

Question 5

Predefined Functional Interface - Supplier

Answer 5

takes nothing but supplier something of type T
Supplier<T>
()->T</T>

Question 6

Predefined Functional Interface - Unary

Answer 6

Accepts type T and returns a result of the same type
UnaryOperator<T>
T->T</T>

Question 7

Predefined Functional Interface - BinaryOperator<T>
(T,T)->T</T>

Answer 7

BinaryOperator<T>
(T,T)->T</T>

Question 8

Predefined Functional Interface -
BiPredicate

Answer 8

BiPredicate<L,R>
(L,R)->boolean

Question 9

Predefined Functional Interface -
BiConsumer

Answer 9

BiConsumer<T,U>
(T,U)-> void