Lambda expressions

Question 1

What does the test( ) method of Predicate return?

Answer 1

A boolean.

Question 2

Do you need to specify parameter type for a lambda expression?

Answer 2

No.

But if you do, you must put them in parenthesis. 
Ex: foo(newArrayList( ), (List a1) -> a1.isEmpty();

Question 3

T/F: A lambda expression for a functional interface is essentially an implementation of the abstract method in the interface written in a very concise manner.

Answer 3

True.

Question 4

What pieces of the method signature can the compiler figure out on its own for a lambda expression?

Answer 4

The parameter types, return keyword and brackets.

Question 5

What is the basic syntax for a lambda expression?

Answer 5

(parameter list) OR single_variable_without_type -> { regular lines of code } OR just_an_expression_without_a_semicolon