1. What is a functional interface? Select all that apply:

• 1. A collection of functions
  2. An interface that has only one method
  3. Any interface that has only one abstract method
  4. Any library written in Java

2. What is a lambda expression? Select all that apply:

• 1. A function, implemented as an anonymous method without modifiers, return types, and parameter types
  2. A functional interface implementation
  3. Any implementation in a lambda calculus style
  4. The notation that includes the list of parameters, an arrow token ->, and a body that consists of a single statement or a block of statements

3. How many input parameters does the implementation of the Consumer<T> interface have?
4. What is the type of the return value in the implementation of the Consumer<T> interface?
5. How many input parameters does the implementation of the Predicate<T> interface have?
6. What is the...