____ is the most widely used mobile operating system in the United States.

Which of the following statements is false?

a. The method’s return type specifies the type of data returned to a method’s caller. b. Empty parentheses following a method name indicate that the method does not require any parameters to perform its task. c. When a method that specifies a return type other than void is called and completes its task, the method must return a result to its calling method d. Classes often provide public methods to allow the class’s clients to set or get private instance variables; the names of these methods must begin with set or get.

A(n) ____________________ is a short series of programming instructions.

Fill in the blank(s) with the appropriate word(s).