2.2.1 Variables and Functions

What is the difference between a function and a procedure?

• They are the same

• A function returns a value

• A procedure returns a value

• A function can only be called from a procedure

What is the name used for the data passed to a subroutine in parentheses e.g. x and y in the example below.

multiply( x , y )

(a)  

What is the name for the local variables declared in the parentheses of a subroutine definition e.g. a and b in the example below.

function multiply (a, b)

(a)  

• 8 10

• 10 8

• 6 0

• 0 6

Which type of parameter passing allows a subroutine to change the value of an argument in the calling routine?

• pass by value

• pass by reference

Which type of parameter passing is when the value of the argument is copied to the local parameter variable?

• pass by value

• pass by reference

Which of the following represents labels that represent values in memory that can be changed during program execution?

• Variables

• Constants

• Data types

• Subroutines

What is scope?

• the part of a program where a variable exists

• a type of RAM

• a device used to aim a projectile

• a device in a submarine that is used to view the surface

What is the term for a variable declared inside a subroutine?

• method variable

• local variable

• global variable

• private variable

Where does a variable that is declared inside a subroutine exist?

• only in that subroutine

• anywhere in the program

• anywhere as long as the program is running