IMPORTANT2

Question 1

Computer misuse act, make…

Answer 1

supplying or obtain

Question 2

If not specified, are parameters passed by value or by ref?

Answer 2

by value

Question 3

What happens if a parameter is passed by value?

Answer 3

a copy of the variable is passed to the subroutine where it is treated as a local variable thus protecting it from being changed by the subroutine but also using additional memory space. It is destroyed when the subroutine has completed.

Question 4

What happens if a parameter is passsed by reference

Answer 4

the reference to the memory location of the variable itself is passed Therefore if the value of the variable is changed, it remains changed after the subroutine ends. A literal value can’t be passed by reference obviously as it has no reference (more applicable to recursive subroutines).

Question 5

How do you pass parameters by value and by reference?

Answer 5

procedure calculateTotal(x:byVal, y:byRef)