Chapter 8

Question 1

What is a Variable?

Answer 1

A named memory location that can store data. The data can change whilst a program is running

Question 2

What is a Constants?

Answer 2

A named memory location that can store data. The data cannot change whilst a program is running

Question 3

What is a identifier?

Answer 3

The name given to a variable, constant, data structure (e.g. array) or subroutine

Question 4

What is a sequence?

Answer 4

A series of statements that are executed once, in the order they are written

Question 5

State the two forms of selection.

Answer 5

IF STATEMENT
CASE STATEMENT

Question 6

State the three iterations of loops. give loop name for each one.

Answer 6

Count - Controlled —- For loop
post - condition ——— While loop
pre - condition ———–Repeat untill Until loop

Question 7

What is a Parameter?

Answer 7

It is a value that is sent to a subroutine

Question 8

State the Difference between Procedures and functions.

Answer 8

Procedures do not return a value to the program that called it while Functions do return a value to the program that called it

Question 9

Why use subroutines?

Answer 9

The subroutine can be called when needed

The subroutine can be passed data to use in comparisons or calculations

There is only one section of code to debug

There is only one section of code to update

Question 10

What is Global Scope?

Answer 10

a variable or constant can be accessed from any part of the program

Question 11

What is Local Scope?

Answer 11

a variable or constant can only be accessed in the subroutine it is declared within

Question 12

What is a Maintainable program?

Answer 12

A program that contains key features to help it be understood at a later stage