AQA AS Computing: 2.2 Data Types

Question 1

Global Variable

Answer 1

A variable declared at the beginning of a program and accessible from anywhere in the program

Question 2

Local Variable

Answer 2

A variable declared in a program block (procedure/method) and accessible only from within that program block

Question 3

Scope of a variable

Answer 3

The blocks of code to which a variable is accessible (Local/Global)

Question 4

Constant

Answer 4

A value that does not change throughout the program

Question 5

Integer

Answer 5

A whole number

Question 6

Real number

Answer 6

A number with a decimal point and a fractional part

Question 7

String

Answer 7

A sequence of zero or more characters

Question 8

Character

Answer 8

Any letter, numeral or symbol in the given character set, such as the ASCII character set

Question 9

Boolean data

Answer 9

Can be one of two possible values, True or False

Question 10

Record

Answer 10

A data structure that groups a number of related variables

Question 11

Field

Answer 11

A variable that is part of a record

Question 12

Enumerated type

Answer 12

An ordered set of values

Question 13

Ordinal type

Answer 13

Defines an ordered set of values such as integer, character, Boolean and enumerated types; real numbers are NOT of ordinal type

Question 14

Set

Answer 14

A collection of values of the same ordinal type with no associated order