IGCSE Information & Communication Technology Paper1: Specimen Questions with Answers 35  35 of 46
Question 35
Appeared in Year: 2009
Question
Match ListⅠ ListⅡ▾Match the following
ListⅠ  ListⅡ 
(A) Integer  (i) Used for data that is made up of letters and numbers 
(B) Boolean  (ii) Used when there are only two possible responses to a question 
(C) Alphanumeric  (iii) Made up of whole numbers 
(D) Real  (iv) Numbers include decimals 
Choices
Choice (4)  

 
a. 
 
b. 
 
c. 
 
d. 

Answer
b.Explanation
Real, Boolean, integer and alphanumeric are different data types.
The main types of data found in a computer system are:
 Boolean (True/False)  sometimes also called ‘logical’
 Text/Alphanumeric
 Numeric (Numbers)
 Currency (Money)
 Percentage
 Date/Time
 Boolean: Boolean data can only have one of two values  true or false. Boolean՚s are used when there are only two possible responses to a question. Examples of responses that can be stored as a Boolean are:
 True/False
 Yes/No
 On/Off
 Male/Female
 1 or 0
 Alphanumeric: Alphanumeric data is used for data that is made up of letters AND numbers . Other symbols such as @, #, $ , / and spaces are also considered to be alphanumeric. For example: a password of ‘JUPITER123’ would be regarded as alphanumeric.
 Numeric (number) data can be in two forms: Integer and Real.
 Integer: Integers are made up of whole numbers (numbers without decimals) . Integers can be both positive and negative values. For example: the number 123 is an integer. 123 is also an integer
 Real: Real numbers are those that include decimals. Real numbers can be both positive (above zero) and negative (below zero) . For example: the number 33.5 is a real number. 33.5 is also a real number.