# IGCSE Information & Communication Technology Paper-1: Specimen Questions with Answers 35 - 35 of 46

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## Question 35

Appeared in Year: 2009

### Question

Match List-Ⅰ List-Ⅱ▾

Match the following

 List-Ⅰ List-Ⅱ (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

Choice (4)
• (A)
• (B)
• (C)
• (D)

a.

• (i)
• (ii)
• (iii)
• (iv)

b.

• (iii)
• (ii)
• (i)
• (iv)

c.

• (iii)
• (i)
• (iv)
• (ii)

d.

• (iii)
• (ii)
• (iv)
• (i)

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.

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