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

Question number: 35

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Appeared in Year: 2009

Match List-Ⅰ List-Ⅱ▾

Question

Match the following

List-Ⅰ (Column-I)List-Ⅱ (Column-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

Choices

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)

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. Booleans 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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