N5 Computing Science: Data Types and Structures

Which of the following is NOT a data type you should be able to describe in N5 Computing Science?

• character

• integer

• Real

• double

Answer explanation

The correct choice is 'double' because it is NOT a data type described in N5 Computing Science curriculum.

Which of these types of data could be stored in a data type called string?

• Numeric data

• Text

• Boolean values

• None of the above

Answer explanation

The correct choice is 'Text' as strings are used to store textual data in programming languages.

Which of the following data structures should you be able to describe in N5 Compuitng Science?

• 2D array

• dictionary

• 1D array

• Class

Answer explanation

In N5 Computing Science, you should be able to describe a 1D array, making it the correct choice from the given options.

Which of the following describes a variable?

• A command in a programming language.

• A named storage location for data in a program.

• A piece of data used in a program

• A calculation done by the program.

Answer explanation

A variable is a named storage location for data in a program, making the second answer choice the correct description.

Which of the following items of data is an integer?

• scholar.hw.ac.uk

• 154

• 3.14159

• Bob

• i

Answer explanation

The correct choice is 154 as it is an integer, a whole number without any decimal or fractional part.

What does a character data type store?

• A single item of text or any symbol that can be typed

• A sequence of letters, numbers or symbols

• A decimal number

• A true or false value

Answer explanation

A character data type stores a single item of text or any symbol that can be typed, making it the correct choice among the options provided.

What is the main difference between a character and a string data type?

• A string can hold more than one character

• A character can hold more than one string

• A string is used for numbers only

• There is no difference; they are the same

Answer explanation

The main difference between a character and a string data type is that a string can hold more than one character.

Why should a phone number be stored as a string instead of an integer?

• To include symbols or spaces that are not allowed in integers

• Because phone numbers are always negative numbers

• Phone numbers contain decimal points

• Integers can only store the number zero

Answer explanation

Storing a phone number as a string allows for symbols or spaces that are not allowed in integers, making it the correct choice.

What is true about an integer data type?

• It can contain a decimal point

• It can only be a positive number

• It is a whole number that can be positive or negative

• It is used to store passwords and symbols

Answer explanation

The correct choice is 'It is a whole number that can be positive or negative' as an integer data type can represent both positive and negative whole numbers.

What term is used to describe any positive or negative number that includes decimal points in them?

• Integer

• String

• Real

• Character

Answer explanation

The term used to describe any positive or negative number that includes decimal points is 'Real'. Real numbers include integers, fractions, and irrational numbers.