N5 Computing Science: Data Representation

What is the number base used by computers to store all data?

• Decimal

• Hexadecimal

• Binary

• Octal

Answer explanation

Computers use the binary number base to store all data, representing information using combinations of 0s and 1s.

What are whole numbers called in computing terminology?

• Real numbers

• Integers

• Fractions

• Pixels

Answer explanation

In computing terminology, whole numbers are called Integers. Integers are whole numbers without any decimal or fractional parts.

How are real numbers stored in a computer system?

• Integer representation

• Binary representation

• Floating point representation

• ASCII representation

Answer explanation

Real numbers are stored in a computer system using floating point representation, which allows for a wide range of values with decimal points to be accurately represented.

What type of graphics is made up of a grid of pixels?

• Vector graphics

• Bitmap graphics

• 3D graphics

• SVG graphics

Answer explanation

Bitmap graphics are made up of a grid of pixels, where each pixel represents a single point in the image. This type of graphics is commonly used for digital images and photographs.

Which of the following is a way to represent characters in computing?

• Extended ASCII

• Binary

• Denary

• Floating point

Answer explanation

Extended ASCII is a way to represent characters in computing, using an 8-bit binary code to represent characters. Binary, Denary, and Floating point are not specific ways to represent characters.

What are the two main ways images can be stored in a computer?

• Vector and Scalar images

• Bitmap and JPEG images

• Vector and Bitmap images

• Bitmap and GIF images

Answer explanation

Images can be stored in a computer in two main ways: Vector and Bitmap images. Vector images use mathematical equations to create shapes, while Bitmap images are made up of individual pixels.

Computers store all data using:

• Binary digits

• Denary digits

• Information

• Pseudocode

Answer explanation

Computers store all data using binary digits, which consist of 0s and 1s. This is the fundamental way data is represented and processed in computer systems.

The correct mathematical term for a whole number is:

• A real number

• A rational number

• An integer

• A natural number

Answer explanation

The correct mathematical term for a whole number is an integer, which includes all positive whole numbers, zero, and negative whole numbers.

What is meant by the word pixel?

• A single dot of an digital image or graphic

• A type of computer processor

• A binary digit

• A unit of measurement for data storage

Answer explanation

The word 'pixel' refers to a single dot of a digital image or graphic, making it the correct choice among the options provided.

What is the term used to describe the data stored and processed by digital systems such as computers?

• Analog data

• Binary data

• Quantum data

• Digital code

Answer explanation

Binary data is the term used to describe the data stored and processed by digital systems such as computers.