GCSE Computer Science Paper 2 Revision

Convert 254 to binary

• 1111 0000

• 1111 1100

• 1111 1111

• 1111 1110

Convert 0001 0001 to decimal

• 17
• 27
• 37
• 47

Binary is also known as

• Base 1
• Base 2
• Base 10
• Base jumping

How many bits are there in a byte?

• 2
• 4
• 8
• 10

A9

• 1010 1011
• 1010 1001
• 1001 1001
• 1110 0101

1101 1110 in hexadecimal?

• ED
• DE
• EC
• CE

What is the answer to 0110 + 0101?

• 1011
• 1101
• 1110
• 1111

In representation of sound, what is the sample resolution?

• Number of bits assigned to each sample
• Rate at which the binary is calculated
• How deep the sound can go
• The speed of the sound wave

What is ASCII?

• How the internet displays images
• A character set
• A programming language
• Binary information on the computer

What is a pixel?

• The smallest area of colour in a bitmap.

• An area of colour

• A whole picture.
• A binary code.