GCSE Computer Science Data Representation

Convert 254 to binary

• 11110000
• 11111100
• 11111111
• 11111110

Convert 00010001 to decimal

• 17
• 27
• 37
• 47

Convert 11111111 to decimal

• 255
• 245
• 235
• 225

Convert 01000100 to decimal

• 58
• 68
• 78
• 88

What two digits are used in binary?

• 0 & 2
• 1&2
• 0&1
• 1&1

Binary is also known as

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

A single 0 or 1 is known as a

• Bit
• Byte
• Nibble
• Binary

How many bits are there in a byte?

• 2
• 4
• 8
• 10

The numbers we normally use are called ________ numbers and have 10 different values.

• denary
• binary
• digital
• integers

A9

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