AQA Data Representation

In computing a bit is

• 8 bytes

• a single 0 or 1

• 1 nibble

Which is the correct unit of storage from lowest to highest

• bit, nibble, byte, kilobyte, megabyte, gigabyte, terabyte

• bit, byte, nibble, kilobyte, megabyte, gigabyte, terabyte

• bit, nibble, byte, megabyte, kilobyte, gigabyte, terabyte

• byte, bit, nibble, megabyte, kilobyte, gigabyte, terabyte

A gigabyte consists of 1000

• megabytes

• terabytes

• kilobytes

• nibbles

Convert 64 to binary

• 1000000

• 0111110

• 0100000

• 1101100

Convert hex A to decimal

• 10

• 8

• 2

• 100

A single hex digit is represented by

• a nibble

• a bit

• a byte

• a kilobyte

Add binary 100 and 010

• 8

• 6

• 4

• 10

How many bits are used in basic ASCII

• 7

• 8

• 16

• 32

How many colours can be represented in an image that has a 4-bit colour depth

• 8

• 16

• 64

• 256

Which is the correct formula for calculating image file size in bits

• image width x image height x colour depth

• (image width + image height x colour depth) / 8

• image width x image height + colour depth

• (image width x image height x colour depth) / 8