Representation of Data

A text file contains 4000 characters and is encoded in ASCII.

Calculate the minimum number of kilobytes this would require to store.

How many bits does ASCII use to encode each character?

To represent 16 colours you would need a colour depth of _ bits.

Which of these is a limitation of ASCII?

• Takes up a lot of storage space.

• Cannot represent letters with accents.

• Cannot represent all languages.

• Cannot store numbers.

Convert the binary value 01100110 into its denary equivalent.

Convert the hexadecimal value E4 into its binary equivalent, giving your answer in 8-bit.

An image is 200 pixels wide by 400 pixels high.

It uses a colour depth of 8-bit.

Calculate the minimum file size for this image, giving your answer in KB.

Perform a right shift of 1 to the following binary value:

01100110

What effect will performing a left shift of 2 have upon a binary number?

• Multiply by 2

• Multiply by 4

• Divide by 2

• Divide by 4

An image uses a colour depth of 3.

How many possible colours can be used in the image?