Data Representation Part 2

A kilobyte is usually rounded to 1000 bytes. But actually it is _____ bytes:

• 1024
• 512
• 1048
• 9600

Upper and lower case letters have a different ASCII code. (3-4)

• True
• False

What is the maximum number of values that can be represented in 7 bits? (4-6)

• 16
• 256
• 65,536
• 128

What is 27 in hexadecimal

• 1B
• 17
• 11011
• 1C

What is 126 in hexadecimal

• 7E
• 111110
• 76
• 7F

What is 19 in hexadecimal

• 13
• 10011
• 19
• 1A

Colour depth refers to:

• How many bits are used in a file to store colour information in every pixel
• Resolution divided by the number of colours in an image.
• Degree of file compression applied to an image file.
• Repeated resampling of an image.

The smallest unit of data stored in an image file is called:

• Pixels
• Resolution
• Alpha
• Bitmap.

A microphone converts the changes in air pressure into voltage changes which are then digitised.

• True
• False

A kilobyte is usually rounded to 1000 bytes. But actually it is _____ bytes:

• 1024
• 512
• 1048
• 9600