10 minute test 5

A one place left shift on a binary number...

• doubles the number

• halves the number

To be processed by a computer, all data must be converted into ...

• A binary format

• A hexadecimal format

How many bits are in a Kilobyte?

• 8000

• 1000

• 4

An images' creation date, time and location are all types of metadata.

• True

• False

Which of these hexadecimal numbers is the largest?

• 23

• 1F

• 2A

The process of converting an analogue signal into a digital signal is known as...

• compression

• re-coding

• sampling

Hexadecimal numbers are often used by programmers instead of binary numbers because...

• there are fewer hexadecimal numbers than binary numbers

• they are shorter, which makes them easier to remember

Increasing the number of bits used per pixel in an image will...

• increase the range of colours that the image can display

• decrease the resolution

• have no impact on the image file size

If the binary representation for y is 01111001 (121 in denary). Then what is the binary representation for z?

• 0111 1010 (122)

• 0111 1011 (123)

• 0111 1000 (120)

What is the file size of a text file in bits that contains 30 characters and uses the ASCII character set?

• 30 characters x 8 bits per character = 240 bits

• 30 characters x 7 bits per character 210 bits

• 30 characters x 8 bits per character / 8 = 30 bytes