Test 5

One place left shift on a binary number...

• doubles the number.

• halves the number.

All data must be converted into...

• a binary format to be processed by a computer.

• a hexadecimal format to be processed by a computer.

How many bits are in a kilobyte?

• 8000

• 1000

• 4

An image's 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 to 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 for each pixel in an image will...

• increase the range of colours that the image can display.

• decrease the resolution of the image.

• have no effect on the file size.

Ben opens a text file. It contains 30 characters, as shown below. Each character is represented using the ASCII character set. The binary representation for the character 'y' is 01111001. What is the binary representation for the character 'z'?

Calculate the size of the text file in bits.