Data Representation

Question 1

What are the 3 types of Logic gate?

Answer 1

AND, OR, NOT

Question 2

What 2 pieces of information are needed to store a picture?

Answer 2

The colour depth of each pixel and the resolution of the image

Question 3

What is colour depth?

Answer 3

The depth of colour in each pixel

Question 4

Give an example of colour depth

Answer 4

Depth of 1= 1 bit, so black and white, depth of 8 is 1 byte so 255 colours

Question 5

What is the resolution of a picture?

Answer 5

How many pixels use will use.

Question 6

What does a higher resolution in a picture mean?

Answer 6

The more detail you can display with more pixels

Question 7

What are some types of image representation?

Answer 7

JPG, GIF, PNG

Question 8

What are examples of metadata?

Answer 8

• Height and width of image
• Resolution
• Colour depth

Question 9

How is sound stored in digital form?

Answer 9

A microphone records sound waves and converts them to voltage. The computer’s sound card converts samples the voltage every second. This is called the sample rate. This is converted to Binary with an Analogue to Digital Converter.