What form must data be in for a computer to be able to process it?
Binary
Denary
Binary or denary
What code can be used to convert text into binary?
Python
ASCII code
Binary code
How many characters can the ASCII code store?
129
128
266
What is included in the ASCII code?
Just letters and numbers
Just letters
Any key on a normal keyboard
What is metadata?
Data that isn't needed
Data that gives information about other data
Data that is saved for later use
What does an analogue to digital converter do?
Samples a sound wave at regular intervals then converts these to binary
Makes an image smaller
Assigns binary code to text
Why would an image be compressed?
To increase its quality
To change the colours it contains
To make it smaller to store
What does lossy compression do?
Compresses by discarding data that is thought to be unnecessary
Increases the quality of a file
Compresses by breaking the file down into smaller parts for storage then putting them back together again when opened
What does lossless compression do?
What is a popular method for lossy compression of images?
MPEG
JPEG
TIF