Compression

Question 1

Data Compression

Answer 1

Make file size smaller

Question 2

Uses of compressing data files;

Answer 2

Take up less storage
Streaming + downloading files from Internet is quicker (take up less bandwidth)
Email Services have restrictions on file size

Question 3

Name two types of Compression

Answer 3

Lossy

Lossless

Question 4

What is lossy compression?

Answer 4

Permanently removes data from the file -> limits the number of bits the file needs

Question 5

What is lossless compression?

Answer 5

Makes the file smaller -> temporarily removes data and restores it when the file is opened

Question 6

Lossy file types

Answer 6

MP3 (audio)

JPEG (image)

Question 7

Lossless file types

Answer 7

PNG (image)