4.5.6.9 FoDR - Data compression

Question 1

What is meant by compression

Answer 1

The process of encoding information with fewer bits, to reduce file size

Question 2

What are the two types of compression

Answer 2

• Lossy
• Lossless

Question 3

What are the benefits of compression

Answer 3

• Files are more memory efficient as they take up less system resources
• File are faster to transfer over a network as they take up less bandwidth

Question 4

What is lossy compression

Answer 4

• A method of reducing the size of a file by identifying data within a file that can be removed, meaning a degradation of data and file quality, while creating an acceptable representation

Question 5

What is lossless compression

Answer 5

• A method of reducing the size of a file in a way where there is no degradation of data or file quality, meaning the decompressed file is identical to the original