Compression

Question 1

Compression

Answer 1

Encoding Information using fewer bits then the original

Question 2

Why compress

Answer 2

• Takes up less space on disk
• Allow things to load faster
• Allows attachments to fit. below size limit

Question 3

Types of compression

Answer 3

• Lossy
• Lossless

Question 4

Lossy

Answer 4

Permanently removing data
- cannot be decompresed to restore file to original quality

Question 5

Lossless

Answer 5

Finding patterns in data to reduce file size
- does not permanently reduce data
- is reversible

Question 6

Types of lossless compression

Answer 6

• Run length encoding
• Dictionary encoding