lossless and lossy file compression

Question 1

Lossless

Answer 1

• All data is reconstructed when file is uncompressed
• Important for files where loss of data would be disasterous (Spread Sheets)
• An algorithim is use to compress data
• No data is lost
• Repeated patterns and texted are grouped

Question 2

Lossy

Answer 2

• Eliminates unnecessary data like MP# and JPEG formats
• Impossible to retrieve original file once compressed
• Reduces file quality