Copy of Unit 2.6 Data Representation Lesson 5 - Compression

What is compression? (1-4)

• To convert one file to another
• To reduce the size of data to save space
• To minimize the time taken for a file to be downloaded
• To compress something by pressing it very hard

What does Lossy Compression do to files? (4-6)

• Increases the file size and keeps the same quality
• Eliminates no information at all
• Decreases the file size and keeps the same quality
• Eliminates unnecessary information in a file to reduce file size

What is Lossless Compression? (4-6)

• No information is lost but file size is increased
• There is no loss in information at all after compression
• Files which have the exact same data after compression
• Compression that involves an algorithm

What type of compression does the ZIP format use? (7-9)

• Lossy
• Lossless

What type of compression would you use to compress a video? (4-6)

• Lossy
• Lossless

What type of compression would you use to compress a text file (4-6)

• Lossy
• Lossless

What type of compression may remove some of the data?

• Lossy
• Lossless

Which of the following are not in a compressed format? (7-9)

• JPEG
• MPEG
• Bitmap
• MP3

Uncompressed audio and video files require less memory than compressed files. (1-4)

• True
• False

JPEG Stands for (4-6)

• Joint Photo Exempted Grade
• Joint Photographic Experts Group
• Junior Photographic Export Group