Lossy & Lossless Compression

Refers to the compression when some of the data from the original file is lost

• lossless

• 300 dpi

• lossy

• cmyk

Compression is a process used to reduce the number of bits necessary to represent something.

• True

• False

Computers store information in bits, or binary digits. Which of the following could be represented in bits?

• Numbers

• Text

• Images

• Sounds

• All of the above

Which form of comression would you use to save data when you transmit text messages and you don't want to lose information?

• Lossless Compression
• Lossy Compression
• Reversible Encryption
• Compression Encryption

Ryan is designing an app that needs to quickly send low quality photos between users. Most smartphones take much higher quality photos than Ryan needs for his app. Which answer best describes the type of compression Ryan should choose and why?

• Lossy compression since it typically results in smaller data sizes.

• Lossless compression since it ensures perfect reconstruction of the photo.

• Lossy compression since it ensures perfect reconstruction of the photo.

• Lossless compression since it typically results in smaller data sizes.

What is the purpose of compressing digital information?

• To make it easier to store

• To make it easier to send over the internet

• To reduce the amount of space it takes up

• All of the above

What is lossy compression?

• Compressing data without losing any details

• Throwing away some information to save space

• Compressing data using patterns

• None of the above

What is lossless compression?

• Compressing data without losing any details

• Throwing away some information to save space

• Compressing data using patterns

• None of the above

What is the goal of data compression algorithms?

• To represent information in the smallest format possible

• To reduce the size of the dictionary

• To increase the amount of space needed for storage

• To remove all patterns from the data

Which compression technique guarantees no loss of data?

• Lossy compression

• Lossless compression

• Data compression

• Uncompressed