Compression

What is the main difference between lossy and lossless compression?

• Lossy compression reduces file size by removing data, while lossless compression retains all data.

• Lossy compression retains all data, while lossless compression removes data.

• Both lossy and lossless compression remove data.

• Both lossy and lossless compression retain all data.

What is dictionary coding used for?

• Lossy compression

• Lossless compression

• Symmetric encryption

• Asymmetric encryption

Which of the following is a method of transferring data over the internet?

• Streaming

• Printing

• Faxing

• Scanning

What does compression help to make the best use of?

• Electricity

• Bandwidth

• Hardware

• Software

How does compression affect the time taken to transfer files?

• Increases the time

• Decreases the time

• Has no effect

• Doubles the time

What does compression help to reduce?

• Storage requirements

• File complexity

• Data errors

• Network security

Why might someone choose to use lossy compression?

• To increase file size

• To maintain original quality

• To reduce file size for storage

• To encrypt data

Which algorithm is responsible for reducing the file size in lossy compression?

• Decompression algorithm

• Encryption algorithm

• Compression algorithm

• Duplication algorithm

Which of the following is NOT a benefit of lossy compression?

• Smaller file size

• Faster download times

• Perfect data reconstruction

• Less storage space needed

Why might lossy compression be used for audio files?

• To increase sound quality

• To reduce file size

• To add more data

• To make files unplayable