Understanding Compression

The video explains the need for compression to reduce file sizes, making storage and transmission more efficient. It covers two main types: lossy and lossless compression. Lossy compression, used for multimedia, sacrifices some quality for smaller file sizes. Lossless compression retains all data, suitable for text and executable files. The video discusses the benefits of compression, such as faster downloads and more efficient storage, and provides guidance on choosing the appropriate type based on data needs.

What is the primary purpose of compression in digital files?

• To increase the file size

• To reduce the file size

• To enhance the file quality

• To change the file format

Which of the following is a common use of compression in mobile devices?

• To increase battery life

• To enhance screen resolution

• To maximize storage capacity

• To improve signal strength

What is a characteristic of lossy compression?

• File size increases

• Data is permanently lost

• File quality improves

• No data is lost

Which algorithm is associated with lossy compression?

• RAR

• ZIP

• JPEG

• PNG

What is a key feature of lossless compression?

• Data is permanently lost

• Data is encoded differently but not lost

• File size is always larger

• It is only used for images

For which type of data is lossless compression most suitable?

• Multimedia files

• Text documents

• Streaming videos

• Music files

Why is lossy compression not suitable for executable files?

• It can cause data loss

• It improves file quality

• It changes file format

• It increases file size

Which type of compression is generally more effective at reducing file size?

• Lossless compression

• Lossy compression

• Neither reduces file size

• Both are equally effective

What is a benefit of using compression for files?

• Increased bandwidth usage

• Reduced storage requirements

• Longer transmission times

• Higher data loss

Which type of compression allows files to be restored to their original state?

• Lossless compression

• Lossy compression

• Neither type

• Both types