Compression Techniques in Digital Files

The video explains the need for compression, focusing on lossy and lossless methods. Compression reduces file size, making storage and data transfer more efficient. Lossy compression sacrifices some quality for smaller file sizes, suitable for images, sound, and video. Lossless compression retains all data, ideal for documents and executable files. The video also discusses the application of compression in mobile devices and the importance of choosing the right type based on data needs.

What is the primary purpose of compression in digital files?

• To enhance the file quality

• To change the file format

• To reduce the file size

• To increase the file size

What is a common use of compression on mobile devices?

• To increase battery life

• To store more data

• To enhance screen resolution

• To improve network speed

Which type of compression is suitable for images, sound, and video but not for text files?

• Both lossy and lossless

• Lossy compression

• Lossless compression

• Neither lossy nor lossless

How does lossy compression affect the quality of an image?

• It improves the quality

• It has no effect on quality

• It reduces the quality

• It changes the color scheme

What is a key characteristic of lossless compression?

• Some data is lost

• No data is lost

• It is only used for images

• It is only used for audio

Which compression method is suitable for cartoons and clip arts?

• Neither method

• Lossless compression

• Lossy compression

• Both methods

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

• Neither is effective

• Both are equally effective

• Lossless compression

• Lossy compression

Why is lossless compression preferred for executable files?

• It reduces file size more

• It improves execution speed

• It changes the file format

• It maintains data integrity

What is a disadvantage of lossy compression?

• It cannot be used for audio

• It reduces quality

• It increases file size

• It is not suitable for images

What is the main benefit of using compression for data transfer?

• It increases transfer time

• It reduces transfer time

• It changes the data format

• It improves data quality