Lossless and Lossy Compression Concepts

This video tutorial explains the concepts of lossy and lossless compression, highlighting their importance in managing file sizes for efficient transmission and storage. Lossy compression reduces file size by removing some data, making it suitable for media files but not for programs. Lossless compression retains all data, allowing the original file to be recreated, making it ideal for data-sensitive applications. The tutorial also discusses the factors to consider when choosing a compression method, such as bandwidth and storage requirements.

Why is compression important when transmitting files over the Internet?

• To increase the file size

• To improve the file quality

• To change the file format

• To reduce the file size

Which of the following is a characteristic of lossy compression?

• It retains all original data

• It increases file size

• It removes some data permanently

• It is suitable for computer programs

What is a common use case for lossy compression?

• Images, sound, and video

• Computer programs

• Text documents

• Database files

What happens to an image when it undergoes lossy compression?

• It becomes clearer

• It retains its original quality

• It becomes larger in size

• It may become blurry or pixelated

Which of the following is NOT a method used in lossy compression?

• Reducing resolution

• Reducing color depth

• Cropping specific areas

• Increasing color depth

What is a key feature of lossless compression?

• It cannot recreate the original file

• It is only used for images

• It reduces file size without data loss

• It permanently removes some data

Which algorithm is associated with lossless compression?

• JPEG

• MP3

• LZW

• H.264

Which of the following formats uses lossless compression?

• JPEG

• MP3

• GIF

• MP4

Why is lossless compression preferred for computer programs?

• It can afford to lose some data

• It increases the file size

• It is faster to compress

• It ensures no data is lost

Which of the following is an example of a lossless compression format used for archiving?

• AVI

• ZIP

• MP3

• JPEG