Year 10 DIG Theory Class Quiz

What is the main difference between lossy and lossless compression?

• Lossy compression removes some data permanently, while lossless compression allows all data to be restored.

• Lossy compression is slower than lossless compression.

• Lossless compression always results in a smaller file than lossy compression.

• Lossy compression is only used for text files.

What is the definition of compression?

• The process of reducing the size of something by pressing or squeezing it.

• The process of expanding the size of something by pulling it apart.

• The process of changing the color of an object.

• The process of heating an object to increase its temperature.

What is the main purpose of compression in computing?

• To make file sizes smaller

• To increase the number of files

• To delete unnecessary files

• To change file formats

Which of the following best describes compression?

• A technique used to make file sizes smaller

• A method for increasing file security

• A process for duplicating files

• A way to organize files alphabetically

Why might someone use compression on their files?

• To reduce the amount of storage space needed

• To make files harder to find

• To change the file type

• To increase the file size

Which of the following is a type of data compression?

• Lossy Compression

• Data Encryption

• File Fragmentation

• Data Mining

What are the two main types of compression?

• Lossy Compression and Lossless Compression

• Data Compression and File Compression

• Image Compression and Video Compression

• Secure Compression and Fast Compression

If you need to compress a file without losing any data, which type of compression should you use?

• Lossless Compression

• Lossy Compression

• Secure Compression

• Fast Compression

Which type of image compression retains all the original data and quality?

• Lossless

• Lossy

• Progressive

• Interlaced

What is a visible effect of lossy image compression compared to lossless compression?

• Lossy compression results in reduced image quality

• Lossy compression increases image sharpness

• Lossy compression adds more colors

• Lossy compression makes the image larger in file size