Quiz  /  Data compression Class 9 MCQ Questions With Answers

  • 1. 
    There are _____ different types of compression

  • 2
  • 3
  • 4

  • 2. 
    Compression looks for _______ data

  • Unnecessary
  • Repeated

  • 3. 
    When Lossy compression is used data is lost?

  • True
  • False

  • 4. 
    What is Lossless Compression?

  • No information is lost but file size is increased
  • There is no loss of information at all after compression
  • Files which have the exact same data after compression
  • Compression involves an algorithm

  • 5. 
    Jaspreet and Mark are recording a podcast that they will be uploading to the internet so that listeners can download or stream it. What type of compression is suitable for the sound file?

  • Lossy
  • Lossless

  • 6. 
    Makes the file smaller by deleting parts of the file permanently (forever)

  • Lossy Compression
  • Lossless Compression

  • 7. 
    Which of these is an advantage for Lossless compression?

  • The file size becomes significantly (much) smaller
  • The file size does not become much smaller than 50%

  • 8. 
    What type of compression would you use to compress a text file?

  • Lossy
  • Lossless

  • 9. 
    Uncompressed audio and video files require less memory than compressed files....

  • True
  • False

  • 10. 
    Lossless compression permanently deletes the data

  • True
  • False

  • 11. 
    Lossy compression would be suitable for text files

  • True
  • False

  • 12. 
    What would you use compression for?

  • Making an image file smaller
  • Modifying an image

  • 13. 
    Which of the following would not be suitable for Lossy Compression?

  • Images
  • Sounds
  • Videos
  • Text

  • 14. 
    Which of these is an advantage for Lossy compression?

  • The file size becomes significantly (much) smaller
  • The file size does not become much smaller than 50%

  • 15. 
    Makes the file smaller by giving repeated patterns/colours a specific code

  • Lossy Compression
  • Lossless Compression

  • 16. 
    What does Lossy Compression do to files?

  • Increases the file size and keeps the same quality
  • Eliminates no information at all
  • Decreases the file size and keeps the same quality
  • Eliminates unnecessary information in a file to reduce file size

  • 17. 
    A set of instructions for the computer to follow

  • Algorithm
  • Iteration

  • 18. 
    TRUE or FALSE: Some file formats are able to support both lossy and lossless compression

  • True
  • False

  • 19. 
    What is compression?

  • To convert one file to another
  • To reduce the size of data to save space
  • To minimise the time taken for a file to be download
  • To compress something by pressing it hard

  • 20. 
    Compression in general makes it _______ to send, upload and stream data

  • Quicker
  • Slower

  • 21. 
    What type of compression does the ZIP format use?

  • Lossy
  • Lossless

  • 22. 
    Kara is using an app to convert printed text into e-books that she can read on her phone. What type of compression would be appropriate here?

  • Lossy
  • Lossless
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