Free Printable OCR Compression

Worksheets

OCR Compression

Total questions: 20

Worksheet time: 10mins

Name

Class

Date

What type of compression allows you to reconstruct the original data?

Lossless compression

Lossy compression

What type of compression does not allow you to reconstruct the original data?

Lossless compression

Lossy compression

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

Lossy Compression

Lossless Compression

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

Lossy Compression

Lossless Compression

What would you use compression for?

Making an image file smaller

Modifying an image

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

Images

Music

Videos

Text

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

Quicker

Slower

Lossless compression permanently deletes the data

True

False

Lossy compression would be suitable for text files

True

False

10.

Compression looks for _______ data

Unnecessary

Repeated

11.

There are _____ different types of compression

12.

Select the advantages for lossy compression

Makes the file much smaller

Will send much quicker

A very simple algorithm

The quality will not be affected much

13.

Select the advantages for lossless compression

Makes the file much smaller

Will send quicker

A very simple algorithm

The quality will not be affected much

14.

You would use ______ compression if you still needed to have a high quality image

Lossy

Lossless

15.

You would use ______ compression if space was more important than quality

Lossy

Lossless

16.

What is the point of 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

17.

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

18.

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

19.

What type of compression would you use to compress a video?

Lossy

Lossless

20.

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

Lossy

Lossless

100 %

OCR Compression

Total questions: 20

Worksheet time: 10mins

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