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This test is run by .
Note that your final mark will not be saved in the system.

5. Compression, Encryption and Hashing Categorise

Target Level

Running Total

Attempt

1 of 2

Click on an item, then click on a category to place it. Or, drag and drop the item into the correct category. Organise all items before clicking 'Check'.

Identify whether each statement relates to lossy compression, lossless compression or both.

Lossy compression

Lossless compression

Both

Applied to spreadsheets, databases and similar

Applied to audio formats

Quality of the data might be compromised

Original data cannot be fully retrieved after compression

Dictionary coding is an example

Applied to text formats

JPEG is an example

MP3 is an example

Run length encoding is an example

Uses an algorithm to reduce the file size

This is your 1^st attempt! You get 3 marks for each one you get right first time. Good luck!

Pass Mark

70%