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Worksheets1.2.5. Data Compression
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
What does Lossy Compression do to files?
a)
Increases the file size and keeps the same quality
b)
Eliminates no information at all
c)
Decreases the file size and keeps the same quality
d)
Eliminates unnecessary information in a file to reduce file size
2.
What is compression?
a)
To convert one file to another
b)
To reduce the size of data to save space
c)
To minimise the time taken for a file to be download
d)
To compress something by pressing it hard
3.
What is Lossless Compression?
a)
No information is lost but file size is increased
b)
There is no loss of information at all after compression
c)
Files which have the exact same data after compression
d)
Compression involves an algorithm
4.
What type of compression does the ZIP format use?
a)
Lossy
b)
Lossless
5.
What type of compression would you use to compress a text file?
a)
Lossy
b)
Lossless
6.
When Lossy compression is used data is lost?
a)
True
b)
False
7.
Uncompressed audio and video files require less memory than compressed files....
a)
True
b)
False
8.
TRUE or FALSE: Some file formats are able to support both lossy and lossless compression
a)
True
b)
False
9.
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?
a)
Lossy
b)
Lossless
10.
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?
a)
Lossy
b)
Lossless
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