Worksheets2.6 - Compression
Total questions: 10
Worksheet time: 7mins
Name
Class
Date
1.
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
2.
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
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 video?
a)
Lossy
b)
Lossless
6.
What type of compression would you use to compress a text file?
a)
Lossy
b)
Lossless
7.
When Lossy compression is used data is lost?
a)
True
b)
False
8.
Which of the following are not in a compressed format?
a)
JPEG
b)
MPEG
c)
Bitmap
d)
MP3
9.
Uncompressed audio and video files require less memory than compressed files....
a)
True
b)
False
10.
JPEG stands for...
a)
Joint Photo Exempted Grade
b)
Joint Photographic Experts Group
c)
Junior Photographic Export Group
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