WorksheetsCompression
Total questions: 11
Worksheet time: 4mins
Name
Class
Date
1.
Which of the following is TRUE about lossless compression technique?
a)
The file cannot be reconstructed back to its original form.
b)
The quality of the file remains the same after compression.
c)
The memory required to store the file after compression remains the same.
d)
All of the above
2.
Which of the following is TRUE about lossy compression technique?
a)
The quality of the file remains the same after compression.
b)
The memory required to store the file after compression remains the same.
c)
The unnecessary bits of information are removed permanently.
d)
All of the above
3.
What is the function of compression?
a)
Reducing the file size
b)
Increasing the file quality
c)
Converting analogue signals to digital files
d)
All of the above
4.
Which of the following file formats are used to store animated graphics?
a)
PNG
b)
JPEG
c)
GIF
d)
All of the above
5.
Which of the following file formats is a lossless compression technique?
a)
PNG
b)
JPEG
c)
Bitmaps
d)
All of the above
6.
Which of the following is a lossy compression technique?
a)
FLAC
b)
TIFF
c)
MP3
d)
All of the above
7.
At what speed is a high-definition video streamed online?
a)
1200kbps
b)
3Mbps
c)
320kbps
d)
2bps
8.
What parameter(s) of a video file can be changed to compress it?
a)
Resolution
b)
Dimensions
c)
Bit rate
d)
All of the above
9.
What is an artefact?
a)
Random coloured blocks in video due to compression
b)
Programs that encode an audio, image or video file
c)
Compression algorithm used to reduce file size without affecting file quality
d)
Programs that decode an audio, image or video file
10.
Which of the following requires the highest amount of data transmission rate?
a)
Watching an SD video through online streaming
b)
Telephone calls over the Internet
c)
Listening to music online
d)
Watching an HD video through online streaming
11.
Which of the following is FALSE about MP4?
a)
Encodes audio-video files
b)
Uses lossless compression technique
c)
Used for transmission over digital channels, cables and satellites.
d)
It is also a format for DVD movies
100 %
