iGCSE Computer Science: Data Compression and Encryption

Quiz
•
Computers
•
9th - 12th Grade
•
Hard
Calum Gordon
Used 233+ times
FREE Resource
18 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which of these are recognised types of file compression? (select all that apply)
lossless
lossy
superchannel
standard
redundant
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
What are the main reasons to compress data? (select all that apply)
To reduce secondary storage space
To maximise the available RAM memory
To speed up network transmission times
To optimise the data
To reduce packet congestion on networks
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which of these are recognised lossless compression algorithms? (select all that apply)
RLE
LZ-77 (dictionary coder)
Caesar cipher
Merges sort
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the correct Run-length encoding for the data: cccmmmmmsssssdcccccc
3c5m5s1d6c
c3m5s5d1c6
cmsdc35516
cccmmmmmsssssdcccccc
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which of these image file formats support lossless compression techniques? (select all that apply)
JPG
PNG
GIF
BMP
SVG
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of these audio file formats support lossy compression?
FLAC
MP3
WAV
OggPCM
WMA
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the correct order of memory storage units from smallest to largest?
KiB MB MiB GB TiB
KiB MiB MB TiB GB
MB MiB KB GB TiB
KB GB MB MiB TiB
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