Exam (elaborations)
CIE IGCSE COMPUTER SCIENCE (0478) REVISION EXAM QUESTIONS AND ANSWERS
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CIE IGCSE COMPUTER SCIENCE (0478) REVISION EXAM QUESTIONS AND ANSWERS
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CIE IGCSE COMPUTER SCIENCE (0478)REVISION EXAM QUESTIONS AND
ANSWERS
10011011 - Answer-Binary
5 - Answer-Denary
A4 - Answer-Hexadecimal
How many bits in a byte? - Answer-8
How many bytes in a gigabyte? - Answer-1 billion bytes
RGB - Answer-Red, Green, Blue
CMYK - Answer-Cyan, Magenta, Yellow, Key (Black)
Storage of an image - Answer-width x height x bit depth + metadata
Sample Rate - Answer-Amount of samples of sound being taken per second,
determining the accuracy of the sound being played.
Mono - Answer-One channel of sound
Stereo - Answer-Two channels of sound
Surround - Answer-More than two channels of sound
Size of a sound file - Answer-Sample rate (Hz) x bit depth x sound duration (s) x
number of channels + metadata
Odd parity - Answer-Off number of 1s in binary sequence
Even parity - Answer-Even number of 1s in binary sequence
ARQ - Answer-Automatic Repeat reQuest
Encryption - Answer-Process of converting readable data into unreadable characters to
prevent any unauthorised access.
Encryption process of characters - Answer-Plain Text -> Encryption -> Cipher Text ->
Decryption -> Plain Text
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