IGCSE Computer Science 0478: Parity, checksum and echo checks
Students learn how parity bits, parity bytes and blocks, checksums and echo checks work, and what each can and cannot detect.
One content description from the full IGCSE Computer Science 0478 — 2.2 Methods of Error Detection journey. All 20 modules below are in that journey too, with the same content — add just these to a class, or the whole strand.
Modules (20)
1
Parity bit
2
Even parity
3
Odd parity
4
Working out the parity bit for a byte
5
Checking a received byte for a parity error
6
What a single parity check cannot detect
7
Parity byte
8
Parity block check
9
Building a parity block with a parity byte
10
Finding the error in a parity block
11
What parity bytes and blocks cannot detect
12
Binary addition rules
13
Adding two 8-bit binary integers
14
Overflow in an 8-bit register
15
Checksum
16
Calculating a checksum
17
Checking a checksum at the receiver
18
What a checksum can and cannot detect
19
Echo check
20
What an echo check cannot tell you
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