O-LevelComputer ScienceProgramming2210/22 · Oct/Nov 2023 · Q53 Marks
Explain how variables and constants should be used when creating and running a program.
- Explain how variables and constants should be used when creating and running a program.[3]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.
- [3] One mark per mark point, max three
- MP1 variables and constants should have meaningful identifiers
- MP2 ...so that programmers/future programmers are able to understand their purpose
- MP3 they are both used for data storage
- MP4 constants store values that never change during the execution of a program // by example
- MP5 variables contain values that have been calculated within the program / can change during the execution of the program // by example
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