O-LevelComputer ScienceData Representation2210/12 · May/June 2024 · Q16 Marks
Data can be measured in bits.
- (a)Give the name of the data storage measurement that is equal to 8 bits.[1]
- (b)State how many bits there are in a kibibyte (KiB).[1]
- (c)Give the name of the data storage measurement that is equal to 1024 gibibytes (GiB).[1]
- (d)A 16-bit colour image has a resolution of 512 pixels wide by 512 pixels high. Calculate the file size of the image in kibibytes (KiB). Show all your working. Answer __________ KiB[3]
Mark scheme
Marking points from the official mark scheme (May/June 2024). The mark or mark type is shown in brackets.
- [1] (1) byte
- [1] 8192
- [1] (1) Tebibyte // TiB
- [3] One mark for each correct stage of working (max 2): • 512 x 512 • 262 144 * 2 // multiplied by 16 and divided by 8 • 524 288/1024 One mark for the correct answer: 512 (KiB)
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