O-LevelComputer ScienceData Representation2210/12 · Oct/Nov 2015 · Q26 Marks

Seven computer terms and seven descriptions are shown below. Draw a line to link each computer term to its most appropriate description. Computer term Interface Interrupt JPEG Lossless compression Lossy compression MIDI MP3 format Description Reduction of file size by permanently removing some redundant information from the file File compression format designed to make photo files smaller in size for storage and for transmission File compression system for music which does not noticeably affect the quality of the sound Hardware component that allows the user to communicate with a computer or operating system The file is reduced in size for transmission and storage; it is then put back together again later producing a file identical to the original Signal sent to a processor which may cause a break in execution of the current routine, according to priorities Standard adopted by the electronic music industry for controlling devices such as synthesisers and sound cards

(a)Seven computer terms and seven descriptions are shown below. Draw a line to link each computer term to its most appropriate description. Computer term Interface Interrupt JPEG Lossless compression Lossy compression MIDI MP3 format Description Reduction of file size by permanently removing some redundant information from the file File compression format designed to make photo files smaller in size for storage and for transmission File compression system for music which does not noticeably affect the quality of the sound Hardware component that allows the user to communicate with a computer or operating system The file is reduced in size for transmission and storage; it is then put back together again later producing a file identical to the original Signal sent to a processor which may cause a break in execution of the current routine, according to priorities Standard adopted by the electronic music industry for controlling devices such as synthesisers and sound cards[6]

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Mark scheme

Marking points from the official mark scheme (Oct/Nov 2015). The mark or mark type is shown in brackets.

[1] Interface <-> Hardware component that allows the user to communicate with a computer or operating system
[1] Interrupt <-> Signal sent to a processor which may cause a break in execution of the current routine, according to priorities
[1] JPEG <-> File compression format designed to make photo files smaller in size for storage and for transmission
[1] Lossless compression <-> The file is reduced in size for transmission and storage; it is then put back together again later producing a file identical to the original
[1] Lossy compression <-> Reduction of file size by permanently removing certain, redundant information from the file
[1] MIDI <-> Standard adopted by the electronic music industry for controlling devices such as synthesisers and sound cards
[1] MP3 format <-> File compression system for music which does not noticeably affect the quality of the sound

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