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Thursday 03 March – Morning GCSE (9–1) Computer Science J277/01 Computer systems
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Thursday 03 March – Morning GCSE (9–1) Computer Science J277/01 Computer systems Question Paper
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Oxford Cambridge and RSAThursday 03 March – Morning
GCSE (9–1) Computer Science
J277/01 Computer systems
Time allowed: 1 hour 30 minutes
Do not use:
* 9 0 0 2 2 4 3 1 2 3 *
• a calculator
* J 2 7 6 0 1 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
INFORMATION
• The total mark for this paper is 80.
• The marks for each question are shown in brackets [ ].
• Quality of written communication will be assessed in questions marked with an
asterisk (*).
• This document has 12 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2021 [601/8355/X] OCR is an exempt Charity
DC (RW) 300548/4 Turn over
, 2
1 A computer system has a 2.5 GHz processor and 5 GB of RAM.
(a) Complete the paragraph about memory by writing the missing terms in the spaces, using the
words provided.
cache data hard drive instructions changed closing
operator primary random read secondary start-up
translator memory stick virtual write
ROM stands for ................................. only memory. This stores the .................................
instructions for a computer and cannot be ................................. .
RAM stands for ................................. access memory. This stores the instructions and
................................. that are currently being used. If the computer does not have enough
RAM to run a process it can make use of ................................. memory.
RAM and ROM are both examples of ................................. memory. Memory located close
to the processor that allows faster access than from RAM is called .................................
memory. [8]
(b) (i) State the purpose of a CPU.
...........................................................................................................................................
...................................................................................................................................... [1]
(ii) State what is meant by a single core 2.5 GHz processor.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [2]
(c) Von Neumann architecture includes registers.
Identify two registers used in Von Neumann architecture.
1 ................................................................................................................................................
2 ................................................................................................................................................
[2]
© OCR 2021
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