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OXFORD CAMBRIDGE AND RSA 2024 GCE Computer Science H446/01: Computer systems A Level ACTUAL QUESTION PAPER WITH MERGED MARKING SCHEME CA$10.30   Add to cart

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OXFORD CAMBRIDGE AND RSA 2024 GCE Computer Science H446/01: Computer systems A Level ACTUAL QUESTION PAPER WITH MERGED MARKING SCHEME

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OXFORD CAMBRIDGE AND RSA 2024 GCE Computer Science H446/01: Computer systems A Level ACTUAL QUESTION PAPER WITH MERGED MARKING SCHEME

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  • October 24, 2024
  • 72
  • 2024/2025
  • Exam (elaborations)
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OXFORD CAMBRIDGE AND RSA
2024




GCE Computer Science
H446/01: Computer
systems A Level




OCR 2024

, Oxford Cambridge and RSA


Monday 10 June 2024 – Afternoon
A Level Computer Science
H446/01 Computer Systems
Time allowed: 2 hours 30 minutes

You can use:
• an HB pencil
Do not use:
• a calculator




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. You can use an HB pencil, but only for graphs and diagrams.
• 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 140.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 28 pages.

ADVICE
• Read each question carefully before you start your answer.




OCR is an exempt Charity
Turn over

, 2
BLANK PAGE




PLEASE DO NOT WRITE ON THIS PAGE




© OCR 2024

, 3
1 The stored program concept uses the Fetch-Decode-Execute cycle to get the next instruction
from memory and then execute it.

(a) Describe what happens during the fetch stage of the Fetch-Decode-Execute cycle.

You should state the different registers and buses that are used in your answer.

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..................................................................................................................................................... [4]

(b) One of the instructions that may be fetched and executed as part of this cycle is a branch
instruction.

State the name of the register that would be altered in the execute phase during a branch
instruction.

..................................................................................................................................................... [1]

(c) Three ways of improving the performance of a CPU are increasing the clock speed, adding more
cores and using pipelining.

Explain how pipelining improves the performance of a CPU.

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..................................................................................................................................................... [3]




© OCR 2024 Turn over

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