Oxford Cambridge and RSA
Wednesday 6 October 2021 – Morning
A Level Computer Science
H446/01 Computer Systems
Time allowed: 2 hours 30 minutes
Do not use:
* 8 2 4 8 4 7 9 7 8 2 *
• a calculator
* H 4 4 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 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 24 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2021 [601/4911/5] OCR is an exempt Charity
DC (ST/CT) 300073/4 Turn over
, 2
Answer all the questions.
1 OCR Insurance uses a computer system to calculate the price that customers pay for car
insurance.
(a) The computer system contains a CPU, GPU, RAM and ROM.
(i) State two factors that affect the performance of a CPU.
1 ........................................................................................................................................
...........................................................................................................................................
2 ........................................................................................................................................
...........................................................................................................................................
[2]
(ii) Explain the difference between RAM and ROM, including how these are used by the
computer system.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [4]
(iii) Describe one non-graphical use OCR Insurance may have for a GPU.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [2]
© OCR 2021
, 3
(b) The CPU uses pipelining to improve efficiency.
Explain what is meant by the term ‘pipelining’.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
.............................................................................................................................................. [3]
© OCR 2021 Turn over
Wednesday 6 October 2021 – Morning
A Level Computer Science
H446/01 Computer Systems
Time allowed: 2 hours 30 minutes
Do not use:
* 8 2 4 8 4 7 9 7 8 2 *
• a calculator
* H 4 4 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 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 24 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2021 [601/4911/5] OCR is an exempt Charity
DC (ST/CT) 300073/4 Turn over
, 2
Answer all the questions.
1 OCR Insurance uses a computer system to calculate the price that customers pay for car
insurance.
(a) The computer system contains a CPU, GPU, RAM and ROM.
(i) State two factors that affect the performance of a CPU.
1 ........................................................................................................................................
...........................................................................................................................................
2 ........................................................................................................................................
...........................................................................................................................................
[2]
(ii) Explain the difference between RAM and ROM, including how these are used by the
computer system.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [4]
(iii) Describe one non-graphical use OCR Insurance may have for a GPU.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [2]
© OCR 2021
, 3
(b) The CPU uses pipelining to improve efficiency.
Explain what is meant by the term ‘pipelining’.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
.............................................................................................................................................. [3]
© OCR 2021 Turn over
