2025 OCR A-LEVEL COMPUTER SCIENCE H446/01 Computer Systems Question Paper &
Mark Scheme (Merged) June 2025 [VERIFIED]
© OCR 2025 OCR is an exempt
[601/4911/5] DC Charity Turn over
(PQ/CB) 340531/5
, 2
1 Charlie is about to study a computer games design course at university. He needs to
purchase a computer to allow him to design and edit the graphics in his games, including
video files.
(a) Charlie’s computer contains a data bus, an address bus and a control bus.
State the purpose of each of these three buses.
Data bus ...........................................................................................................................................
..........................................................................................................................................................
Address bus .....................................................................................................................................
..........................................................................................................................................................
Control bus .......................................................................................................................................
..........................................................................................................................................................
[3]
(b) Charlie will need to use input and output devices when designing and editing his computer
games.
(i) State one input device and one output device that Charlie could use and give an example
use of each.
Input device
Device name ....................................................................................................................................
..........................................................................................................................................................
Example use ....................................................................................................................................
..........................................................................................................................................................
Output device
Device name .....................................................................................................................................
..........................................................................................................................................................
Example use .....................................................................................................................................
..........................................................................................................................................................
[4]
© OCR 2025
, 3
(ii) Charlie will need to store a large collection of files containing high definition images
and high definition videos that he will use during his course.
State a type of secondary storage device that Charlie could use and give a reason why.
Type of storage .................................................................................................................................
..........................................................................................................................................................
Reason..............................................................................................................................................
..........................................................................................................................................................
[2]
(c) In addition to the Central Processing Unit (CPU), Charlie will purchase a Graphical
Processing Unit (GPU) that will be used to process and display the graphics in his
games.
(i) Tick (✓) one box on each row to indicate if each statement is referring to a CPU or a GPU.
Statement CPU GPU
Suited to performing simple operations in parallel on larger data
sets
Suited to performing complex operations on smaller data sets
[2]
(ii) State two benefits of using a GPU to process and display the graphics in computer games.
Benefit 1 ...........................................................................................................................................
..........................................................................................................................................................
Benefit 2 ...........................................................................................................................................
..........................................................................................................................................................
[2]
(d) Charlie will require an operating system that will allow him to have several applications
open at the same time.
(i) State which type of operating system Charlie will need to install.
..........................................................................................................................................................
. ................................................................................................................................................. [1]
© OCR 2025 Turn over
,
Mark Scheme (Merged) June 2025 [VERIFIED]
© OCR 2025 OCR is an exempt
[601/4911/5] DC Charity Turn over
(PQ/CB) 340531/5
, 2
1 Charlie is about to study a computer games design course at university. He needs to
purchase a computer to allow him to design and edit the graphics in his games, including
video files.
(a) Charlie’s computer contains a data bus, an address bus and a control bus.
State the purpose of each of these three buses.
Data bus ...........................................................................................................................................
..........................................................................................................................................................
Address bus .....................................................................................................................................
..........................................................................................................................................................
Control bus .......................................................................................................................................
..........................................................................................................................................................
[3]
(b) Charlie will need to use input and output devices when designing and editing his computer
games.
(i) State one input device and one output device that Charlie could use and give an example
use of each.
Input device
Device name ....................................................................................................................................
..........................................................................................................................................................
Example use ....................................................................................................................................
..........................................................................................................................................................
Output device
Device name .....................................................................................................................................
..........................................................................................................................................................
Example use .....................................................................................................................................
..........................................................................................................................................................
[4]
© OCR 2025
, 3
(ii) Charlie will need to store a large collection of files containing high definition images
and high definition videos that he will use during his course.
State a type of secondary storage device that Charlie could use and give a reason why.
Type of storage .................................................................................................................................
..........................................................................................................................................................
Reason..............................................................................................................................................
..........................................................................................................................................................
[2]
(c) In addition to the Central Processing Unit (CPU), Charlie will purchase a Graphical
Processing Unit (GPU) that will be used to process and display the graphics in his
games.
(i) Tick (✓) one box on each row to indicate if each statement is referring to a CPU or a GPU.
Statement CPU GPU
Suited to performing simple operations in parallel on larger data
sets
Suited to performing complex operations on smaller data sets
[2]
(ii) State two benefits of using a GPU to process and display the graphics in computer games.
Benefit 1 ...........................................................................................................................................
..........................................................................................................................................................
Benefit 2 ...........................................................................................................................................
..........................................................................................................................................................
[2]
(d) Charlie will require an operating system that will allow him to have several applications
open at the same time.
(i) State which type of operating system Charlie will need to install.
..........................................................................................................................................................
. ................................................................................................................................................. [1]
© OCR 2025 Turn over
,
