*1379993058*
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 80.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in question marked with an asterisk (*).
• This document has 16 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/8355/X] DC (ST) 336001/5
OCR is an exempt Charity
Turn over
1 A student is creating a presentation containing images and sound.
(a) One of the files is an audio recording.
, 2
Complete the description of how a computer stores sound. Fill in the gaps using the
given list of terms. Not all terms will be used.
analogue colour depth higher repeated smaller
binary digital lower sample rate unique
bit depth height measuring sampling
byte hertz recording seconds
An ..................................................................... sound wave needs to be converted
into a digital
sound wave.
Sound ..................................................................... is when the amplitude of the sound
wave is measured at set intervals.
The ..................................................................... is the number of times a second the
sound wave is measured. This is given in Hertz.
Each amplitude is given a ..................................................................... binary
number. The number of bits allocated to each sample is
the ..................................................................... .
The ..................................................................... the number of bits, the wider the
number of
amplitudes can be measured.
[6]
(b) The student creates 10 bitmap images using a computer.
Each image has a colour depth of 8-bits and a resolution of 800 × 500 pixels.
(i) Define the term pixel.
........................................................................................................................................
..................
........................................................................................................................................
............. [1]
(ii) Calculate the total file size of the 10 images in kilobytes.
Show your working out.
........................................................................................................................................
..................
© OCR 2025
, 3
...............................................................................................................................................
........... ...................................................................................................................................
.......................
File size: ......................................... kilobytes
[2]
(iii) State the minimum number of bits that will be needed to represent 240 different
colours.
........................................................................................................................................
............. [1]
(c) The student wants to use a secondary storage device to move their files to their home
computer.
Identify whether the student should use an optical or solid-state type of secondary
storage device. Justify your choice.
Optical or solid-state ...........................................................
Justification ....................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
............. [4]
2 A computer has an operating system.
(a) Tick (✓) one box on each row to identify the operating system function that will
manage each task.
Operating system Memory Peripheral User File
function management management management management
© OCR 2025 Turn over
, 4
Multitasking
Renaming a folder
Creation of user accounts
Installation of a printer
driver
Transfer of data to and
from RAM
[5]
(b) A computer also has utility software.
(i) State the purpose of utility software in a computer.
........................................................................................................................................
..................
........................................................................................................................................
............. [1]
(ii) Explain the purpose and function of encryption software.
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
© OCR 2025
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 80.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in question marked with an asterisk (*).
• This document has 16 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/8355/X] DC (ST) 336001/5
OCR is an exempt Charity
Turn over
1 A student is creating a presentation containing images and sound.
(a) One of the files is an audio recording.
, 2
Complete the description of how a computer stores sound. Fill in the gaps using the
given list of terms. Not all terms will be used.
analogue colour depth higher repeated smaller
binary digital lower sample rate unique
bit depth height measuring sampling
byte hertz recording seconds
An ..................................................................... sound wave needs to be converted
into a digital
sound wave.
Sound ..................................................................... is when the amplitude of the sound
wave is measured at set intervals.
The ..................................................................... is the number of times a second the
sound wave is measured. This is given in Hertz.
Each amplitude is given a ..................................................................... binary
number. The number of bits allocated to each sample is
the ..................................................................... .
The ..................................................................... the number of bits, the wider the
number of
amplitudes can be measured.
[6]
(b) The student creates 10 bitmap images using a computer.
Each image has a colour depth of 8-bits and a resolution of 800 × 500 pixels.
(i) Define the term pixel.
........................................................................................................................................
..................
........................................................................................................................................
............. [1]
(ii) Calculate the total file size of the 10 images in kilobytes.
Show your working out.
........................................................................................................................................
..................
© OCR 2025
, 3
...............................................................................................................................................
........... ...................................................................................................................................
.......................
File size: ......................................... kilobytes
[2]
(iii) State the minimum number of bits that will be needed to represent 240 different
colours.
........................................................................................................................................
............. [1]
(c) The student wants to use a secondary storage device to move their files to their home
computer.
Identify whether the student should use an optical or solid-state type of secondary
storage device. Justify your choice.
Optical or solid-state ...........................................................
Justification ....................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
............. [4]
2 A computer has an operating system.
(a) Tick (✓) one box on each row to identify the operating system function that will
manage each task.
Operating system Memory Peripheral User File
function management management management management
© OCR 2025 Turn over
, 4
Multitasking
Renaming a folder
Creation of user accounts
Installation of a printer
driver
Transfer of data to and
from RAM
[5]
(b) A computer also has utility software.
(i) State the purpose of utility software in a computer.
........................................................................................................................................
..................
........................................................................................................................................
............. [1]
(ii) Explain the purpose and function of encryption software.
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
© OCR 2025
