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Worksheets

Y11 Mock 2025

Total questions: 74

Worksheet time: 41mins

Name
Class
Date
1.

Which register is being described?
Stores the results of the calculations done by the ALU

a)
MAR
b)
MDR
c)
Accumulator
d)
Program Counter
2.

Which register is being described?
Holds the memory address about to be used by the CPU

a)
MAR
b)
MDR
c)
Accumulator
d)
Program Counter
3.

Which register is being described?
Holds the data / instructions that have been fetched from memory

a)
MAR
b)
MDR
c)
Accumulator
d)
Program Counter
4.

Which register is being described?
Holds the memory address of the instruction for each cycle

a)
MAR
b)
MDR
c)
Accumulator
d)
Program Counter
5.
What are registers used for?
a)
To check that students are in school.
b)
To temporarily hold bits of data needed by the CPU.
c)
To make sure that the CPU runs properly.
d)
To make the CPU faster.
6.

What are the four registers in the CPU called?

a)

PC, MDR, Accumulator, MAR

b)

Cache, ALU, Control Unit

c)

ALU, PC, CU, Accumulator

d)

MAR, MDR, CAR, ALU

7.

A (a)   consists of 8 bits.

8.

A (a)   consists of 4 bits.

9.

How many bits are in 2 kilobytes?

a)
2
b)
2 x 1024 x 8 = 16384
c)
2 x 1024 = 2048
10.

Convert the binary number 110110 to denary.

a)

52

b)

54

c)

55

d)

56

11.

Convert the binary number 0001 1101 to denary

(a)  

12.

Convert the denary number 47 to binary

(a)  

13.
Calculate the binary addition:
00111011
00110011
Use binary addition rules + whiteboards!
a)
01101111
b)
01111110
c)
01101110
d)
11111110
14.

When binary addition results in a number larger than 8-bits (or the amount of space allocated to it), there is an error. It is called an..

a)

Addition error

b)

Overflow error

c)

9-bit error

d)

Actuary error

15.

A binary shift to the left means that the number is...

a)

Added

b)

Multiplied

c)

Divided

d)

Subtracted

16.

What is the result of shifting the binary number 1100 (12 in decimal) one place to the left?

a)

12

b)

24

c)

6

d)

10

17.

A binary shift to the right means that the number is...

a)

Added

b)

Multiplied

c)

Divided

d)

Subtracted

18.

Which of these are hexadecimal digits?

a)

F

b)

G

c)

6

d)

0

e)

H

19.

What is the hexadecimal representation of the denary number 68?

a)

44

b)

68

c)

7C

d)

C7

20.

Which of the following denary numbers is correctly converted to hexadecimal as 5B?

a)

91

b)

19

c)

172

d)

207

21.

Which of the following hexadecimal numbers is equal to 250 in decimal?

a)

FA

b)

C0

c)

2B

d)

11

22.

What is the value of the hexadecimal number 7C in decimal (denary)?

a)

124

b)

112

c)

28

d)

192

23.

Convert the denary number 204 to hexadecimal

(a)  

24.

Directly convert a binary number into a hex number: 10111001 (use capital letters in your answer if any)

(a)  

25.

Convert the hexadecimal number A5 to binary

(a)  

26.

Convert the binary number 0110 1101 to hexadecimal

(a)  

27.
True or False: In an ASCII file, each alphabetic, numeric, or special character is represented with a 7-bit binary number (a string of seven 0s or 1s).
a)
True
b)
False
28.
ASCII is:
a)
a numerical system that has 2 rather than 10 as a base.
b)
the most common format for text files in computers and on the Internet
29.

ASCII can represent more characters than Unicode?

a)
True
b)
False
30.
The following is true about character sets:
a)
Each letter has a unique code
b)
Lower and upper case letters share the same codes
c)
ASCII is one of the latest character sets to be adopted
31.

Why was Unicode developed?

a)

To replace binary code

b)

To provide a universal character set for all languages

c)

To improve internet speed

d)

To reduce file sizes

32.

What is a Pixel?

a)

A small area of color

b)

A type of phone

c)

A picture

d)

The size of a picture

33.

What is the relationship between image resolution and file size?

a)

Higher resolution generally means a smaller file size.

b)

Higher resolution generally means a larger file size.

c)

Resolution does not affect file size.

d)

Lower resolution generally means a larger file size.

34.

What does the term 'colour depth' refer to in digital images?

a)

The size of the image

b)

The number of bits used to store each pixel

c)

The resolution of the image

d)

The width and height of the image

35.

The technical specifications of your new phone report that it has an 8-megapixel camera. What does that mean?

a)

It takes pictures that consist of 8 big pixels.

b)

It takes pictures that consist of 8 thousand pixels.

c)

It takes pictures that consist of 8 million pixels.

d)

It takes pictures that are 8 megabytes in size.

36.

What is the name of the process of capturing sound and converting it into digital form?

(a)  

37.

What is sampling?

a)

The number of bits used to represent the sound

b)

Turning a microphone on and off to only record sound at certain times

c)

Taking measurements of a wave at regular intervals

d)

Combining two sound waves into one

38.

What is sample rate?

a)

The number of bits used for a sample

b)

How many times a sound wave goes up and down

c)

How fast a sound wave moves

d)

How many samples you take each second

39.

What is sample rate measured in?

a)

bits

b)

Hertz

c)

Kbps

d)

Decibels

40.

If the sample rate and sample resolution are increased, what happens to the sound file?

a)

Quality goes up. Size of the file goes up.

b)

Quality goes down. Size of the file goes down.

c)

Quality goes down. Size of the file goes up.

d)

Quality goes up. Size of the file goes down.

41.
What is a characteristic of a LAN?
a)
Small geographical location such as a school or small office.
b)
Really cheap to set up.
c)
Uses less cables than a star.
42.
Describe what is meant by a wide area network (WAN)
a)
Computers connected together over a small area, such as a building
b)
Several networks connected together over a large geographical area
43.
What is bandwidth?
a)
The amount of data that can be carried at any one time.
b)
The overall amount of data I use in a month.
c)
The speed of my data per second to a friend and back.
44.
Networks are usually wireless or wired. What is an advantage of cable network?
a)
More expensive
b)
Less secure
c)
Faster transfer speeds
d)
More inconvenient
45.
The best use of wireless connections is for...
a)
Security and gaming
b)
Portable devices
c)
Getting a connection in difficult to reach areas
46.

What is the main difference between IPv4 and IPv6?

a)

IPv4 is for mobile devices, IPv6 is for desktop devices

b)

IPv4 is older and uses 32-bit addresses, while IPv6 uses 128-bit addresses

c)

IPv4 uses letters, IPv6 uses numbers

d)

IPv4 is more secure than IPv6

47.

Which of the following is an example of an IPv4 address?

a)

2001:0db8:85a3::8a2e:0370:7334

b)

192.168.1.1

c)

256.256.256.256

d)

a1b2c3d4

48.

Why was IPv6 developed?

a)

To improve speed

b)

To allow for more IP addresses due to the shortage in IPv4

c)

To encrypt data

d)

To make networks more secure

49.

What type of address format does IPv6 use?

a)

Binary

b)

Decimal

c)

Hexadecimal

d)

Octal

50.
More cost efficient network topology
a)
Star Topology
b)
Mesh Topology
51.

What are the benefits of using a mesh network topology?

a)

Uses less cable per node

b)

If a node goes down it's unlikely to affect the rest of the network

c)

Higher speeds and less congestion

d)

Nodes can repeat and pass on data between them to make the network highly resilient

52.
What type of network is this?
a)
Mesh
b)
Star
c)
Ring
d)
Token
53.

Which network topology is the most resilient when nodes are offline?

a)

Mesh

b)

Star

c)

Bus

d)

Ring

54.
In a star network
a)
Each device is connected to a switch or hub
b)
Each device connects to each other
c)
Each device is connected in a line
d)
Each device is connected to a terminal
55.

A star topology will cause a network failure if...

a)

If the hub/switch fails

b)

If one of the many of the computers fail

c)

If the printer fails

56.

Explain the difference between encryption and decryption.

a)

Encryption converts plaintext to ciphertext, while decryption converts ciphertext to plaintext.

b)

Encryption is used for compressing data, while decryption is used for decompressing data.

c)

Encryption converts ciphertext to plaintext, while decryption converts plaintext to ciphertext.

d)

Encryption and decryption are the same process.

57.

What is the purpose of a Domain Name Server (DNS)?

a)

To store website content

b)

To convert domain names into IP addresses

c)

To manage internet traffic

d)

To provide security for websites

58.

What does DNS stand for?

a)

Domain Name System

b)

Domain Nomenclature Service

c)

Dynamic Naming Service

d)

Do Not Send

59.

Which of the following best describes the role of a Domain Name Server (DNS)?

a)

It translates domain names into IP addresses so users can access websites.

b)

It stores all the content of websites.

c)

It provides internet access to users.

d)

It encrypts data sent over the internet.

60.
Which part of the operating system will move data from the RAM to the virtual memory to allow the computer to perform tasks as though the computer had more RAM?
a)
Memory management
b)
File and disk management
c)
User management
d)
User interface
61.
Which part of the operating system will split the disk in storage sectors and decide which sectors to write data to?
a)
Memory management
b)
File and disk management
c)
User management
d)
User interface
62.
Being able to run several applications at the same time is known as�
a)
Multi tasking
b)
Application management
c)
Multi cores
d)
Application control
63.
Which part of the operating system deals with the movement, editing and deletion of data?
a)
Memory management
b)
File and disk management
c)
User management
d)
User interface
64.

Which of the following ARE features of user management for an Operating System?

a)

Different users can be given different access rights

b)

New users can be given network accounts

c)

Creating and managing passwords and usernames

d)

Files can be deleted, renamed and reorganised

65.

What is the role of memory management in an operating system?

a)

To manage peripheral devices

b)

To manage user accounts

c)

To manage files and folders

d)

To manage programs in RAM

66.

Which of the following is utility software?

a)

Backup software

b)

A game

c)

A word processor

d)

A web browser

67.

What is the purpose of defragmentation software?

a)

To encrypt files

b)

To compress files

c)

To speed up file retrieval

d)

To delete unnecessary files

68.
What health hazards are assosiated with E-waste being stored incorrectly
a)
Lung Cancer
b)
DNA Damage
c)
Asthmatic Bronchitis
d)
All of the above
69.
Which one of these is not an environmental issue
a)
Gaining unauthorized Access to a computer network
b)
Sending old tech to landfill
c)
Safe disposal of toxic and carcinogenic components
d)
Leaving electronic devices on standby
70.
Why are data centres an environmental issue
a)
They are really large
b)
They consume a lot of power
c)
They take up a lot of green space
d)
They employ too many people
71.
What does the term E-Waste mean
a)
Extra Waste
b)
Electronic Waste
c)
Electrical Waste
d)
Environmental Waste
72.
What is a 'data breach' according to the Data Protection Act 2018?
a)
An error in data entry by an employee
b)
A situation where data is lost during transmission
c)
A failure to collect data correctly
d)
An incident where personal data is accessed without authorisation
73.
What is meant by 'data minimisation' in the context of the Data Protection Act 2018?
a)
Eliminating all data that is not used regularly
b)
Maximising the amount of data collected from users
c)
Storing data in multiple locations for safety
d)
Collecting only the data that is necessary for a specific purpose
74.
What is the main purpose of the Data Protection Act 2018?
a)
To restrict internet access for individuals
b)
To eliminate all forms of data storage
c)
To promote data sharing between companies
d)
To protect personal data and privacy of individuals

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