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Grand CS GCSE Quiz

Total questions: 111

Worksheet time: 59mins

Name
Class
Date
1.

Spyware is best defined as software that...

a)

Causes adverts to appear on screen.

b)

Deletes your files

c)

Slows your pc down.

d)

Collects information from you and transfers it across the internet.

2.

A trojan would typically...

a)

hide on USB memory sticks.

b)

be disguised as an email attachments.

c)

be disguised as legitimate software.

d)

spread through dodgy web links

3.

Which of the following is most likely to open a “back door” into your computer system through which your personal information can be harvested.

a)

Virus

b)

Trojan Horse

c)

WAN

d)

Worm

4.

passes data over the physical network

a)

transport layer

b)

internet layer

c)

link layer

d)

application layer

5.

encrypts all information sent and received

a)

HTTP

b)

FTP

c)

HTTPS

d)

SMTP

6.

What runs tasks like the operating systems, utilities, etc

a)

Embedded systems

b)

Application software

c)

System software

d)

Dedicated systems

7.

The CPU carries out instructions, one after another, billions of times a second is known as...

a)

The Fetch-Execute Cycle

b)

The Fetch-Decode-Execute Cycle

c)

The Fetch-Breakdown-Execute Cycle

d)

The Fetch-Breakdown-Sign out Cycle

8.

RAM is

a)

Volatile

b)

Non-Volatile

9.

Which of these is NOT a type of compression?

a)

Run Length Encoding

b)

Huffman Coding

c)

Encryption

d)

Lossy

10.
Which one of these devices is solid state?
a)
USB flash memory
b)
CD
c)
DVD
d)
Magnetic stripe
11.
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.
12.

The ALU is found inside the CPU True or False?

a)

True

b)

False

13.
A pixel is the _______ part of an image.
a)
Smallest
b)
Largest
14.
What is meant by the term 'colour depth'?
a)
Width and height of an image.
b)
A pixel in an image.
c)
Quality of the colour.
d)
Number of bits used to encode each pixel.
15.
How many colours can be used for each pixel if the colour depth is 8 bit?
a)
8 colours
b)
9 colours
c)
255 colours
d)
256 colours
16.

What does the bit rate of a sampled sound refer to?

a)

The number of bits used for 1 second of audio

b)

The number of bits used for every sample

c)

The final file size of the sampled sound

d)

The speed at which the sampled sound is played back

17.

What is the standard sampling frequency for CD audio?

a)

20,000 Hz

b)

44,100 Hz

c)

33,300 Hz

d)

96,000 Hz

18.
Decomposition is a term used to define...
a)
The process of assigning value to a variable.
b)
The process of taking out unnecessary details from problems.
c)
The process of breaking down problems into smaller problems.
d)
The process of coding a problem.
19.
Abstraction is.....
a)
The process of drawing abstract pictures.
b)
The process of assigning values to variables.
c)
The process of breaking down problems.
d)
The process of removing unnecessary details from a problem.
20.
Identify the description of a binary search
a)
Put the elements in order, check each item in turn
b)
Put the elements in order, compare to the middle value, split the list in order and repeat
c)
Elements do not need to be in order, check each item in turn
d)
Elements do not need to be in order, compare to the middle value, split the list in order and repeat
21.

In a Von Neumann architecture ...

a)

data and instructions are both stored in main memory.

b)

data and instructions are stored in separate memory devices.

c)

data is stored in main memory, instructions in secondary storage.

d)

data is stored in secondary storage, instructions in main memory.

22.

Select the best description of an embedded system

a)

A general purpose computing system, traditionally with more ROM than RAM.

b)

A computing system with a specific purpose, traditionally with more RAM than ROM.

c)

A computing system with a specific purpose, traditionally with more ROM than RAM.

d)

A general purpose computing system, traditionally with more RAM than ROM.

23.

Which network device forwards data packets between networks?

a)

Router

b)

Client

c)

Server

d)

Modem

24.

Which component holds a MAC address?

a)

Network Interface Card

b)

Router

c)

Macbook

d)

Switch

25.

What is an advantage of this ring network topology

a)

If the central switch breaks it will still work.

b)

The speed of the network remains high as more devices are added.

c)

It does not require much cabling.

d)

Each device is able to communicate with all other devices.

26.

A piece of malware is distributed to disrupt a school network by a rival teacher. Which is the most relevant piece of legislation?

a)

Data Protection Act 1998

b)

Computer Misuse Act 1990

c)

Copyright, Design & Patents Act 1988

d)

Electronics Communication Act 2000

27.

Validation codes to download a game (RRP £50) without cost are illegally generated and distributed. Which is the most relevant piece of legislation?

a)

Data Protection Act 1998

b)

Computer Misuse Act 1990

c)

Copyright, Design & Patents Act 1988

d)

Electronics Communication Act 2000

28.

A teacher accidentally emails a file with all of their students' exam grades and data to a non-work friend. Which is the most relevant piece of legislation?

a)

Data Protection Act 1998

b)

Computer Misuse Act 1990

c)

Copyright, Design & Patents Act 1988

d)

Electronics Communication Act 2000

29.
What is a core?
a)
A processing unit in a CPU.
b)
Pixels on a screen.
c)
The centre of an apple.
d)
Data store.
30.
How many Megabytes is a Gigabyte
a)
1000mb
b)
10,000mb
c)
100mb
d)
10mb
31.
What does the word "SSD" stand for?
a)
Solid State Drive
b)
Soluble State Drive
c)
Solid Static Drive
d)
Static Solid Drive
32.
Each pixel in an image has 16 colours. What is the colour depth?
a)
4 bits
b)
2 bits
c)
3 bits
d)
5 bits
33.
How many total colours can be used in an image with a colour depth of 6 bits?
a)
64
b)
32
c)
16
d)
128
34.
An image has a height of 200 pixels, width of 400 pixels and a colour depth of 3 bits. What is the file size in bytes?
a)
30000
b)
240000
c)
120000
d)
48000
35.
The file size of an image is 90kB. The height and width are 300 and 400 pixels. What is the colour depth used in the image?
a)
6bits
b)
7bits
c)
8bits
d)
5bits
36.
Calculate the size in kilobytes of an image captured in 16 colours with a size of 1,000 pixels by 1,000 pixels?
a)
500
b)
250
c)
1000
d)
50
37.
How many bits per pixel would be required for an image with 256 colours?
a)
8
b)
4
c)
16
d)
2
38.

Are analogue and digital sounds continuous or discrete

a)

Analogue is continuous, Digital is discrete

b)

Both are continuous

c)

Analogue is discrete, Digital is continuous

d)

Both are discrete

39.

What is the file size of a 3-second long recording with a resolution of 4 bits at 8 samples per second?

a)

12 bytes

b)

6 bytes

c)

12 bits

d)

6 bits

40.

What does lossy compression usually do (to audio recordings)?

a)

Remove unecessary sound from outside the range of human hearing.

b)

Leave out repeated data.

c)

Reduce the sample resolution

d)

Reduce the sample rate

41.

What is sample rate?

a)

The number of samples recorded per second

b)

The number of bits used to record each sample

c)

How much data is processed for each sample

d)

How many waves appear

42.
1. Secondary Storage is...
a)
non-volatile
b)
volatile
c)
extremely large
d)
portable
43.

Convert A7 from hexadecimal to denary

a)

176

b)

26

c)

122

d)

167

44.

What is 53 in binary?

a)

01100101

b)

00110101

c)

00011011

d)

01010101

45.

What is 0101 + 0110 ?

a)

1011

b)

0111

c)

1101

d)

1110

46.

A = 1 B = 1 C = 0

What is the final output Y?

a)

0

b)

1

c)

2

d)

3

47.
Convert the Hex number DA to binary.
a)
11001010
b)
11011011
c)
11011010
d)
11011110
48.
Convert the binary number 10101010 to Hex
a)
AA
b)
BB
c)
CC
d)
DD
49.

An electronic device inside a CPU that 'ticks' at regular intervals and is used to synchronise the actions of the other parts of the CPU

a)

Arithmetic/Logic Unit (ALU)

b)

Register

c)

Control Unit

d)

Clock

50.

The part of the CPU that performs calculations and logic operations

a)

Register

b)

Control Unit

c)

Clock

d)

Arithmetic/logic unit (ALU)

51.

Which network topology makes use of a single backbone cable and two terminators.

a)

Mesh

b)

Star

c)

Bus

d)

Ring

52.

Covers a small geographical area on a single site

a)

LAN

b)

PAN

c)

WAN

d)

SAN

53.

If the processing speed goes from 1GHZ to 4GHZ and the processor is changed from an 8 core to a dual core processor – what is the exact effect on the performance of the computer?

a)

The number of instructions executed per second quadruples

b)

The number of instructions executed per second doubles

c)

The number of instructions executed per second stays the same

d)

The number of instructions executed per second is halved

54.

Which is an example of an Embedded System:

a)

PCs

b)

Washing Machine

c)

Laptops

d)

Tablets

55.

What is held in cache?

a)

All of the programming instructions

b)

Instructions that have been processed

c)

Commonly used instructions and data

d)

Data that hasn’t been used for a long time

56.

Programs that a computer system runs is known as....

a)

Software

b)

Hardware

57.

What is a worm?

a)

A malicious program which replicates by injecting its own code into other files

b)

A malicious program which replicates by making copies of itself and filling up RAM and secondary storage sometimes propagating across a network

c)

A malicious program which masquerades as a legitimate program but causes harmful execution when run

d)

A malicious program which encrypts all of the data on a computer system and demands payment in order to decrypt the data

58.

What is a virus?

a)

A malicious program which replicates by injecting its own code into other files

b)

A malicious program which replicates by making copies of itself and filling up RAM and secondary storage sometimes propagating across a network

c)

A malicious program which masquerades as a legitimate program but causes harmful execution when run

d)

A malicious program which encrypts all of the data on a computer system and demands payment in order to decrypt the data

59.

What is ransomware?

a)

A malicious program which replicates by injecting its own code into other files

b)

A malicious program which replicates by making copies of itself and filling up RAM and secondary storage sometimes propagating across a network

c)

A malicious program which masquerades as a legitimate program but causes harmful execution when run

d)

A malicious program which encrypts all of the data on a computer system and demands payment in order to decrypt the data

60.

What type of social engineering attack is shown in the image?

a)

phishing

b)

vishing

c)

smishing

d)

DDOS

61.

Which storage device stores data using magnetic technology?

a)

Solid state

b)

Internal Hard disk

c)

USB

d)

External hard disk

62.
If the RAM is upgraded from 512MB to 4GB, what will be the biggest benefit?
a)
More programs and data can be opened at the same time
b)
The operating system will be faster
c)
There will be more hard drive space
d)
The computer will be quicker if you open a document
63.

Which storage or memory solution below is used to store the BIOS?

a)

ROM

b)

Secondary Storage

c)

Hard Disk

d)

RAM

64.

Decompress this run-length encoded sequence:

102130

a)

123

b)

000110

c)

011000

d)

010203

65.

What is an advantage of this star network topology

a)

If the central switch breaks it will still work.

b)

The speed of the network remains high as more devices are added.

c)

It does not require much cabling.

d)

Each device is able to communicate with all other devices.

66.

Which of the following character sets holds the most characters?

a)

Unicode

b)

ASCII

c)

Extended ASCII

67.

How is data stored on a HARD DISK DRIVE?

a)

a magnetic charge is applies to sections of a spinning disc, which either attracts or repels a read head, corresponding to 1s and 0s

b)

A laser light scans the surface of the disc and is either reflected or absorbed by pits on the surface, corresponding to 1s and 0s

c)

Carbon nanotubes are arranged in a preconfigured alignment either up/down and left/right, corresponding to 1s ands 0s

d)

A little goblin inside the drive draws prictures and then converts them to 1s and 0s somehow

68.

What subcategory of software does a virus checker belong to.

a)

Operating System

b)

Translators

c)

Utilities

d)

Defragmentation

69.

The range of frequencies that can be transmitted across a network connection is known as...

(a)  

70.

What is the denary equivalent of the hexadecimal number D6?

(a)  

71.

The ASCII code for the numeric character "0" is 48, other numeric characters follow on from this in sequence. What character is represented by the bit pattern 0011 1001 if it is an ASCII code?

(a)  

72.

Convert 0011 1001 into Hexadecimal.

(a)  

73.

Calculate the minimum size of file that could be used to store the bitmap image in the figure above. Express your answer in bytes.

(a)  

74.

Compress the above using Run-Length-Encoding.

(a)  

75.

The processor in Ella’s computer has four cores running at 2.8 GHz and the processor in Josephine’s computer has one core running at 3.2 GHz.


Which computer would be faster at serial processing?

a)

Ella's

b)

Josephine's

76.

Give the full name of RAM.

(a)  

77.

An attribute in one table which is a primary key attribute in another table is a (a)   key

78.

An attribute that will uniquely identify an instance of an entity

a)

Entity

b)

Attribute

c)

Foreign Key

d)

Primary Key

79.

What type of relationship is this?

a)

One to Many

b)

Many to Many

c)

One to One

d)

Many to One

80.

The process of ensuring that a relational database is structured efficiently is called (a)  

81.

The CPU carries out instructions, one after another, billions of times a second is known as...

a)

The Fetch-Execute Cycle

b)

The Fetch-Decode-Execute Cycle

c)

The Fetch-Breakdown-Execute Cycle

d)

The Fetch-Breakdown-Sign out Cycle

82.

RAM is

a)

Volatile

b)

Non-Volatile

83.
A sequence of steps that can be followed to complete a task.
a)
Guideline
b)
Instructions
c)
To do list
d)
Algorithm
84.
This is used to 'dry run' a program to see the value of variables and the program output.
a)
execution
b)
Trace Table
c)
monitoring
d)
testing
85.
A search algorithm that only works on sorted data.
a)
Linear Search
b)
look up search
c)
read through search
d)
Binary Search
86.

This pseudo-code assigns two string values to two variables

title ← 'computer science'

level ← 'gcse'

What is the length of the contents of the variable level

a)

1

b)

2

c)

3

d)

4

87.

title ← 'computer science'

level ← 'gcse'


What is the result of concatenating the variable title with the variable level

a)

computer science gcse

b)

Computer Science GCSE

c)

computersciencegcse

d)

computer sciencegcse

88.
Computers in this network are connected in a line.
a)
Bus Network
b)
Simple Network
c)
Train Network
d)
Straight Network
89.
A technique where each letter in a string is shifted along the alphabet, to hide the meaning of the text.
a)
Julius Cipher
b)
Caesar Cipher
c)
Nero Cipher
d)
Claudius Cipher
90.
The general protocol used on the World Wide Web.
a)
POP3
b)
FTP
c)
HTTP
d)
ASCII
91.
An organisation that provides Internet access to people and companies.
a)
ISP
b)
ASP
c)
IAP
d)
PSI
92.
A network where every computer is connected to every other computer.
a)
Bus
b)
Mesh
c)
Star
d)
Ring
93.

A network where there is no server - all clients are equal.

a)

Bus

b)

Peer To Peer

c)

Client/Server

d)

Mesh

94.
What allows devices to access, or be blocked from accessing a network based on their physical address embedded within the device’s network adapter
a)
MAC address filtering
b)
Firewall
c)
TCP/IP
d)
Anti Virus Software
95.
This layer addresses and packages data for transmission then routes the packets across the network.
a)
Data link layer
b)
Network layer
c)
Application layer
d)
Transport layer
96.
This layer sets up the communication between the two hosts and they agree settings such as ‘language’ and size of packets.
a)
Application layer
b)
Transport layer
c)
Network layer
d)
Data link layer
97.
This is where the network hardware such as the NIC (network interface card) is located. OS device drivers also sit here.
a)
Data link layer
b)
Transport layer
c)
Application layer
d)
Network layer
98.
The unit used to measure network speed.
a)
Bytes per Second (Bps)
b)
MHz
c)
GHz
d)
Bits per Second (bps)
99.
The denary number 15
a)
Hexadecimal "G"
b)
Hexadecimal "F"
c)
Hexadecimal "C"
d)
Hexadecimal "B"
100.
Half a byte.
a)
A MiniByte
b)
A Nibble
c)
A SemiByte
d)
A DemiByte
101.
Occurs when the result of a calculation is too large to fit in the available bits.
a)
Underflow
b)
Overflow
c)
Dropout
d)
Surplus
102.
A character set that uses 2 bytes & can represent any character in any known language
a)
EBCDIC
b)
Encoding
c)
ASCII
d)
Unicode
103.
If both inputs are 1, the output is 1
a)
MAYBE gate
b)
NOT Gate
c)
OR Gate
d)
AND Gate
104.
The circuits that move control signals around the computer
a)
Address Bus
b)
Data Bus
c)
Instruction Bus
d)
Control Bus
105.
Responsible for decoding instructions in the CPU
a)
Arithmetic Logic Unit
b)
Memory Unit
c)
Control Unit
d)
Registers
106.
A computer system that is inside another bigger system, such as a car or a washing machine.
a)
Control System
b)
Expert System
c)
Embedded System
d)
Dedicated System
107.

Convert the decimal number 26 into Hexadecimal.

(a)  

108.

Convert FF from Hexadecimal into binary.

(a)  

109.

Convert FF from hexadecimal into denary.

(a)  

110.

What is the binary result of dividing 10110000 by 4?

(a)  

111.

What is the largest number that can be represented in 7 bits? Leave your answer in denary.

(a)  

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