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GCSE Computer Science (Revision Unit 1) Flashcards | StudBud
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GCSE Computer Science (Revision Unit 1)
How does cache memory improve CPU performance?
How does a virus differ from a worm?
GCSE Computer Science (Revision Unit 1)
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1
How does a virus differ from a worm?
A worm spreads automatically without user action
A virus only affects text documents
A worm requires human interaction to spread
A virus is always more dangerous than a worm
2
How does
cache memory
improve CPU performance?
By managing input/output operations
By storing frequently accessed data for quick retrieval
By increasing the clock speed
By expanding the main memory capacity
3
What is the primary function of the Arithmetic Logic Unit (ALU) within the CPU?
Perform arithmetic and logical operations
Manage data flow between CPU and memory
Decode program instructions
Store data temporarily
4
What is a brute-force attack?
A virus that spreads through email
A technique to intercept network traffic
A method that repeatedly guesses passwords using a dictionary
A program that encrypts files until a ransom is paid
5
What is the role of
user management
in an operating system?
To handle network connections
To control user access and permissions
To manage system updates
To manage hardware resources
6
Which type of user interface relies solely on text-based commands?
Voice-Activated Interface
Menu-Driven Interface
Command-Line Interface (CLI)
Graphical User Interface (GUI)
7
In the Von Neumann architecture, which component is responsible for decoding instructions?
Control Unit (CU)
Accumulator
Arithmetic Logic Unit (ALU)
Cache
8
What is the main reason for using compression in files?
To reduce file size
To increase file quality
To improve security
To make files easier to edit
9
Which component of the operating system handles communication between hardware devices and the system?
Device drivers
Shell
File system
Kernel
10
Which of the following statements about bandwidth is true?
Bandwidth is measured in milliseconds
Higher bandwidth increases network congestion
Bandwidth is only important for wireless networks
Bandwidth determines the amount of data that can be transferred at a time
11
What is the primary function of the Domain Name System (DNS) in networking?
To manage network protocols
To translate domain names into IP addresses
To assign MAC addresses to devices
To establish peer-to-peer connections
12
What is the main advantage of using fiber optic cables over copper cables in networking?
Higher flexibility
Resistance to electromagnetic interference
Easier installation
Lower cost
13
Which of the following is a characteristic of a peer-to-peer network?
Requires a dedicated server
Requires a dedicated server
Centralized control over data and resources
Each computer can act as both client and server
14
Why might a network experience packet loss?
The computer's processor is too slow
The network is using an antivirus program
The user has opened too many applications
Data is corrupted during transmission due to interference
15
What is the purpose of
data compression
utilities?
C) To encrypt files for security
To reduce file sizes for efficient storage and transmission
To increase file sizes for better quality
To duplicate files for backup purposes
16
Which storage technology uses
magnetic
methods to read and write data?
Hard Disk Drive (HDD)
Solid State Drive (SSD)
Flash Drive
Optical Disc
17
Which protocol is responsible for assigning IP addresses dynamically to devices on a network?
HTTP
DHCP
FTP
DNS
18
Why is encryption important in cybersecurity?
It prevents data from being lost
It makes data unreadable without the correct key
It speeds up network connections
It reduces the risk of software crashes
19
Which of the following is an example of malware?
A weak password
A defective operating system update
A Trojan horse program
A poorly configured firewall
20
Which type of memory is
volatile
and loses its data when power is turned off?
Flash Memory
Hard Disk Drive (HDD)
Read-Only Memory (ROM)
Random Access Memory (RAM)
21
How can network latency be reduced?
By using an older router
By using a fiber optic connection
By reducing the number of servers
By increasing the number of devices on the network
22
Which of these factors affects network speed?
The type of data stored on the computer
The number of devices connected
The brand of the operating system
The screen resolution of the monitor
23
What is the primary purpose of
virtual memory
in a computer system?
To extend the apparent size of RAM using disk space
To store the BIOS settings
To improve graphics performance
To increase the speed of the CPU
24
Which of the following is a characteristic of lossy compression?
It permanently removes some data to reduce file size
Data can be perfectly restored after compression
It is used for compressing executable files
It makes files larger
25
Which of the following is
not
a primary function of an operating system?
Handling file management
Providing a user interface
Managing hardware resources
Compiling application code
26
What is the main function of penetration testing?
To simulate attacks and find vulnerabilities
To encrypt files
To recover lost data
To fix security flaws in the system
27
In a client-server network, what is the primary role of the server?
To monitor network traffic
To act as a backup device
To provide resources and services to clients
To request services from other computers
28
Why are zero-day attacks difficult to prevent?
They always require physical access to the device
They target newly discovered security vulnerabilities
They do not require internet access
They only occur in offline systems
29
How does an operating system facilitate
multitasking
?
By running multiple CPUs simultaneously
By using multiple operating systems concurrently
By rapidly switching between tasks, giving the illusion of parallelism
By allocating separate memory modules to each task
30
Which protocol is used to send emails?
SMTP
HTTP
POP3
FTP
31
What does the term "latency" refer to in network performance?
The speed at which data is processed
The amount of data that can be transmitted in a given time
The time delay between data transmission and reception
The number of data packets lost during transmission
32
Which file type commonly uses lossless compression?
PNG
MP4
MP3
JPEG
33
How does a Virtual Private Network (VPN) enhance security over a public network?
By reducing latency
By encrypting data transmissions
By compressing data
By increasing bandwidth
34
How does
encryption software
enhance data security?
By creating backup copies of files
By converting data into a coded format, readable only by authorized users
By compressing files to save space
By removing malicious software
35
In the context of operating systems, what does the term
'kernel'
refer to?
A security feature of the OS
The graphical component of the OS
A type of utility software
The core component that manages system resources
36
Which register holds the address of the next instruction to be fetched in the CPU?
Memory Address Register (MAR)
Current Instruction Register (CIR)
Program Counter (PC)
Memory Data Register (MDR)
37
Which utility software is used to rearrange data on a hard disk to improve performance?
Disk cleanup
Encryption tool
Defragmentation tool
Compression software
38
Which of the following is an example of social engineering?
A person pretending to be IT support to gain login details
A computer slowing down due to a malware infection
A hacker using SQL injection
A virus that automatically deletes files
39
In the context of network security, what does the term "phishing" refer to?
A technique to intercept data packets
A technique to intercept data packets
A method of stealing sensitive information by pretending to be trustworthy
An attack that floods a network with excessive traffic
40
Q2:
What is the main purpose of
memory management
in an operating system?
To manage data storage on the hard drive
To allocate processor time to applications
To allocate and monitor RAM usage by applications
To control input and output devices
41
Which topology connects each node to every other node, providing multiple pathways for data transmission?
Mesh
Ring
Star
Bus
42
What is the main purpose of a firewall?
To delete viruses from the computer
To monitor CPU temperature
To block unauthorized network access
To speed up the internet connection
43
Which of the following is an example of
non-volatile
memory?
Registers
Cache
ROM
RAM
44
Which factor does
not
directly affect the performance of a CPU?
Size of cache memory
Size of the hard disk drive
Clock speed
Number of cores
45
What is the role of the HTTP protocol?
To send and receive emails
To transfer web pages over the internet
To store large files
To encrypt online communications
46
Which network protocol is used to securely transfer files over the internet?
SSH
HTTPS
SFTP
FTP
47
How does increasing the clock speed of a CPU affect its performance?
Increases the number of instructions per second
Decreases the number of instructions per second
Reduces the heat generated by the CPU
Lowers the power consumption
48
What is the difference between TCP and UDP?
UDP is slower but more reliable
There is no difference between TCP and UDP
TCP is connectionless, while UDP ensures reliable delivery
TCP ensures reliable delivery, while UDP is faster but less reliable
