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WorksheetsGrade 8 ICT Exam Revision
Total questions: 100
Worksheet time: 58mins
What is the main function of System Software in a computer system?
To allow users to play games
To control and manage hardware and software resources
To store personal data
To edit text documents
Which of the following is an example of system software?
Web browser
Antivirus software
Operating system
Word processor
What does a computer system's processor (CPU) do?
It stores files and documents
It processes data and executes instructions
It provides a graphical interface
It supplies power to the computer
Which part of a computer is considered the "brain" of the system?
Hard drive
Monitor
Central Processing Unit (CPU)
Keyboard
What is a computer network?
A collection of websites
A group of connected computers that share resources
A method to store data
A device that processes data
What is the purpose of a Local Area Network (LAN)?
Which of the following is a task performed by the processor?
Receiving input from the keyboard
Fetching and executing instructions
Displaying images on the monitor
Providing power to the system
What happens if there is no operating system on a computer?
The computer will turn on but not function properly
The computer will not turn on at all
The computer will still run programs as usual
The computer will only display the image
Which of the following is true about system software?
It helps users write documents
It manages the computer’s hardware and runs application programs
It is optional for a computer to function
It refers to games and other entertainment programs
What is the primary role of an operating system (OS)?
To run games and entertainment programs
To manage files and folders
To control hardware resources and allow software to run
To provide internet connectivity
What is the difference between hardware and software in a computer system?
Hardware is the physical components, while software is the programs and instructions
Hardware refers to external devices, and software is stored on USB drives
Software is tangible, while hardware is not
There is no difference between hardware and software
What type of network connects computers in different cities or countries?
Local Area Network (LAN)
Personal Area Network (PAN)
Wide Area Network (WAN)
Home Area Network (HAN)
Which of the following is the purpose of the memory in a computer system?
To permanently store data for future use
To temporarily hold data and instructions being processed
To display information to the user
To provide power to the computer system
What is the primary role of an operating system?
To design hardware components
To manage hardware resources and allow software to run
To provide power to the system
To connect the computer to the internet
Which of the following is a task performed by an operating system?
Writing documents
Managing memory and processor time
Installing hardware components
Designing software applications
How does an operating system manage hardware devices?
By directly controlling the devices
By acting as an intermediary between applications and the hardware
By running the hardware's built-in software
By disconnecting non-essential devices
Which of the following is an example of an operating system managing storage?
A) Organizing files and folders on the hard drive
B) Running an antivirus program
C) Compressing files for backup
D) Displaying images on the monitor
What does an operating system do when multiple programs are running at the same time?
It crashes the system
It allows only one program to run
How does an operating system manage memory?
By allocating memory to running programs and freeing it when no longer needed
By storing programs permanently
By compressing data in memory
By copying data between RAM and ROM
Which task is performed by the operating system to manage applications?
It automatically creates new applications
It allocates resources to run the applications and terminates them when finished
It stores applications permanently on the disk
It updates applications automatically
What is the function of a file system in an operating system?
It creates new hardware devices
It organizes and manages how data is stored and retrieved on storage devices
It controls network settings
It compresses data automatically
Which of the following is an example of the operating system handling files?
Copying, renaming, and deleting files
Connecting to the internet
Running a web browser
Installing drivers
What is the purpose of device drivers in an operating system?
To allow the operating system to communicate with hardware devices
To store data on external devices
To update the operating system
To increase system performance
How does an operating system handle system security?
By managing user permissions and providing security features like firewalls
By installing antivirus software automatically
What happens if the operating system's memory management fails?
A) Programs may crash or the system may freeze
B) New files cannot be created
C) The computer will automatically reboot
D) The processor will stop working
Which of the following is NOT a task of the operating system?
A) Managing hardware resources
B) Designing software applications
C) Handling file storage and retrieval
D) Running programs in the background
How does the operating system control user access to files and applications?
It automatically creates a backup of user files
It manages user accounts and permissions
It encrypts all files on the system
It deletes old user accounts automatically
What is the primary function of utility programs in a computer system?
To create new hardware devices
To perform maintenance tasks that optimize and protect the system
To write software applications
To replace the operating system
Which of the following is an example of a utility program?
(a)
What is the role of device drivers in a computer system?
To allow the operating system to communicate with hardware devices
To increase the speed of the processor
To update the operating system automatically
To store files permanently
What does a defragmentation tool do in a computer system?
It deletes unnecessary files
It cleans the computer's registry
It reorganizes scattered data on the hard drive to improve performance
It compresses files to save space
Which of the following is an example of security software?
Web browser
Antivirus program
Disk partitioning tool
Graphics card driver
What is the main purpose of antivirus software?
To organize files on the computer
To detect and remove malware from the system
To enhance system speed
To defragment the hard drive
Why are utility programs like firewalls important?
They help improve the graphical quality of games
They monitor and block unauthorized access to the network
They increase the speed of the internet connection
They are used to install new drivers
What does a disk cleanup utility do?
It defragments the hard drive
It removes unnecessary files to free up space
It repairs damaged files
It backs up important data
Which of the following is an example of a file management utility?
Graphics editing software
File compression tool (e.g., WinZip)
Web development tool
Media player
Why is defragmentation important for maintaining a computer’s performance?
It deletes duplicate files
It updates the operating system
It reorganizes fragmented data to speed up file access
It scans for viruses
Which of the following is true about device drivers?
They are used to store files
They ensure the correct operation of hardware devices
They monitor system performance
They defragment the hard drive
It organizes files into folders
What does the term "scalability" refer to in network design?
A) The speed of the network
B) The capacity to be changed in size or scale
C) The security of the network
D) The type of cables used in the network
Which of the following factors can affect the scalability of a network?
A) Distance and amount of data to be transmitted
B) Type of operating system
C) Size of the server
D) Color of the cables
How can the impact of distance on network scalability be mitigated?
A) By using faster processors
B) By using signal boosters or ethernet cables
Why is it important to ensure network scalability?
To reduce the cost of hardware
To ensure the network can grow and handle more data over time
To improve the quality of the internet connection
To reduce the number of users on the network
What is the role of a signal booster in a network?
It amplifies the signal to allow devices further away to connect
It speeds up data processing in the CPU
It secures the data being transmitted
It stores additional network data
Which of the following can improve a weak wireless signal in a network?
Adding a signal booster
Replacing the hard drive
Lowering the bandwidth
Disconnecting other devices
What is the role of a router in a network?
To secure the network from hackers
To receive and forward data, connecting the network to the internet
To store data permanently
To increase the bandwidth of the network
Why might a signal booster be needed in a network?
To increase the download speed of the network
Because the signal does not reach far enough or obstacles are in the way
To lower the cost of network maintenance
To improve the visual quality of web pages
Which of the following is a potential cost factor when designing a network?
Speed of the processor
Operating system version
Adding Wi-Fi boosters or cables to extend the network
The colour of the cables used
What is one reason Wi-Fi might be cheaper than a wired network?
A) New devices can be added without needing additional cables
B) Wi-Fi requires fewer security protocols
C) Wi-Fi networks have unlimited bandwidth
D) Wi-Fi does not need routers
What is the primary purpose of network security?
To increase the speed of the network
To protect data, systems, and networks from unauthorized access, attacks, or damage
To improve the graphics quality of websites
To reduce the cost of hardware
Which of the following is a key factor to consider when implementing network security?
Color of network cables
Accessibility, cost, and data sensitivity
Size of the monitor
Number of devices connected to the network
What is the trade-off between security and accessibility in network design?
More security always improves accessibility
The more secure a system, the harder it might be to access
Security does not affect accessibility
Increased accessibility makes systems more secure
What is the role of firewalls in network security?
To store data on the network
To filter incoming and outgoing traffic as the first line of defence
To increase the speed of data transmission
To manage user passwords
How does encryption help secure a network?
It converts data into a coded format to prevent unauthorized access
It removes viruses from the system
It filters network traffic
Which of the following is a benefit of using a Virtual Private Network (VPN)?
It encrypts internet connections for secure remote access
It increases the bandwidth of the network
It speeds up data processing in the CPU
It secures files on a local computer
What is the function of Access Control Lists (ACLs) in network security?
To boost the internet connection speed
To define permissions for who can access specific resources in a network
To encrypt data in storage
To reduce the cost of maintaining a network
Which type of data would require the highest level of security measures?
Social media posts
Financial or healthcare records
Publicly available data
General business emails
What does multi-factor authentication provide in terms of network security?
A) Faster access to the network
B) Stronger authentication by requiring multiple forms of verification
C) Automatic encryption of all data
D) Unlimited access to network resources
What is the primary role of antivirus software in network security?
To encrypt data
To protect systems from malicious attacks
To manage network traffic
To control user access to resources
A network topology is:
the arrangement of different elements (links, nodes, etc.) in a computer network
a type of computer virus
a programming language used for networking
the speed at which data travels in a network
What is a network topology?
The physical layout/arrangement of devices in a network
The software used to manage network traffic
A method to secure data in a network
The speed at which data is transmitted in a network
In a bus topology, how are the devices connected?
All devices are connected to a single central device
Devices are connected in a closed loop
Devices are connected to a single central cable
Devices are connected wirelessly
Which of the following is a characteristic of a ring topology?
Each device is connected to every other device
All devices are connected to a central hub
Data travels in one direction around a closed loop
Data is transmitted randomly to all devices
What happens if the central hub fails in a star topology?
Only one device loses connection
The entire network is disrupted
Data is rerouted automatically
Only the hub will need to be replaced
Which topology has the advantage of being simple to install but is prone to data collisions?
A) Bus topology
B) Ring topology
C) Star topology
D) Mesh topology
Which of the following is an advantage of the star topology?
What is the disadvantage of the bus topology?
It requires a lot of cabling
It is difficult to add new devices
It has low data collision rates
If the main cable fails, the entire network fails
How does a ring topology handle data transmission?
Data is sent directly from one device to another without interruption
Data travels in both directions around the loop
Data travels in one direction, and each device passes it along until it reaches the destination
Data is broadcast to all devices at once
Which of the following is a key disadvantage of a star topology?
High cost due to the use of a central hub
Low fault tolerance because all devices share the same connection
Slow data transfer rates
Difficulty in troubleshooting network issues
What is the advantage of a ring topology over a bus topology?
It is easier to add new devices
It has no data collisions, making it more efficient
It uses fewer cables than a bus topology
It is more reliable in case of a central device failure
What is the primary purpose of a parity bit?
To increase the speed of data transmission
To compress data for storage
To detect errors in data transmission
To encrypt data for security
In even parity, what happens if the total number of 1s in the data and parity bit is odd?
Data is accepted as correct
A parity bit is added to make the total even
Data is compressed to remove the extra 1s
No action is taken
Which type of parity requires the total number of 1s, including the parity bit, to be odd?
Even parity
Odd parity
Error parity
Reverse parity
If a parity bit is used and an error occurs during data transmission, what is the main limitation of parity error detection?
It cannot detect any errors
It can only detect errors but cannot correct them
It can correct errors but not detect them
It adds significant delays in transmission
How does a parity bit detect an error in a transmitted data packet?
What type of errors can a single parity bit detect?
Single-bit errors only
Multiple-bit errors only
Both single-bit and multiple-bit errors
No errors at all
Which of the following is a major disadvantage of parity bits in error detection?
They require complex hardware
They cannot detect multiple-bit errors
They reduce the reliability of the data
They increase data transmission time significantly
If a system uses even parity and a data packet contains the bits 1011011, what would be the parity bit?
0
1
2
Cannot be determined
What is the primary role of a protocol in data transmission?
To provide encryption for secure communication
To define rules and standards for data exchange between devices
Which of the following is a fundamental function of the TCP/IP protocol?
Securing data with encryption
Managing hardware devices
Breaking data into packets and ensuring their reliable delivery
Compressing data to save bandwidth
How does TCP ensure reliable data transmission?
By encrypting all data packets
By confirming the receipt of each packet and retransmitting lost packets
By compressing data to reduce transmission time
By using shorter data packets
What is the relationship between TCP and IP in the TCP/IP protocol suite?
TCP handles hardware communication, while IP handles software communication
TCP manages application data, while IP handles addressing and routing packets
TCP encrypts data, while IP ensures secure delivery
TCP and IP are identical protocols with no distinct roles
Which protocol in the TCP/IP suite is responsible for ensuring packets are routed to the correct destination?
TCP
HTTP
IP
FTP
IP stands for:
Internet Protocol
Internal Process
Input Port
Information Path
What does TCP stand for?
Transmission control protocol
Transfer control people
Transfer control protocol
None of the above
What is the primary focus of Industry 4.0?
Manual labour-intensive production processes
Integration of advanced digital technologies in manufacturing
Minimizing automation in industrial settings
Increasing fossil fuel consumption in industries
Which of the following is an example of Machine Learning in Industry 4.0?
Robots performing repetitive tasks without adaptation
A system that learns from production data to optimize efficiency
A factory that exclusively relies on human workers
Manual scheduling of production tasks
What role does Machine Learning play in predictive maintenance?
Predicting the design of new machines
Analyzing data to forecast when a machine might fail
Automating repairs without human intervention
Reducing the need for maintenance entirely
How does Machine Learning contribute to quality control in manufacturing?
By replacing all workers with robots
By identifying defects in products through automated data analysis
Internet provider
Internet Protocol
Internet people
None of the above
Which of the following is an appropriate use of a spreadsheet model?
Creating a dynamic simulation for financial forecasting
Storing and querying large volumes of unstructured data
Generating static reports without calculations
Managing relational data across multiple tables
What does the MAX function in a spreadsheet do?
Calculates the average of a range of cells
Finds the largest value in a range of cells
Adds up all the values in a range of cells
Counts the number of numeric values in a range of cells
In a spreadsheet, the formula =MIN(A1:A10) will:
Return the smallest value in the range A1 to A10
Return the sum of all values in the range A1 to A10
Display the difference between the largest and smallest values in the range
Count the number of cells with numeric values in the range
What is the purpose of naming a cell in a spreadsheet?
To organise data in alphabetical order
To make formulas easier to understand and reference
Which of the following is the correct formula to find the number of numeric values in a range?
=SUM(A1:A10)
=COUNT(A1:A10)
=COUNTA(A1:A10)
=MAX(A1:A10)
If you need to calculate the smallest value in a range and ignore blank cells, which function should you use?
=MAX(A1:A10)
=MIN(A1:A10)
=COUNTA(A1:A10)
=SUM(A1:A10)
Why are spreadsheet models widely used in business environments?
They require no training or knowledge to use
They can automate repetitive calculations and analysis
They replace databases in all cases
They eliminate the need for software like word processors
What is a cell in Google Sheets?
A. A collection of worksheets
B. The intersection of a row and a column
C. A formula used for calculations
D. A group of charts
Which of the following is an example of a cell reference?
A. A1
B. SUM
C. Sheet1
D. Data Range
Which of the following is a basic operation in Google Sheets?
= Average(A1:A5)
= A1 + B1
= COUNTIF(B2:B10, ">5")
= FILTER(A1:B5, A1:A5 > 10)
The formula =COUNT(A1:A10) will:
Count all non-empty cells
Count only cells containing text
Count only cells containing numbers
Count empty cells
