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WorksheetsGrade 7 FINAL Exam Review
Total questions: 99
Worksheet time: 50mins
What is a computer network?
A system that stores data
A group of interconnected devices that communicate with each other
A single computer used by multiple users
A software program for browsing the internet
Which of the following is NOT a basic component of a computer network?
Router
Modem
Switch
Keyboard
What does LAN stand for?
Large Area Network
Local Area Network
Limited Access Network
Linked Access Network
Which type of network is typically used in a small geographic area like an office or a building?
WAN
PAN
What is a PAN (Personal Area Network) typically used for?
Connecting devices over a large city
Connecting devices within a home or small office
Connecting a person’s devices, such as smartphones and laptops, within a small range
Connecting a network over a global scale
Which of the following is the largest type of computer network?
LAN
MAN
PAN
WAN
The primary purpose of a computer network is to:
Store data
Perform mathematical calculations
Share resources and data between devices
Create digital documents
How does a WAN differ from a LAN?
WAN covers a larger geographic area
WAN is slower than a LAN
WAN connects only two devices, while LAN connects more
WAN is used for personal use, and LAN is used for professional use
Why are computer networks important in everyday life?
They allow data to be stored in one place
They enable communication, resource sharing, and access to the internet
They are used only in large organizations
They eliminate the need for personal computers
Which of the following network types is best suited for connecting devices in a small home or office?
WAN
PAN
LAN
MAN
Which of the above statements is correct?
It typically connects devices over a short distance
It is faster than a LAN
It spans large geographic areas, such as countries or continents and different campus buildings
It is only used for personal home networks
Which network type is typically used to connect an individual's devices like a smartphone, laptop, or tablet?
LAN
PAN
WAN
MAN
What is an example of a Personal Area Network (PAN)?
An office network connecting several computers
A home Wi-Fi network
A Bluetooth connection between a smartphone and a headset
A company network across multiple cities
Which of the following best describes a Personal Area Network (PAN)?
It covers a small geographic area like a building or campus
It spans multiple countries
It relies on satellite connections
It is the slowest type of network
What is a key characteristic of a Wide Area Network (WAN)?
It connects devices over short distances
It uses cables to connect devices
It spans large geographic areas, such as entire countries or continents
It is used primarily in personal homes
Which of the following is a disadvantage of a PAN?
Limited coverage area
High cost of setup
Requires complex hardware
Difficult to secure
Which of these is an advantage of a LAN?
Low setup cost for small organisations
Slow data transmission speeds
A limited number of devices can be connected
High risk of external attacks
What is a typical example of a WAN?
A network within a school
A global network connecting banks across countries
A home Wi-Fi setup
A Bluetooth connection between a smartwatch and a phone
Which of the following is an advantage of a WAN?
Low cost and easy installation
High data transfer rates
Allows organizations to connect over large geographic areas
Limited to a single location
Which of these is a disadvantage of a LAN?
Limited to short-range communication
Slower data transfer speeds than a WAN
Susceptibility to local security threats, such as hacking
Complex to maintain and expand
Which device is most commonly used to establish a connection in a PAN?
Router
Switch
Which of the following best describes a PAN?
A network used in a small home or office
A network connecting personal devices over a short-range
A large network connecting several buildings
A global network spanning multiple countries
What is the disadvantage of a WAN?
Very low data transfer speeds
High cost to set up and maintain
Limited range to a small area like a building
Inability to connect devices across large distances
Which of the following is an example of a LAN?
A network connecting multiple offices in different countries
A Wi-Fi network within a school campus
A connection between a smartwatch and a smartphone
A satellite network providing internet access
13. Which of these is a feature of a PAN?
Covers a small area, typically within a range of a few meters
Connects devices over a large geographical area
Used for connecting computers in different cities
Requires complex infrastructure
What is one advantage of a LAN over a WAN?
It provides better connectivity across long distances
Easier to manage and lower cost
It is faster than WAN over long distances
It requires fewer devices
Which network type is most commonly used in organizations to connect their various branches across different cities or countries?
PAN
LAN
WAN
MAN
Why are PANs not suitable for large networks?
They have limited data transfer speeds
They are designed for short-range connections only
They are very expensive to maintain
They require advanced hardware
Which of the following is a common feature of a WAN?
High data transfer rates across short distances
The ability to connect devices over a large geographic area
Used for personal device connections
Easy setup with minimal cost
A Bluetooth network connecting a smartphone, tablet, and smartwatch is an example of which network type?
PAN
LAN
WAN
MAN
Which of these is a key disadvantage of a LAN compared to a WAN?
It is slower over long distances
It requires more infrastructure to set up
It has a higher security risk
It cannot connect devices across multiple locations
What is the primary advantage of fibre optic cables over copper cables?
Cheaper to install
Higher data transmission speed
Which of the following is an advantage of fibre optic cables over copper cables?
Lower installation cost
Higher data transmission speed
More flexible for indoor use
Uses electrical signals to transmit data
Which of the following is a disadvantage of copper cables?
Less susceptible to signal degradation
More expensive than fibre optic cables
Shorter transmission distances compared to fibre optic cables
Requires special equipment to install
In which scenario would copper cables be more appropriate than fibre optic cables?
Transmitting data over long distances
In areas with high electromagnetic interference
Short-range connections within a building
High-speed internet over large distances
Which statement best describes fibre optic cables?
They transmit data using electrical signals.
They are prone to signal interference from nearby electrical devices.
They can transmit data over long distances without signal loss.
They are more cost-effective than copper cables for all applications.
What is the disadvantage of fibre optic cables compared to copper cables?
Lower data transmission capacity
Susceptibility to electromagnetic interference
More complex installation process
Limited to short-distance communication
Which type of cable is more cost-effective for small, localized networks?
Copper cables
Fiber optic cables
Coaxial cables
None of the above
Which of the following is true about both copper and fibre optic cables?
Both are equally immune to signal interference.
Both are capable of high-speed data transmission.
Both require optical signal converters for data transmission.
Both are commonly used for long-distance data transmission.
What is an echo check-in data transmission?
A method to increase transmission speed
A process of sending a signal back to the sender for verification
A type of encryption method
A technique for compressing data
How does an echo check detect transmission errors?
By comparing the sent and received data
By encrypting the data and then decrypting it
By compressing the data
By skipping any erroneous data during transmission
In an echo check process, what happens if the data sent and the echo received do not match?
The data is automatically corrected
The data is sent again
The system ignores the error
The connection is terminated
Why is error detection important in communication systems?
To reduce data processing time
To ensure accurate data transmission
To increase the size of data packets
To slow down the network traffic
Which of the following best describes the process of an echo check?
Data is compressed and sent to the receiver
Data is sent to the receiver, then immediately returned for comparison
The system calculates a checksum for the data
Data is encrypted and verified on the receiver side
Which scenario best demonstrates the use of echo checks in practice?
A server compressing files before sending them
A user encrypting an email before sending it
A network sending a packet of data and verifying its integrity by receiving the same packet back
A website checking user credentials for logging in
Which of the following is a benefit of using echo checks in communication systems?
It reduces the size of transmitted data
It helps detect transmission errors
What is the primary role of a firewall in a network?
To enhance network speed
To prevent unauthorized access to or from a network
To increase data storage capacity
To compress files before transmission
Which of the following best defines a firewall?
A system designed to block unwanted traffic based on predefined security rules
A device used to boost internet speed
A software that encrypts all data
A program that only monitors outgoing network traffic
Which type of firewall filters data packets based on the source and destination IP address?
Proxy firewall
Stateful inspection firewall
Packet-filtering firewall
Application-layer firewall
How does a firewall contribute to network security?
By compressing data before sending
By blocking malware and preventing unauthorized access
By increasing the bandwidth for faster communication
By encrypting data during transmission
It helps detect transmission errors
It compresses the data to enhance security
It helps detect transmission errors
It encrypts the data to enhance security
It increases the speed of data transfer
Which of the following is NOT a type of firewall?
Packet-filtering firewall
Circuit-level gateway
Hypertext firewall
Proxy firewall
Which of the following are types of firewalls commonly used in network security?
Packet-filtering firewall
Stateful inspection firewall
Proxy firewall
All of the above
In which scenario is a firewall most important for personal use?
When downloading large files
When accessing the internet through a public Wi-Fi network
When sharing a printer between two computers
When installing new software on a computer
What is the key difference between a hardware firewall and a software firewall?
Hardware firewalls are slower than software firewalls
Hardware firewalls are installed in individual devices, while software firewalls protect an entire network
Software firewalls are installed in individual devices, while hardware firewalls protect an entire network
There is no difference between hardware and software firewalls
A firewall that acts as an intermediary between users and the internet, filtering requests
A firewall that encrypts all data before sending it
A firewall that acts as an intermediary between users and the internet, filtering requests
A firewall that only works on local area networks (LANs)
A firewall that blocks all incoming traffic
What is the primary purpose of antivirus software?
To speed up network connections
To detect, prevent, and remove malware
To monitor network traffic
To encrypt sensitive data
How does antispyware software help secure data on a network?
By scanning and removing software designed to secretly collect information
By compressing files before sending them
By encrypting data during transmission
By creating backups of sensitive files
Which of the following is a common threat to data security on a network?
Spam emails
Viruses, worms, and spyware
Power outages
Hardware malfunctions
One key difference between antivirus and antispyware software is:
Antivirus targets viruses, while antispyware targets spyware.
Antispyware is used to remove viruses, while antivirus removes spyware.
Both antivirus and antispyware only protect against malware.
Antivirus and antispyware are exactly the same.
Which action is essential to maintain the effectiveness of antivirus and antispyware software?
Installing the software on only one computer
Regularly updating the software to include the latest threat definitions
Removing the software after the first use
Using it only when connected to a secure network
What is the first step in installing antivirus software on a computer or network?
Downloading the latest threat definitions
Installing antispyware first
Running a complete system scan
Downloading and installing the antivirus software from a trusted source
Which of the following describes a global citizenship perspective on data security?
Securing data only on personal devices
Protecting sensitive data and sharing knowledge about data security best practices worldwide
Using antivirus only in a business environment
Encrypting personal information without informing others
Which of the following threats can antivirus and antispyware software detect?
Phishing attacks
Hardware malfunctions
Malware such as viruses, worms, and keyloggers
Network congestion
What is a key benefit of using both antivirus and antispyware software together on a network?
It speeds up data transmission
It provides comprehensive protection against a wide range of threats, including malware and spyware
It lowers the overall cost of software
It eliminates the need for a firewall
Which of the following best explains the role of regular updates in antivirus and antispyware software?
To increase the speed of network connections
To ensure the software can detect and prevent the latest threats
To allow the software to compress files before sending them
To reduce the system’s processing power
ASCII stands for:
American Standard Code for Information Interchange
Advanced System for Computer Input Integration
Automated Software Code for Internet Interface
Applied Science Code for International Innovation
What does ASCII stand for?
American Standard Code for Internet Interchange
American Symbolic Code for Information Interchange
American Standard Code for Information Interchange
Advanced System Code for Information Interchange
What is the primary purpose of the ASCII table?
To store images in binary format
To assign a unique number to letters, numbers, and symbols
To calculate math problems
To translate languages
How many characters are there in the standard ASCII table?
64
128
256
512
In the ASCII table, what is the numerical value of the letter 'A'?
64
65
97
100
Which of the following characters has the ASCII value 32?
Space
Exclamation mark (!)
What is the ASCII value of the digit '0'?
48
50
65
97
In the ASCII table, lowercase letters have higher values than uppercase letters. What is the ASCII value of the letter 'a'?
65
90
97
120
What does each ASCII value represent?
A sound
A unique color
A specific character or symbol
A binary operation
Which of the following is a non-printable ASCII character?
Tab
Dollar sign ($)
Comma (,)
Plus sign (+)
Which of the following groups of characters is represented by ASCII values 48 to 57?
A. Uppercase letters
B. Lowercase letters
C. Numbers 0–9
D. Punctuation marks
What is the binary equivalent of the ASCII value for the letter 'A'?
1000001
01000001
1100001
01100001
The ASCII value of the space character is 32. What is its binary equivalent?
A. 00100000
B. 01000000
C. 00011110
D. 10100000
The ASCII table assigns each character a unique:
Binary code only
Decimal value only
Binary, decimal, and hexadecimal value
Color code
If the ASCII value of the letter 'a' is 97, what is its binary representation?
01100001
01101001
10100001
11000001
Convert the binary number 01100100 to its corresponding ASCII character.
'A'
'd'
'B'
'z'
The binary code 00110001 represents which digit in the ASCII table?
0
1
2
3
In binary, the ASCII code for 'C' is 01000011. What is its decimal value?
67
68
70
66
How do you write the number 48 in binary?
A. 110000
B. 101000
C. 00110000
D. 110001
Which binary sequence represents the ASCII character '$'?
00100100
01000100
10100100
00101010
What does the binary sequence 01101010 represent in ASCII?
'j'
'l'
'k'
'm'
What is the denary (decimal) equivalent of the binary number 1010?
8
9
10
11
Convert the binary number 1101 to denary.
12
13
14
15
Which of the following binary numbers equals 15 in denary?
A. 1111
B. 1011
C. 1100
D. 1001
The binary number 1000 represents what in denary?
6
7
8
9
How do you write the denary number 5 in binary?
1010
110
101
1001
Convert the binary number 1110 into denary.
14
12
10
16
What is the binary representation of the denary number 7?
111
1000
110
101
Which of these denary numbers matches the binary number 1001?
8
9
10
11
What is the smallest binary number greater than 1000?
1001
1010
1000
1111
Convert the binary number 10110 into denary.
20
21
Which binary number represents the denary value 12?
1010
1110
1100
1000
How many bits are needed to represent the number 15 in binary?
3
4
5
6
