GCSE Computer Science WJEC 2026 – Actual Exam Review + 170
Practice Questions
1. What is a computer system?
A. A type of software
B. Computer systems
C. A network
D. Hardware only
Rationale: A computer system is the combination of hardware and software working together.
2. What 4 parts of the computer does the CPU connect to?
A. USB, HDMI, Audio, Modem
B. Ports, RAM, Storage
C. Monitor, Keyboard, Mouse, Printer
D. None of the above
Rationale: The CPU interfaces with ports, RAM, and storage to process and transfer data.
3. What two parts make up a computer system?
A. Hardware and software
B. Input and Output
C. RAM and CPU
D. Operating System and Applications
Rationale: A computer system consists of physical components (hardware) and
instructions/code (software).
4. What is hardware?
A. Programs that run the computer
B. Physical parts that make up a computer system
C. Only the CPU
D. Only input/output devices
Rationale: Hardware includes tangible components like CPU, RAM, keyboard, etc.
,5. What is software?
A. Memory and storage
B. The code that makes the computer run
C. The power supply
D. The monitor
Rationale: Software consists of programs and instructions that the computer executes.
6. What is the data bus used for?
A. Sending data to the printer
B. Communication between the RAM and the CPU
C. Internet connection
D. Storing data permanently
Rationale: The data bus carries data between RAM and the CPU for processing.
7. What is the address bus used for?
A. Communicating with USB
B. Sending data to GPU
C. Communication between the RAM and Storage
D. Displaying output
Rationale: The address bus tells RAM which storage location the CPU wants to access.
8. What is the Ethernet port used for?
A. Connecting a monitor
B. Charging devices
C. Internet
D. Sound transfer
Rationale: Ethernet ports connect devices to a network for internet or LAN access.
9. What is the USB port used for?
A. Only charging
B. Transfer data
C. Display video
D. Audio input
,Rationale: USB ports allow connection and data transfer between devices.
10. What is the DVI port used for?
A. Audio only
B. Just video transfer
C. Video and sound transfer
D. Data transfer
Rationale: DVI ports transmit only video signals to monitors.
11. What is the HDMI port used for?
A. Data only
B. Video only
C. Video and sound transfer
D. Audio only
Rationale: HDMI carries both high-definition video and audio.
12. What is the Audio port used for?
A. Video
B. Audio transfer
C. Data transfer
D. Internet
Rationale: Audio ports are designed for speakers, headphones, and microphones.
13. How do input devices work in a computer system?
A. Display data
B. Process data
C. Input data into the computer system
D. Store data permanently
Rationale: Input devices allow users to enter data for processing.
14. What is the main reason for processes in a computer system?
A. To store data
, B. Inputted data is converted into a readable form
C. To backup files
D. To connect to the internet
Rationale: Processes transform raw input into meaningful output.
15. What do output devices do in a computer system?
A. Input data
B. Store data
C. Show the processed data to the user
D. Convert data
Rationale: Output devices present information after processing.
16. List some input devices:
A. Keyboard, Mouse, Joystick, Microphone, Scanner, Graphics tablet and stylus, Bar code
recognition, Optical mark recognition, Sensors
Rationale: Input devices capture information for the computer to process.
17. What are the advantages and disadvantages of a Graphics tablet and stylus?
+ More natural, Greater accuracy and precision
- Expensive, Hard to select and click on items, Large
Rationale: Tablets offer precise input but can be costly and bulky.
18. What are the advantages and disadvantages of a Bar code recognition scanner?
+ Fast, Shows error, Can change price easily
- Products must be entered into database, If system fails they don't work
Rationale: Scanners speed up checkout but depend on proper database management.
19. What are the advantages and disadvantages of an Optical mark recognition scanner?
+ Very fast, Accurate
- Can't analyze human errors, No text, Needs special paper and stationery
Practice Questions
1. What is a computer system?
A. A type of software
B. Computer systems
C. A network
D. Hardware only
Rationale: A computer system is the combination of hardware and software working together.
2. What 4 parts of the computer does the CPU connect to?
A. USB, HDMI, Audio, Modem
B. Ports, RAM, Storage
C. Monitor, Keyboard, Mouse, Printer
D. None of the above
Rationale: The CPU interfaces with ports, RAM, and storage to process and transfer data.
3. What two parts make up a computer system?
A. Hardware and software
B. Input and Output
C. RAM and CPU
D. Operating System and Applications
Rationale: A computer system consists of physical components (hardware) and
instructions/code (software).
4. What is hardware?
A. Programs that run the computer
B. Physical parts that make up a computer system
C. Only the CPU
D. Only input/output devices
Rationale: Hardware includes tangible components like CPU, RAM, keyboard, etc.
,5. What is software?
A. Memory and storage
B. The code that makes the computer run
C. The power supply
D. The monitor
Rationale: Software consists of programs and instructions that the computer executes.
6. What is the data bus used for?
A. Sending data to the printer
B. Communication between the RAM and the CPU
C. Internet connection
D. Storing data permanently
Rationale: The data bus carries data between RAM and the CPU for processing.
7. What is the address bus used for?
A. Communicating with USB
B. Sending data to GPU
C. Communication between the RAM and Storage
D. Displaying output
Rationale: The address bus tells RAM which storage location the CPU wants to access.
8. What is the Ethernet port used for?
A. Connecting a monitor
B. Charging devices
C. Internet
D. Sound transfer
Rationale: Ethernet ports connect devices to a network for internet or LAN access.
9. What is the USB port used for?
A. Only charging
B. Transfer data
C. Display video
D. Audio input
,Rationale: USB ports allow connection and data transfer between devices.
10. What is the DVI port used for?
A. Audio only
B. Just video transfer
C. Video and sound transfer
D. Data transfer
Rationale: DVI ports transmit only video signals to monitors.
11. What is the HDMI port used for?
A. Data only
B. Video only
C. Video and sound transfer
D. Audio only
Rationale: HDMI carries both high-definition video and audio.
12. What is the Audio port used for?
A. Video
B. Audio transfer
C. Data transfer
D. Internet
Rationale: Audio ports are designed for speakers, headphones, and microphones.
13. How do input devices work in a computer system?
A. Display data
B. Process data
C. Input data into the computer system
D. Store data permanently
Rationale: Input devices allow users to enter data for processing.
14. What is the main reason for processes in a computer system?
A. To store data
, B. Inputted data is converted into a readable form
C. To backup files
D. To connect to the internet
Rationale: Processes transform raw input into meaningful output.
15. What do output devices do in a computer system?
A. Input data
B. Store data
C. Show the processed data to the user
D. Convert data
Rationale: Output devices present information after processing.
16. List some input devices:
A. Keyboard, Mouse, Joystick, Microphone, Scanner, Graphics tablet and stylus, Bar code
recognition, Optical mark recognition, Sensors
Rationale: Input devices capture information for the computer to process.
17. What are the advantages and disadvantages of a Graphics tablet and stylus?
+ More natural, Greater accuracy and precision
- Expensive, Hard to select and click on items, Large
Rationale: Tablets offer precise input but can be costly and bulky.
18. What are the advantages and disadvantages of a Bar code recognition scanner?
+ Fast, Shows error, Can change price easily
- Products must be entered into database, If system fails they don't work
Rationale: Scanners speed up checkout but depend on proper database management.
19. What are the advantages and disadvantages of an Optical mark recognition scanner?
+ Very fast, Accurate
- Can't analyze human errors, No text, Needs special paper and stationery
