55 Questions
What is the primary function of a trackball?
To move the pointer on the screen using a ball and sensor.
What is the main advantage of an optical mouse over a mechanical mouse?
It is more reliable and requires less maintenance.
What is the primary function of a touchpad?
To allow the user to control the cursor on the screen using their finger.
What is the primary function of a touch screen?
To allow the user to interact with the device using their finger.
What is the primary function of an optical scanner?
To scan pictures and documents and convert them into digital format.
What is the primary function of a digital camera?
To capture images and record videos digitally.
What is the primary function of a light pen?
To point to or select objects on the display screen.
What is a common drawback of mechanical mice?
They are prone to dust and require regular cleaning.
What is a characteristic of cordless or wireless mice?
They use wireless technology to control the movement of the cursor.
What is a consideration when using an optical mouse?
The surface on which it is used can affect its performance.
What is the primary purpose of cache memory?
To synchronize with high-speed CPU and improve its performance
What is a characteristic of a hard disk?
It is a rigid magnetic disc that permanently stores data
What is another name for a pen drive?
USB flash drive
What is the shape of a compact disk?
Circular
What is the material used to make a compact disk?
Polycarbonate plastic
What is the benefit of using a pen drive?
It is commonly used to store and transfer data between computers
What is the primary function of a processor in a computer system?
To convert analogue data into digital data
Which of the following is NOT a main component of a computer system?
Printer
What is the primary feature of a Daisy Wheel Printer?
It has a wheel or disk with spokes or extensions and molded metal characters.
What is the primary advantage of a Dot Matrix Printer over a Daisy Wheel Printer?
It is faster and more quiet.
What is the purpose of an input device in a computer system?
To send data or information to the computer
Which type of keyboard is considered the standard French keyboard?
AZERTY
What is the primary function of the print head in an Inkjet Printer?
To spray fine ionized drops of ink onto the paper.
What is the primary advantage of the DVORAK keyboard layout?
It reduces finger movement while typing
What is the primary difference between a Laser Printer and an Inkjet Printer?
The method of printing characters.
What is the function of a mouse in a computer system?
To move the cursor or pointer on the screen
What is the primary use of a Plotter?
To generate high-quality, accurate, and detailed graphics.
What is the primary characteristic of a Laser Printer?
It uses a laser beam to print characters.
What is a common feature of some mouse devices?
Extra buttons to perform different functions
What is the primary function of primary memory in a computer system?
To store data temporarily
What is the primary advantage of a Laser Printer over an Inkjet Printer?
It uses powdered toner for printing.
What is the main difference between QWERTY and AZERTY keyboards?
The placement of letters and emphasis on accents
What is the primary function of the drum in a Laser Printer?
To draw the image on the drum using a laser beam.
What is the function of a trackball mouse?
To move the cursor or pointer on the screen using a ball mechanism
What is the primary difference between a Plotter and a Printer?
The use of a pen or marker to draw continuous lines.
What is the primary advantage of a Plotter over a Printer?
It is capable of handling large-format prints and delivering precise output.
What is the primary function of a joystick?
To control the cursor or pointer on a screen
What is the main purpose of a microphone?
To input sound into a computer
What is the primary function of Magnetic Ink Character Recognition (MICR)?
To read text printed with magnetic ink
What is the primary function of a monitor?
To display the output of a computer
What is the primary function of speakers?
To transform electrical impulses into audible sounds
What is the primary function of a projector?
To display the output of a computer on a screen
What is the primary function of a printer?
To produce hard copies of processed data
What is the primary function of a joystick?
To control the cursor or pointer on a screen
What is another name for the Central Processing Unit (CPU)?
Microprocessor
What is the primary function of Magnetic Ink Character Recognition (MICR)?
To read text printed with magnetic ink
What is the primary function of a monitor?
To display the output of a computer
What does the CPU carry out in a computer?
All important functions of a computer
What is the main function of the Arithmetic Logic Unit (ALU)?
To carry out arithmetic and logical operations
What is the Control Unit (CU) responsible for?
The overall performance of a computer
What is the primary function of the memory or storage unit?
To maintain instructions, data, and intermediate outcomes
What is the main difference between ROM and RAM?
ROM can only be read, while RAM can be written and read
What happens to the data in RAM when the computer is shut down?
The data is lost
What is the benefit of loading data into RAM?
Reading data from RAM is much faster than reading from the hard drive
What is the primary function of the CPU in a computer system?
To receive instructions and produce output
Study Notes
Computer Components
- Computers process both analogue and digital data
- Processors are used in various applications like petrol pumps, airplanes, hospitals, and scientific applications
Main Computer Components
- Input devices (e.g. keyboard, mouse, touchpad, touch screen)
- Central Processing Unit (CPU)
- Output devices (e.g. monitor, speakers, projector, printer)
- Primary memory (RAM, ROM)
- Secondary storage (hard drives, SSDs)
Input Devices
- Keyboard: QWERTY, AZERTY, DVORAK layouts
- Mouse: Trackball, Mechanical, Optical, Cordless/Wireless
- Touchpad: Found in laptops, allows cursor control with finger
- Touch Screen: Allows direct interaction with display
- Scanner: Converts physical documents/images to digital form
- Digital Camera: Captures and stores images/videos digitally
- Light Pen: Pen-shaped input device, detects screen location
- Joystick: Used for cursor control, common in gaming
- Microphone: Converts sound to digital audio signals
- MICR: Reads magnetically-inked text, used for cheque processing
Output Devices
- Monitor: CRT, LCD, LED, Plasma displays
- Speakers: Produce audio output
- Projector: Projects computer output onto large screen
- Printer: Daisy wheel, Dot matrix, Inkjet, Laser printers
- Plotter: Creates high-quality, precision graphical output
Central Processing Unit (CPU)
- Carries out instructions, performs calculations, manipulates data
- Arithmetic Logic Unit (ALU): Performs arithmetic and logical operations
- Control Unit (CU): Coordinates and controls other computer components
Memory/Storage
- ROM (Read-Only Memory): Permanently stores data/programs
- RAM (Random Access Memory): Volatile memory, stores active data/programs### Cache Memory
- High-speed memory, small in size, but faster than main memory (RAM)
- Allows CPU to access it quickly, improving performance
- Synchronizes with high-speed CPU
Hard Disk
- Rigid magnetic disc used to store data
- Permanently stores data and is located within a drive unit
Pen Drive
- Compact secondary storage device
- Known as USB flash drive, thumb drive, or jump drive
- Connects to a computer via a USB port
- Used to store and transfer data between computers
- Can store documents, pictures, music, videos, and more
Compact Disk (CD)
- Portable secondary storage device in the shape of a round medium disk
- Made of polycarbonate plastic
- Co-developed by Philips and Sony in 1980
This quiz covers the basics of computer components, including input devices, CPU, output devices, primary memory, and secondary storage. Learn about the different types of computer components and their functions.
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