56 Questions
What is the primary function of cache memory?
To synchronize with high-speed CPU and improve its performance
What is a hard disk?
A rigid magnetic disc that stores data permanently
What is another name for a pen drive?
USB flash drive
What is the primary use of a pen drive?
To store and transfer data between computers
What is the shape of a compact disk?
A round medium disk
Who co-developed the concept of a compact disk?
Philips and Sony
What is the primary function of a touchpad?
To control the cursor on the screen using a finger
What type of mouse is more reliable and requires less maintenance?
Optical mouse
What is the main advantage of a cordless mouse?
It does not require a cable to operate
What is the primary function of an optical scanner?
To scan pictures and pages of text as input
What is the name of the technology used in cordless mice to control the movement of the cursor?
All of the above
What is the main difference between a mechanical mouse and an optical mouse?
The type of technology used to track its movement
What is the function of the light-sensitive detector in a light pen?
To enable the user to point to or select objects on the display screen
What is the primary function of a touch screen?
To control the cursor on the screen using a finger
What is the main advantage of using a touchpad over a mouse?
It requires less desk space
What is the main limitation of using a light pen?
It is not compatible with LCD screens
What is the primary function of a processor in a computer system?
To convert measurements into quantity and price
What are the three main building blocks of a computer system?
CPU, memory, and output devices
What is the primary function of an input device in a computer system?
To send data, information, or control signals to the CPU
What is the most common type of keyboard used with computers?
QWERTY keyboard
What is the primary function of a mouse in a computer system?
To move the cursor or pointer on the screen
What is the main advantage of the DVORAK keyboard layout?
It reduces finger movement while typing to increase typing speed
What is the function of a trackball mouse?
To move the cursor or pointer on the screen using a ball mechanism
What is the main difference between the AZERTY and QWERTY keyboard layouts?
The placement of the letters and emphasis on accents
What is the primary function of the CPU in a computer system?
To process data and produce output
What are the five main components of a computer system?
Input devices, CPU, memory, output devices, and secondary storage
What is the main characteristic of a Daisy Wheel Printer?
It uses a wheel with spokes and metal characters to print.
What is the main advantage of a Dot Matrix Printer?
It has a high speed of around 200-500 characters per second.
What is the mechanism used by an Inkjet Printer to print images and characters?
It sprays fine, ionized drops of ink onto the paper.
What is the main characteristic of a Laser Printer?
It uses a laser beam to draw the image on the drum.
What is the main advantage of a Plotter?
It can handle large-format prints and deliver precise output.
Which type of printer is commonly used in fields like engineering, architecture, and graphic design?
Plotter
What is the resolution of a Laser Printer?
At least 600 dots per inch (dpi)
What is the mechanism used by a Dot Matrix Printer to print characters?
It strikes the ink ribbon against the paper with a print head.
What is the main difference between a Plotter and a Printer?
A Plotter uses a pen or marker to draw, while a Printer uses ink or toner.
What is the main disadvantage of a Daisy Wheel Printer?
It is slow and noisy.
What is the primary function of a joystick?
To control the cursor or pointer on a screen
What is the purpose of a microphone?
To input sound into a computer
What is MICR used for?
To read text printed with magnetic ink
What is the main function of a monitor?
To display the processed data or information
What is the primary function of speakers?
To transform electrical impulses into audible sounds
What is the purpose of a projector?
To display the output of a computer onto a large surface
What is the primary function of a printer?
To produce hard copies of the processed data
What type of ink is used in MICR technology?
Magnetic ink
What is the purpose of a computer output device?
To display the result of the processing of raw data
What is the advantage of using speakers in a computer system?
To improve the multimedia experience by providing high-quality audio output
What is the primary function of the Central Processing Unit (CPU)?
To carry out all the important functions of a computer
What is the Arithmetic Logic Unit (ALU) responsible for?
Carrying out arithmetic and logical operations
What is the Control Unit (CU) responsible for?
Controlling the overall performance of the computer system
What is the primary function of the Memory or Storage Unit?
To maintain instructions, data, and intermediate outcomes
What is ROM (Read Only Memory)?
A type of memory that can only be read
What is the primary function of RAM (Random Access Memory)?
To act as an internal memory of the CPU
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?
It allows the CPU to access data more quickly
What is the CPU responsible for executing?
Instructions from both the hardware and software
What is the primary function of the ALU in a CPU?
To perform arithmetic and logical operations
Study Notes
Computer Components
- Computers process both analog and digital data
- Processors are used in various applications like petrol pumps, airplanes, hospitals, and scientific equipment
Main Computer Components
-
Input devices: Enable user to send data/information/control signals to the computer
- Keyboard: Used to enter data, different keyboard layouts like QWERTY, AZERTY, DVORAK
- Mouse: Hand-held device to move cursor, types include trackball, mechanical, optical, wireless
- Touchpad: Found in laptops to control cursor using finger
- Touchscreen: Display that allows interaction using fingers
- Scanners, digital cameras, light pens, joysticks, microphones are other input devices
-
Output Devices: Display processed data as text, images, audio, or video
- Monitor: Main display unit for computers
- Speakers: Transform electrical impulses to audible sound
- Projector: Projects output onto a large screen
- Printers: Produce hard copies of data, types include daisy wheel, dot matrix, inkjet, laser
- Plotter: Creates high-quality, accurate graphics and drawings
-
Central Processing Unit (CPU)
- Executes instructions and coordinates all computer components
- Has Arithmetic Logic Unit (ALU) for computations and Control Unit (CU) to manage operations
-
Memory/Storage
- ROM (Read-Only Memory): Stores permanent data and programs
- RAM (Random Access Memory): Temporary storage for data and programs being used### Cache Memory
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Cache memory is a high-speed memory that is small in size but faster than the main memory (RAM).
-
The CPU can access it more quickly than the primary memory, making it ideal for synchronizing with high-speed CPU and improving its performance.
Hard Disk
- A hard disk is a rigid magnetic disc used for storing data.
- Data is permanently stored on the disk, which is located within a drive unit.
Pen Drive
- A pen drive is a compact secondary storage device.
- It is also known as a USB flash drive, thumb drive, or jump drive.
- It connects to a computer via a USB port and is used to store and transfer data between computers.
- It is commonly used to store and transfer files, documents, pictures, music, and videos.
Compact Disk (CD)
- A Compact Disk is a portable secondary storage device in the shape of a round medium disk.
- It is made of polycarbonate plastic and was co-developed by Philips and Sony in 1980.
Learn about the main components of a computer, including input devices like keyboards and mice, and their applications.
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