16 Questions
What is the primary function of the numeric keypad?
To enter numeric data or cursor movement
What are the two sizes of keyboards available?
84 keys and 101/102 keys
What is the purpose of function keys on a keyboard?
To perform specific functions
What is the purpose of a joystick?
To move the cursor on a monitor screen
What is the purpose of a light pen?
To select a displayed menu item or draw pictures
What is the purpose of a scanner?
To work like a photocopy machine
What is the purpose of a microphone?
To input sound and store it digitally
What is the most popular pointing device?
Mouse
What is the main application of Magnetic Ink Card Reader (MICR) in banks?
To process large number of cheques
What is the function of Optical Character Reader (OCR)?
To scan and convert printed text into machine readable code
What is the advantage of Flat-Panel Display Monitor over Cathode-Ray Tube (CRT)?
Reduced volume, weight, and power requirement
What is the characteristic of Impact Printers?
Very low consumable costs, very noisy
What is the function of Dot Matrix Printer?
To print characters by striking them on the ribbon
What is the advantage of Bar Code Reader?
It can read data in the form of light and dark lines
What is the characteristic of Cathode-Ray Tube (CRT)?
Large in size, high power consumption
What is the use of Character Printer?
To print one character at a time
Study Notes
Computer Organization
- Computer organization involves understanding hardware and software components.
Input Devices
- Keyboard: an input device that helps input data to the computer, available in various sizes (84, 101/102, 104, 108 keys).
- Types of keys on a keyboard:
- Typing keys (A-Z, 0-9)
- Numeric keypad (17 keys, used for numeric data and cursor movement)
- Function keys (12 keys, each with a unique meaning and purpose)
- Control keys (cursor and screen control, including arrow keys, Home, End, Insert, Delete, etc.)
- Special purpose keys (Enter, Shift, Caps Lock, Num Lock, Space bar, Tab, Print Screen)
- Other input devices:
- Mouse: a popular pointing device
- Joystick: a pointing device used in Computer Aided Designing (CAD) and gaming
- Light pen: a pointing device used to select menu items or draw on the monitor screen
- Scanner: an input device that works like a photocopy machine
- Microphone: an input device that converts sound into digital form
- Magnetic Ink Card Reader (MICR): an input device used in banks to process large numbers of cheques
- Optical Character Reader (OCR): an input device that reads printed text and converts it into machine-readable code
- Bar Code Readers: a device used to read bar-coded data
Output Devices
- Monitors:
- Cathode-Ray Tube (CRT) display: made up of small pixels, with smaller pixels resulting in better image clarity
- Disadvantages of CRT: large in size, high power consumption
- Flat-Panel Display Monitor: a class of video devices with reduced volume, weight, and power requirement
- Printers:
- Types of printers: Impact Printers, Non-Impact Printers
- Impact Printers:
- Print characters by striking them on the ribbon, which is then pressed on the paper
- Characteristics: low consumable costs, noisy, useful for bulk printing, physical contact with paper to produce an image
- Types: Character printers, Line printers
- Character Printers:
- Print one character at a time
- Types: Dot Matrix Printer (DMP), Daisy Wheel
- Dot Matrix Printer: popular due to ease of printing and economical price, each character printed in a dot matrix format
Introduction to input devices used in computers, including keyboard types and keys. Learn about the different types of keyboards and their features.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
