Input and Output Devices Question and Answers | Basic Computer Knowledge


The CRT is ________ in shape.

   A.) circular
   B.) rectangular
   C.) eclipse
   D.) conical

Answer: Option 'B'


  • Important - Bits

      * Mouse was invented by Dauglas Engelbert at Stanford Research Centre in 1963.
      * Optical mouse was introduces by Microsoft in 1999. It uses a light beam to detect the movement.
      * A joystick allows movements in all directions (360)
      * Scanner stores images in both gray scale and colour mode.
      * Drag and drop refers to the action of clicking and holding down the mouse button while moving the mouse and realing it.
      * OCR technology is being developed for greater accurate recognition and is known as Intelligent Character Recognition (ICR).


What type of device is a digital camera?

   A.) Input
   B.) Output
   C.) Software
   D.) Storage

Answer: Option 'A'


  • MIDI Devices

    * MIDI (Musical Instrument Digital Interface) is a system design to transmit information between electronic musical instruments.


    * The trackball is sort of like an upside-down mouse, with the ball located on top.
    * You use your fingers to roll the trackball, and internal rollers (similar to what


The OCR recognises the _______ of the characters with the help of light source.

   A.) size
   B.) shape
   C.) colour
   D.) used ink

Answer: Option 'B'



An example of peripheral equipment is

   A.) CPU
   B.) printer
   C.) ALU
   D.) spreadsheet

Answer: Option 'B'



A joystick is primarily used to/for

   A.) control sound on the screen
   B.) computer gaming
   C.) enter text
   D.) draw pictures

Answer: Option 'B'

computer gaming


A parallel port is most often used by a

   A.) printer
   B.) monitor
   C.) mouse
   D.) external storage device

Answer: Option 'A'



The OCR is used for the preparation of

   A.) electricity bills
   B.) insurance premium
   C.) telephone bills
   D.) All of the above

Answer: Option 'D'

All of the above


External devices such as printers, keyboards and modems are known as

   A.) add on devices
   B.) PC expansion slot add-ons
   C.) peripherals
   D.) special buys

Answer: Option 'C'



Which of the following is not a hardware?

   A.) Processor chip
   B.) Printer
   C.) Mouse
   D.) Java

Answer: Option 'D'



The transfer of data from a CPU to peripheral devices of computer is achieved through

   A.) interfaces
   B.) buffer memory
   C.) modems
   D.) I/O ports

Answer: Option 'D'

I/O ports


Which key is used in combination with another key to perform a specific task?

   A.) Function
   B.) Space bar
   C.) Control
   D.) Arrow

Answer: Option 'C'



The ________ may also be called the screen or monitor.

   A.) printer
   B.) scanner
   C.) hard disk
   D.) display

Answer: Option 'D'



What type devices are computer speakers or headphones?

   A.) Input
   B.) Input/Output
   C.) Software
   D.) Output

Answer: Option 'D'



You can use the tab key to

   A.) move a cursor acrose the screen
   B.) indent a paragraph
   C.) move the cursor down the screen
   D.) Both '1' and '2'

Answer: Option 'B'

indent a paragraph


A hard copy would prepared on a

   A.) line printer
   B.) dot matrix printer
   C.) plotter
   D.) All of these

Answer: Option 'D'

All of these


________ printer cannot print more than one character at a time.

   A.) Line
   B.) Daisy - wheel
   C.) Laser
   D.) Dot matrix

Answer: Option 'D'

Dot matrix

  • Memory is of three types

    * Cache Memory
    * Primary Memory
    * Secondary Memory

    Cache Memory

    * Cache memory is a very high-speed semiconductor memory which can speed up CPU. It acts as a buffer between the CPU and main memory.

    Primary Memory (Main Memory)

    1. Primary memory holds only those data and instructions on which computer is currently working.
    2. It has limited capacity and data is lost when power is switched off.
    3. It is generally made up of the semiconductor device.
    4. The data and instruction require being processed reside in main memory.
    There are two sub-categories ROM and RAM in Primary memory.


Speed of the printer is limited by the speed of

   A.) paper movements
   B.) cartridge used
   C.) length of paper
   D.) All of these

Answer: Option 'B'

cartridge used


USB refers to

   A.) a storage device
   B.) a proccessor
   C.) a port type
   D.) a serial bus standard

Answer: Option 'C'

a port type

  • Important - Bits

    * Enter key is an alternative to press OK button.
    * Shift key is used in combination with other keys. So this is also called

    Combination key.

    * Caps lock and num lock keys are called as 'toggle keys' because when pressed, they toggle or change their status from one state to another.
    * Numeric keypad is used only, when the num lock key is in active state.


Which of the following produces high-quality output?

   A.) Impact printer
   B.) Non-impact printer
   C.) Plotter
   D.) Both '1' and '2'

Answer: Option 'B'

Non-impact printer


First computer mouse was built by

   A.) Douglas Engelbart
   B.) Robert Zewacki
   C.) William English
   D.) Oaniel Coogher

Answer: Option 'C'

William English

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