Computer Input and Output Devices

 In Technology

Input and Output devices are a important part of the computer. All are type of hardware device that makes up the computer system. Both allow the network to work properly with external help. Both input and output devices deal with data but in different ways.

An input allows the user to send data while the output completes the task related to the data. These all are auxiliary devices that link to the device and complete all the duties accordingly. Input and output devices with examples like keyboards, mouse, scanners, etc. are some of the input devices examples while printers, monitors, headphones, etc. are some of the output devices examples.

Different Parts of The Computer

Input devices: An equipment or small hardware which helps us enter information into a computer is called an input device.

Output devices: Computer an output devices is any hardware which used to forward data from computer to another device or end user.

We can also called as it is change information from machine language to a human-understandable language.

The computer also quickly processes various types of data. To work with this data, we need multiple types of devices.

These devices are called Input-Output devices. The most frequently used input and output devices of the computer are like keyboard, mouse, printer, joystick, speaker, etc.

In this article here we discuss about devices to get a basic knowledge of both input and output devices.

Input Devices of Computer

As discuss above the input devices allow the users to send signals to the computer to perform a certain task.

The recipient at this end is the Central Processing Unit (CPU) which then sends the indicator to the output devices.

Input devices further categorize according to modality like visual or audio and is it direct or indirect.

Here list of input devices-

1. Keyboard Devices

  • Keyer
  • Keyboard
  • Lighted Program Function Keyboard (LPFK)

2. Pointing Devices

  • A mouse sitting on a desk.
  • A computer mouse
  • 3D mice
  • Joysticks
  • Pointing sticks

3. Composite Devices

  • Wii Remote
  • Wii Remote with attached strap

4. Game controller

  • Gamepad (or joypad)
  • Paddle (game controller)
  • Jog dial/shuttle (or knob)
  • Wii Remote

5. Visual Devices

  • Digital camera
  • Digital camcorder
  • Portable media player
  • Webcam
  • Microsoft Kinect Sensor
  • Image scanner
  • Fingerprint scanner
  • Barcode reader
  • 3D scanner
  • Laser rangefinder
  • Eye gaze tracker
  • Medical Imaging
  • Computed tomography
  • Magnetic resonance imaging
  • Positron emission tomography
  • Medical ultrasonography

6. Audio Input Devices

  • Microphones
  • MIDI keyboard or another digital musical instrument

Here list of input devices are


A keyboard allows a user to enter letters, numbers, and other symbols into a computer.

These are called characters on a keyboard, generally, the keyboard has 104 different keys.

The keyboard is used to direct the computer through instructions.


A mouse is an important devices of the computer. Also, known as the pointing device.

Mouse mainly works on the point and click principle, there are three types of mouse-like a wired mouse, wireless mouse, and bluetooth mouse.

Light Pens

Light pens allow a user to draw directly on the computer screen or display objects similarly to the touchscreen but with high position accuracy.


A scanner make used of scan documents such as pictures and any pages of text/image. A Scanner creates the electronic version of the scanned documents that can easily be viewed and edits on the computer.


A microphones use to input sound, which will be then stored in digital form on the computer.

Input devices Sample Questions

Q1. ______ pen is an input device that is operate a computer screen.

A. Ink B. Magnetic C. Light D. None of the Above

Answer (C) Light

Q2. Select one among following is not an input device?

A. Scanner B. Touchpad C. Barcode Reader D. Speaker

Answer (D) Speaker

Q3. Which of the following is an example of the pointing device?

A. Mouse B. Printer C. Scanner D. Barcode Reader

Answer (A) Mouse

Q4. Which of the following stored information in digital form?

A. Mouse B. Keyboard C. Scanner D. Microphone

Answer (D) Microphone

Q5. How many keys are there on the keyboard?

A. 105 B. 104 C. 99 D. 100

Answer (B) 104.

output devices

An output devices manage of showing the end-result after data operate by the input device.

Outcome possibly an image, graphic, textual or audio form. Output devices appear the visual elements on the display.

Here list of output devices are


A Monitor is an essential part of the computer which is used to display the processed information.

Monitor display information in the pictorial form, there are five types of monitor, LCD, LED, OLED, Plasma, CRT Monitor.


A printer is make use of to print paper documents which include images, text.

There are two types of printer inkjet printer and laser printer.

A laser printer is the first choice for businesses, where an inkjet printer is the common choice of the consumer.


Headphones are used to listen to the sound from the computer. Headphones come with two small speakers as one speaker for each ear.

Headphones are used to listen to the sound from the computer. Headphones come with two small speakers as one speaker for each ear.

Output devices Sample Questions

Q1. Which of the following is a device that lets the computer communicate with you?

A. Input B. Output C. Print D. Type

Answer (B) Output

Q2. Choose of the following is not an output device?

A. Scanner B. Printer C. Monitor D. All of the above

Answer (A) Scanner

Q3. Using Output Devices, we can _____?

A. Input data B. Scan data C. Store data D. View/Print data

Answer (D) View/Print data

Q4. Is speaker the type of _____?

A. Input B. Output C. Both Input and Output D. None of the above

Answer (B) Output

Q5. Which type of printer first choice for the businesses?

A. Laser B. Inkjet C. Both Laser and Inkjet D. None of the above

Answer (A)

Input and output devices of computer PDF:- Download PDF Here

Difference between Input and Output Devices

Accepts user data Reflects user data
The user commands them Processor commands them
Conversion of friendly instruction into a machine friendly Conversion of machine’s instructions to user needs
Sends information to the processor for execution Sends processed information back to the user
Helps computer in receiving data Helps computer in displaying data
Example – Keyboard, Image Scanner, etc. Example- Monitor, Printers, etc.
Helps computer in receiving data Helps computer in displaying data

Wrapping Up

Both devices make the world of computer systems. Without them, all the invention and technology that we appreciate is not possible.

This is why they become major part of general knowledge.

There are lots of competitive exams like UPSC, RRB, IBPS, SBI PO, Clerk Exams, etc. will have questions from this era. Section comes under the basic computer knowledge.

Recent Posts
Showing 5 comments
  • Sam

    Very nice article for learning

  • Aditi Jain

    A great refresher on Computer knowledge. Thanks for sharing

  • Tech Geek

    Very much informative for school-going students. It clears the concepts. Thanks.

pingbacks / trackbacks

Leave a Comment

Start typing and press Enter to search