Input and Out-Put Devices :
For any computer system, input and output are very important. Without them, a computer cannot perform any task.
Users give data and instructions to the computer through input devices. After the data is processed, the result provided by the computer is received through output devices. In this way, it works in the form of input and output.
Every computer system in the world works only when it receives input and produces output.
No Input = No Output = No Work 🚫
Input Device –
It is a device through which data and instructions are entered into a computer.
Input can be in the form of text or typing, sound or voice, images, and software programs.
Some major input devices are as follows:
Keyboard
Mouse
Trackball
Trackpad
Graphics Tablet
Light Pen
Scanner
Joystick
Microphone
Touch Screen
Smart Card Reader
Barcode Reader
Smart Card + NFC Reader
OCR (Optical Character Recognition)
MICR (Magnetic Ink Character Recognition)
Digital Pen
Voice Recognition Device
Face Recognition System
OMR (Optical Mark Recognition)
VR Controllers (Virtual Reality)
Biometric SensorWebcam
Eye Tracker (eye movement control)
Fingerprint Scanner1
Output Device :
Output devices are devices that display the data or results after processing.
Through these devices, information from the computer is presented or received.
An output device is a device that takes the processed data from inside the computer and presents it to the user by displaying, playing, or showing it.
Some major output devices are as follows:
- Monitor
- Printer
- Speaker
- Headphones
- Screen Image Projector
- Plotter
- GPS Display Device
- Digital Projector
- LED / LCD Display
- E-paper Display (used in e-book readers)
- Digital Signage Display (advertising screens)
- Plotter Printer (for large design printing)
- Thermal Printer (used in billing machines)
- Dot Matrix Printer
- Laser Printer
- Inkjet Printer
- Head Mounted Display (HMD)
- Tactile Output Device (touch-based feedback)
- Voice Output Device (Text-to-Speech systems)
- Sound Bar
- Smart TV (as a display device)
- VR Headset (Virtual Reality output)
- AR Glasses (Augmented Reality Glasses – enhancing the real world with digital elements)
- 3D Printer
- Braille Display (for visually impaired users)
- Haptic Feedback Device (vibration output)
Devices that act as both input and output devices :
A device that can both send and receive data is called an input-output device.
Some devices can perform both input and output functions; they are as follows:
Smartphone
Touch Screen (provides input and displays output)
ATM Machine
Modem (sends and receives data)
Network Card (NIC)
Smartwatch
Game Console
POS Machine (billing and card input)
Biometric Device (fingerprint input and result display)
Multifunction Printer (print and scan)
Fax Machine
Bluetooth Device
USB Drive (data read/write)
External Hard Drive
Sound Card
Headset (Headphones + Microphone)
Tablet
Interactive Whiteboard
VR Headset
AR Glasses
Objective Questions
(1) Which input device is commonly used for gaming and simulation?
(a) Mouse (b) Scanner
(c) Joystick (d) Microphone
(e) None of these
(2) Which of the following is NOT an input device?
(a) Monitor (b) Keyboard
(c) Scanner (d) Mouse
(e) a and b
(3) Which of the following devices is used to enter graphical data into a computer as input?
(a) Monitor (b) Keyboard
(c) Scanner (d) Mouse
(e) Printer
(4) Which input device is used specifically for scanning barcodes printed on clothes?
(a) Barcode Reader (b) Joystick
(c) Track Ball (d) Keyboard
(e) Printer
(5) Which input device is used for speech recognition?
(a) Mouse (b) Microphone
(c) Scanner (d) Keyboard
(e) Printer
(6) Which device is used to input biometric data?
(a) Monitor (b) Keyboard
(c) Scanner (d) Mouse
(e) Fingerprint Scanner
(7) A Touch Screen is which type of input and output device?
(a) Only output (b) Only input
(c) Only a (d) Both input and output
(e) None of these
(8) Which input device is used for video calls?
(a) Webcam (b) Keyboard
(c) Mouse (d) Joystick
(e) All of the above
(9) Which input device moves the cursor on the computer screen?
(a) Keyboard (b) Mouse
(c) Printer (d) Speaker
(e) a & b
(10) Which device converts a document into digital form?
(a) Printer (b) Scanner
(c) Speaker (d) Monitor
(e) None of these
Answer: (b) Scanner
(11) Which of the following is an output device?
(a) Scanner (b) Keyboard
(c) Monitor (d) Mouse
(e) All of the above
(12) Through which device is sound heard?
(a) Microphone (b) Speaker
(c) Scanner (d) Keyboard
(e) a and b both
(13) Which of the following is NOT an input device?
(a) Keyboard (b) Mouse
(c) Monitor (c) Scanner
(d) None of these
(14) Which input device takes voice input?
(a) Speaker (b) Microphone
(c) Monitor (d) Printer
(e) Keyboard
(15) Which device converts data into hard copy?
(a) Monitor (b) Printer
(c) Mouse (d) Keyboard
(e) Laptop
(16) Which input device is used to control games?
(a) Joystick (b) Printer
(c) Monitor (d) Speaker
(e) None of these
(17) Which device is used for scanning barcodes?
(a) Keyboard (b) Barcode Reader
(c) Mouse (d) Monitor
(e) a & b
(18) Microphone is which type of device?
(a) Output (b) Input
(c) Storage (d) None
(e) a and b both
(19) Touch Screen is used for what purpose?
(a) Only input (b) Only output
(c) Both (d) None
(e) None of these
(20) Which device displays data on the computer?
(a) Printer (b) Monitor
(c) Scanner (d) Mouse
(e) Mobile
ANSWERS (1)- c (2)- a (3)-c (4)-a
(5)- b (6)- e (7)- d (8)- a (9)-b
(10)-b (11)-c (12)-b (13)-c (14)-b
(15)-b (16)-a (17)-b (18)-b (19)-c (20)-b