Peripheral Devices
Delhi Police Exam
1. What Are Peripheral Devices?
Peripheral devices are external hardware components that are connected to the computer to either input data, output results, or store information.
External Hardware Components
Enhance Computer Functionality
Not Part of Core System
Connected Externally
Simply put: Peripherals = Devices that work with the computer from outside.
2. Types of Peripheral Devices
Input Devices
Used to enter data or commands into the computer.
Examples:
Keyboard
Mouse
Scanner
Microphone
Joystick
Webcam
Delhi Police PYQ 2020:
Which of the following is an input device?
Options: (a) Monitor (b) Printer (c) Keyboard (d) Speaker
Answer: (c) Keyboard
Output Devices
Used to display, print, or transmit information after processing.
Examples:
Monitor
Printer
Speaker
Projector
Plotter
Delhi Police PYQ 2021:
Which of these is an output device?
Options: (a) Mouse (b) Keyboard (c) Speaker (d) Scanner
Answer: (c) Speaker
Storage Devices
Used to store data permanently or temporarily.
Examples:
Hard Disk
Pen Drive
CD/DVD
Memory Card
SSD
Delhi Police PYQ 2022:
Pen drive is a type of:
Options: (a) Input device (b) Output device (c) Storage device (d) None
Answer: (c) Storage device
3. Internal vs External Peripherals
| Type | Examples | Connection Type |
|---|---|---|
| Internal Peripherals | Hard Disk, CD Drive, RAM | Inside CPU cabinet |
| External Peripherals | Keyboard, Mouse, Printer, Pen Drive | Connected via USB or cable |
4. Importance of Peripheral Devices
Expand computer functionality
Improve user interaction
Store and share data easily
Enable multimedia (audio/video input-output)
Allow printing, scanning, and digital communication
5. Delhi Police PYQs Related to Peripherals
Delhi Police Constable 2017
Which device is both input and output?
Options: (a) Modem (b) Printer (c) Keyboard (d) Scanner
View Answer
Answer: (a) Modem
Delhi Police Constable 2020
A printer is connected to which part of the computer?
Options: (a) CPU (b) Monitor (c) Motherboard port (d) Mouse
View Answer
Answer: (c) Motherboard port
Delhi Police Constable 2023
Which peripheral device is used to convert hard copy to soft copy?
Options: (a) Printer (b) Plotter (c) Scanner (d) Projector
View Answer
Answer: (c) Scanner
6. Quick Recap
| Type | Function | Examples |
|---|---|---|
| Input | Feed data | Keyboard, Mouse, Scanner |
| Output | Display results | Monitor, Printer, Speaker |
| Storage | Save data | Hard Disk, Pen Drive, SSD |
7. Memory Tip for Exam
"I-O-S" Formula
I – Input, O – Output, S – Storage
Every peripheral belongs to one of these three categories
You've completed Peripheral Devices Concepts!
Courage Tip: Remember the "I-O-S" formula - Input, Output, Storage. Practice identifying device categories and their functions for Delhi Police exam success.
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