Types of Computer & Input/Output Devices MCQs with Answers
Solved Types of Computer & Input/Output Devices MCQs with answers — Analog, Digital, Hybrid, MICR, OCR, RAM/ROM. Free quiz + PDF for PPSC, FPSC, NTS, CSS & PMS.
Types of Computers & Input/Output Devices — Master Reference for Pakistani Competitive Exams
The chapter Types of Computers & Input/Output Devices is one of the highest-yield Computer Science topics in Pakistan’s PPSC, FPSC, NTS, CSS, PMS, OTS, CTS, BPSC, KPPSC and SPSC One Paper exams. Almost every Junior Clerk, Assistant, Sub-Inspector, Lecturer and BPS-14 to BPS-17 paper carries 2–4 MCQs from this single chapter. This page consolidates 55+ solved MCQs with answers covering computer classification by operation (Analog/Digital/Hybrid) and by size/power (PC, Workstation, Mini, Mainframe, Supercomputer), plus all the classic input devices (keyboard QWERTY, mouse, joystick, light pen, track ball, scanner, MICR, OCR, OMR, bar code reader, microphone, touch screen, web camera) and output devices (monitor/VDU, flat-panel display, laser printer, impact printer, character printer, dot matrix, inkjet, 3D printer, speaker, CD/DVD).
Types of Computers by Operation
| Type | Input | Output | Based on | Example |
|---|---|---|---|---|
| Digital | on/off, 0/1 | on/off, 0/1 | Counting | General-purpose PCs |
| Analog | Measure elements | Graph / picture | Continuous measurement | Weather forecasting, speedometer, ECG |
| Hybrid | 0/1 + measure element | on/off + graph | Counting + measurement | Petrol pumps, modems, simulators, jet planes |
Types of Computers by Size and Power
| Type | Users | Description |
|---|---|---|
| Personal Computer (PC) | Single user | Has a moderately powerful microprocessor. |
| Workstation | Single user | Has a more powerful microprocessor than a PC. |
| Mini Computer | Multi-user | Supports hundreds of users simultaneously. |
| Mainframe | Multi-user | Supports hundreds of users simultaneously. Mainly used in banks. |
| Supercomputer | Specialised | Extremely fast — hundreds of millions of instructions/sec. Used for global weather forecasting, engineering design, space exploration. Example: NASA. |
Key Input & Output Device Facts
- Keyboard — Most common input device. Standard key arrangement is called QWERTY.
- Mouse — The most popular pointing device.
- Joystick — Transmits X-Y hand coordinates to position a cursor on the screen.
- Light Pen — A light-sensitive pointing device used to select or modify text/data on a screen.
- Track Ball — Mostly used in notebook/laptop computers instead of a mouse.
- Scanner — Works like a photocopy machine.
- Digitizer — Changes information into digital form.
- MICR — Magnetic Ink Card Reader. Mostly used in banks for cheque processing.
- OCR — Optical Character Reader; reads printed text.
- OMR — Optical Mark Reader; recognises pen/pencil marks (used in MCQ answer sheets).
- Bar Code Reader — Reads bar-coded data.
- Monitor / VDU — Visual Display Unit; the main output device.
- Flat-Panel Display — Smaller volume, weight and power than CRT.
- Laser Printer — Uses a laser beam to produce an image on a drum.
- Impact Printer — Strikes a metal/plastic head against an ink ribbon.
- Dot Matrix Printer — Prints characters as a combination of dots.
- Inkjet Printer — Non-impact; sprays ink from a nozzle onto paper.
- 3D Printer — Most recent printing development; creates 3D objects from a CAD model.
Full Device Classification
| Input Devices | Output Devices | Storage Devices | Processing Devices |
|---|---|---|---|
| Keyboard, Mouse, Microphone, Touch Screen, Light Pen, Web Camera, Joystick, Scanner, MICR, OCR, OMR, Bar Code Reader | Monitor, Printer, Speaker, CD, DVD, Flat-Panel Display, Plotter | Flash Memory, Optical Disk, Local Drives, Magnetic Tape, Magnetic Disk, CD/DVD | Mother Board, Processor (CPU), RAM, ROM, Switched Mode Power Supply (SMPS) |
Exam tip: Lock six anchors to cover ~80% of all MCQs from this chapter — 3 types by operation (Analog/Digital/Hybrid), 5 types by size (PC → Supercomputer), QWERTY keyboard, MICR = banks, VDU = Monitor, and Mainframe = banks.
Frequently Asked Questions
There are three basic types of computers based on operation — Analog (continuous measurement), Digital (counting, 0/1) and Hybrid (combination of both).
The standard key arrangement on a keyboard is called QWERTY, named after the first six letters of the top row.
VDU stands for Visual Display Unit — the formal name for the computer monitor, which is the main output device.
MICR (Magnetic Ink Card Reader) is generally used in banks because of the large number of cheques that need to be processed every day.
Mainframe computers are mainly used in banks. They are multi-user systems that can support hundreds of users simultaneously.
OCR (Optical Character Reader) reads printed text and converts it into editable digital text. OMR (Optical Mark Reader) is a special optical scanner that recognises marks made by pen or pencil — most commonly used in MCQ answer sheets.
Yes — essential. Types of computers and input/output devices are tested in every One Paper, NTS NAT, GAT, OTS, CTS, BPSC, KPPSC, SPSC, PPSC and FPSC exam. Expect 2–4 MCQs from this chapter in any 100-mark paper.
Yes. Click the Download PDF button in the hero or quiz section to get all 55+ Types of Computers & Input/Output Devices MCQs with correct answers as a branded QuizWing PDF for offline revision.