Practice Mode•Instant Explanations & 50:50 Enabled
Input And Output Devices MCQs
High-yield multiple choice questions asked in previous years (UPSC, SSC CGL, JKSSB, RRB & State PSCs).
High-Yield Concept Capsule & Key Facts
📌 Standard scoring module in IBPS RRB PO/Clerk, SSC CGL Tier 2, JKSSB Junior Assistant, and Railway exams.
Input Peripherals & Optical Recognition Technologies
- • Pointing Devices: Mouse (mechanical, optical, laser), Trackball, Touchpad, Light Pen, Graphics Digitizing Tablet.
- • Optical Data Readers: OMR (Optical Mark Recognition - uses reflected light to detect pencil/pen bubble marks), OCR (Optical Character Recognition - converts scanned printed text into editable digital machine text), Barcode Readers, and QR Code Scanners.
- • Banking Specialist Device: MICR (Magnetic Ink Character Recognition) reads characters printed with magnetic iron-oxide ink (E-13B font) on the bottom band of bank cheques for automated clearing.
- • Audio & Biometric Input: Microphones (analog sound transformed via ADC sound card), Fingerprint scanners, Retina/Iris scanners, and Facial recognition cameras.
Output Classification: Soft Copy vs Hard Copy Displays
- • Soft Copy Output: VDU / Monitors (CRT, LCD with CCFL backlight, LED with diode array backlight, OLED with self-emissive organic pixels). Refresh rate (Hz) and Resolution (pixels, aspect ratio).
- • Impact Printers: Physical mechanical hammering strikes ribbon against paper (e.g., Dot Matrix Printer - DMP measured in CPS/LPM, Daisy Wheel Printer, Line Printer). Noisy, supports carbon copy multipart forms.
- • Non-Impact Printers: Inkjet (sprays droplets of liquid ink via thermal or piezoelectric nozzles) and Laser Printers (uses electrostatic charge, laser beam, and dry toner powder fused by heated rollers). Quiet, high resolution (measured in DPI - Dots Per Inch) and speed measured in PPM (Pages Per Minute).
- • Plotters: Vector graphics output devices utilizing robotic drawing pens for architectural blueprints, CAD designs, and large engineering drawings.
| Device | Type | Core Technology | Primary Application / Metrics |
|---|---|---|---|
| MICR | Input | Magnetized Iron-Oxide Ink | Bank cheque clearing (9-digit MICR code) |
| OMR | Input | Reflected Light Sensing | Objective competitive exam answer sheets |
| OCR | Input | Pattern/Feature Extraction | Digitizing printed documents into editable text |
| Dot Matrix | Output (Impact) | Pins striking ink ribbon | Carbon copies, billing receipts (CPS/LPM) |
| Laser Printer | Output (Non-Impact) | Photoreceptor drum & Toner | High-speed document printing (PPM, DPI) |
| Plotter | Output | Vector pen drawing | CAD, architectural engineering blueprints |
Showing 15 Practice Questions
Q1High-Yield Practice SetMedium
Which of the following technologies is specifically used for reading and processing bank cheques in the clearing system?
Q2High-Yield Practice SetMedium
Which output device is best suited for producing large-scale architectural blueprints, engineering schematics, and vector drawings?
Q3High-Yield Practice SetMedium
What metric is universally used to measure the printing resolution and output clarity of a modern printer?
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Q4High-Yield Practice SetMedium
Which of the following is classified as an impact printer?
Q5High-Yield Practice SetMedium
The technology that evaluates and scores pencil or pen marks on pre-printed objective examination answer sheets is:
Q6High-Yield Practice SetMedium
Which of the following peripherals functions simultaneously as both an input and an output device?
Q7High-Yield Practice SetMedium
What is the key component used in laser printers to attract dry toner powder and transfer it onto paper?
Q8High-Yield Practice SetMedium
Which device converts printed paper text into machine-encoded digital text that can be edited in a word processor?
Q9High-Yield Practice SetMedium
The speed of dot matrix printers is typically measured in which of the following units?
Q10High-Yield Practice SetMedium
Which display technology utilizes organic carbon-based molecules that emit light independently without requiring a separate backlight?
Q11High-Yield Practice SetMedium
Which input device uses a light-sensitive wand in conjunction with a computer's cathode ray tube (CRT) display screen to highlight or draw items?
Q12High-Yield Practice SetMedium
Which of the following is an example of soft-copy output?
Q13High-Yield Practice SetMedium
What type of printer is commonly used in ATM receipt printers, POS credit card terminals, and bus ticket machines due to its compact size and lack of ink ribbons?
Q14High-Yield Practice SetMedium
The standard QWERTY keyboard layout was originally engineered to:
Q15High-Yield Practice SetMedium
Which port standard is most commonly used today to connect modern plug-and-play input and output devices to a desktop or laptop?
Frequently Asked Questions (Input And Output Devices)
Q: What is the primary operational difference between impact and non-impact printers?
Impact printers (like Dot Matrix and Daisy Wheel) print characters by mechanically striking pins or hammers against an inked ribbon onto paper, making them noisy but capable of creating duplicate carbon copies. Non-impact printers (Laser and Inkjet) form images without mechanical impact using electrostatic toner or sprayed ink droplets, producing faster, quieter, and higher-resolution output.
Q: How does MICR work and where is it exclusively used?
MICR (Magnetic Ink Character Recognition) reads characters printed in specialized magnetic ink containing iron oxide. It is exclusively deployed in the banking sector to process bank cheques quickly and fraud-resistantly, reading the 9-digit MICR code (representing city, bank, and branch).
Q: Can a touch screen be classified as both an input and output device?
Yes. A touch screen is a dual-function hybrid peripheral. The display screen itself serves as an output device (visual feedback), while the transparent touch-sensitive sensor grid overlying the display accepts physical touch gestures as input commands.
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