Quick Revision

GK One-Line Question & Answer

15541+ short questions with short answers, covering every category and sub-category on the site — no long articles to scroll through. Good for a fast recap before an exam, or a few minutes of daily practice.

Looking for exam process/strategy questions instead? Try the Exam Preparation FAQ →

Computer Fundamentals → Introduction to Computer 25

4K UHD resolution has how many pixels?
8294400
click to copy
8K resolution is?
7680 × 4320
click to copy
HDR (High Dynamic Range) in displays improves?
Contrast and color range
click to copy
Color gamut sRGB vs DCI-P3: DCI-P3 is?
Wider color space used in cinema/professional displays
click to copy
Electronic paper (E-ink) displays are suitable for?
Reading static text with low power consumption
click to copy
In laser printing, the laser beam is used to?
Discharge selected areas on the drum
click to copy
Fuser unit in laser printer?
Permanently bonds toner to paper using heat and pressure
click to copy
Which ink type in inkjet printers is water-resistant?
Pigment-based
click to copy
FDM 3D printing stands for?
Fused Deposition Modeling
click to copy
SLA 3D printing uses?
UV laser to cure liquid photopolymer resin
click to copy
Surround sound 5.1 system has?
5 speakers + 1 subwoofer
click to copy
Projector lumen rating measures?
Brightness of projected image
click to copy
DLP projector technology uses?
Millions of tiny mirrors (Digital Micromirror Device)
click to copy
Laser projector uses?
Laser diodes as light source
click to copy
What does CMYK stand for in printing?
Cyan Magenta Yellow Black
click to copy
RGB is used for?
Screen/display color (additive)
click to copy
Screen printing uses?
Mesh/stencil to push ink through onto substrate
click to copy
Which display port can carry both video AND power?
USB-C (DisplayPort Alt Mode)
click to copy
Holographic display creates?
3D images visible without special glasses
click to copy
Electronic whiteboard (smartboard) combines?
Interactive display and input device
click to copy
Head-mounted display (HMD) is used for?
VR/AR immersive experiences
click to copy
Binaural audio is designed to?
Create 3D spatial sound through headphones
click to copy
Noise-cancelling headphones use?
Microphones + anti-phase signals to cancel ambient noise
click to copy
Which output is produced by a text-to-speech (TTS) system?
Synthesized audio speech from text
click to copy
Screen reader software provides output via?
Audio speech and/or Braille display
click to copy

Computer Fundamentals → Output Devices 15

Curved monitor benefits include?
Reduced eye strain and more immersive viewing
click to copy
Laser printer drum is charged using?
Corona wire/primary charge roller
click to copy
Inkjet printer resolution is typically measured in?
DPI (dots per inch)
click to copy
3D printer creates objects by?
Adding material layer by layer (additive manufacturing)
click to copy
Which audio output device converts digital to analog for headphones?
DAC (Digital-to-Analog Converter)
click to copy
LCD projector transmits light through?
Liquid crystal panels modulating light
click to copy
Which type of printer uses electrostatic charge to attract toner?
Laser
click to copy
Braille printer (embosser) creates?
Raised dots on paper for visually impaired users
click to copy
Wide-format printer is also called?
Large-format or plotter printer
click to copy
Thermal transfer printer uses?
Heat to melt ink from ribbon onto paper/label
click to copy
Direct thermal printer vs thermal transfer: direct thermal?
Prints by heat-activating chemically treated paper
click to copy
UV printer cures ink using?
Ultraviolet light instantly
click to copy
Sublimation printer is used for?
Printing on fabric/mugs using heat-transfer dye
click to copy
Plotter pen speed is measured in?
IPS (inches per second)
click to copy
Which output device shows data on a non-volatile display?
E-ink (maintains display without power)
click to copy