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 → Input Devices 11

Iris scanner identifies users based on?
Unique pattern of the iris
click to copy
Retinal scanner scans?
Unique blood vessel pattern on retina
click to copy
Which input device is used in medical imaging to input patient data?
Touch panel with specialized medical keyboard
click to copy
Which input device is used to input coordinates in GIS?
Digitizing tablet/stylus over maps
click to copy
CCD in a scanner stands for?
Charge-Coupled Device
click to copy
Scroll wheel on a mouse generates which type of input?
Relative rotation/scroll amount
click to copy
Which keyboard technology uses light beams to detect keystrokes?
Optical keyboard
click to copy
Braille input device is used by?
Visually impaired users
click to copy
Steering wheel input device is used in?
Automotive driving simulators and games
click to copy
Dance pad/floor mat is which type of input device?
Body motion input device
click to copy
Which input device reads utility meters remotely?
AMR (Automatic Meter Reading) device
click to copy

Computer Fundamentals → Introduction to Computer 28

Voice recognition input works by?
Analyzing frequency patterns to recognize words
click to copy
Gesture recognition input uses?
Camera/sensors to interpret body movements
click to copy
Brain-Computer Interface (BCI) receives input from?
Neural signals from the brain
click to copy
EEG-based BCI measures?
Electrical activity of the brain
click to copy
MIDI is used for?
Musical instrument digital input interface
click to copy
Which type of barcode stores more data in smaller space?
QR code (2D)
click to copy
DataMatrix barcode is used for?
Industrial parts, pharmaceuticals (small items)
click to copy
Pen input on tablet computers uses which technology primarily?
Both EMR and capacitive
click to copy
Which sense does haptic feedback primarily stimulate?
Touch
click to copy
CMOS sensor in cameras compared to CCD?
Uses less power and is cheaper to manufacture
click to copy
Which input mode does a graphics tablet use when stylus is near but not touching?
Hover mode
click to copy
Multi-touch gesture 'pinch to zoom' requires minimum how many fingers?
2
click to copy
Eye-tracking input system works by?
Tracking pupil/iris movement using infrared cameras
click to copy
Which technology allows input by detecting skin conductance?
Galvanic skin response sensors
click to copy
Magnetic card reader reads data from?
Magnetic stripe using magnetic sensor
click to copy
Smart card uses which technology for data storage?
Embedded microchip
click to copy
EMV chip in credit cards stands for?
Europay Mastercard Visa
click to copy
Which peripheral converts handwriting to digital text in real time?
Digital pen with recognition software
click to copy
Biometric passport uses which input technology?
RFID chip with biometric data
click to copy
Which input sensor measures atmospheric pressure?
Barometer/barometric sensor
click to copy
Gyroscope sensor in smartphones detects?
Rotational orientation
click to copy
Accelerometer in smartphones detects?
Linear acceleration/motion
click to copy
Magnetometer in smartphones is used as?
Digital compass
click to copy
Ambient light sensor adjusts?
Screen brightness automatically
click to copy
Proximity sensor in smartphones detects?
Whether device is near face (turns off screen during calls)
click to copy
Mini-LED display technology uses?
Thousands of small LEDs for local dimming
click to copy
Which display has the fastest response time?
TN LCD
click to copy
G-Sync and FreeSync technologies are used for?
Synchronizing monitor refresh rate with GPU frame rate (anti-tearing)
click to copy

Computer Fundamentals → Output Devices 1

Which monitor technology offers true blacks (no backlight bleed)?
OLED
click to copy