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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.

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Computer Fundamentals → Introduction to Computer 16

Which device is used to capture handwritten signatures digitally?
Digitizer tablet
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Inkjet printers produce output by?
Spraying ink droplets
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PPM in context of printers stands for?
Pages Per Minute
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Which device is used to read printed bar codes on postal mail?
Barcode reader
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Which of the following is an impact printer?
Dot matrix printer
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The function key F5 in most applications is used to?
Refresh
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Which device converts sound waves to digital signals?
Microphone with ADC
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OLED stands for?
Organic Light Emitting Diode
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A scanner's resolution is measured in?
DPI
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Which of the following is a soft copy output?
Data on monitor
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Hard copy output refers to?
Printed output on paper
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Haptic feedback is related to which type of output?
Tactile
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What does the Num Lock key do?
Locks numeric keypad
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Which pointing device is built into laptop computers?
Trackpad (Touchpad)
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A webcam is used for?
Capturing real-time video
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Which memory is volatile in nature?
RAM
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Computer Fundamentals → Output Devices 9

A CRT monitor works on the principle of?
Electron beam scanning
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Resolution of a monitor is measured in?
Pixels
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A dot matrix printer is an example of?
Impact printer
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Which output device converts digital data to audio signals?
Speaker
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Refresh rate of a monitor is measured in?
Hz
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LCD stands for?
Liquid Crystal Display
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Which printer type is most suitable for carbon copies?
Dot matrix
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Which output device is used by architects to draw plans?
Plotter
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Which type of monitor has the best viewing angle?
IPS panel
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Computer Fundamentals → Input Devices 10

Which input device allows voice input to a computer?
Microphone
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Which type of scanner captures images using a linear array of sensors?
Flatbed
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Which keyboard layout is most commonly used?
QWERTY
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Light pen works with which type of display?
CRT
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A joystick is primarily used for?
Gaming and simulation
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Which input device uses infrared or laser light for movement detection?
Optical mouse
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QWERTY keyboard was designed by?
Christopher Latham Sholes
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Keyboard is an example of which type of input device?
Text input device
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Which input device is used to input data from handwritten forms?
OCR
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Which of the following measures the speed of a keyboard?
WPM
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Computer Fundamentals → Memory Units 4

Which device reads data from magnetic stripe on credit cards?
Magnetic stripe reader
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RAM stands for?
Random Access Memory
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ROM stands for?
Read Only Memory
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Cache memory is located?
Between CPU and RAM
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Computer Fundamentals → Internet Basics 1

Which device allows a computer to connect to the internet via phone line?
Modem
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