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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 21

The first electronic computer ENIAC was built in the year?
1946
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Reduced size, cost and power consumption are advantages of?
Both B and C
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Which language is closest to machine language?
Assembly
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EDVAC was designed on the principle of?
Stored program concept
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Which generation computers used semiconductor memory?
Third
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Power consumption was extremely high in?
First generation
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Which generation introduced online storage and real-time processing?
Third
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The transistor was invented at Bell Laboratories in?
1947
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Which of the following is an example of a pointing device?
Mouse
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OCR stands for?
Optical Character Recognition
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A trackball is an example of which type of device?
Input
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MICR stands for?
Magnetic Ink Character Recognition
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Which device converts digital signals to analog for telephone transmission?
Modem
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Touch screen is which type of device?
Both input and output
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DPI stands for in context of printers?
Dots Per Inch
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Which is the fastest type of printer?
Laser
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OMR stands for?
Optical Mark Recognition
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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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Computer Fundamentals → Memory Units 2

Which generation used magnetic tape for secondary storage?
Both A and B
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Which device reads data from magnetic stripe on credit cards?
Magnetic stripe reader
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Computer Fundamentals → Generations of Computer 1

The first generation computer that was commercially successful?
UNIVAC I
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Computer Fundamentals → Output Devices 9

Which of the following is NOT an output device?
Scanner
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A plotter is used to print?
Large drawings and graphs
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Which printer uses heat to produce images on special paper?
Thermal
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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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Computer Fundamentals → Input Devices 7

Which input device is used in supermarkets to read product codes?
Barcode reader
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The keyboard shortcut to copy selected text is?
Ctrl+C
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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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