Computer Input Output Devices Competitive Exams
30 questions · Basic Computer & IT
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Question 1 of 30
Output displayed on a screen is called
ExplanationIt cannot be touched and disappears when the screen is switched off.
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Question 2 of 30
A scanner is used to
ExplanationThe flatbed scanner is the most common type.
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Question 3 of 30
Which of the following monitors is the thinnest?
ExplanationCRT monitors are bulky.
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Question 4 of 30
A barcode reader is used in shops to
ExplanationIt uses light reflected from the bars.
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Question 5 of 30
A joystick is mostly used for
ExplanationIt is a pointing device.
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Question 6 of 30
Output printed on paper is called
ExplanationIt is a physical copy.
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Question 7 of 30
Magnetic Ink Character Recognition (MICR) is used by banks for
ExplanationCharacters are printed in magnetic ink.
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Question 8 of 30
The key used to delete the character to the left of the cursor is
ExplanationThe Delete key removes the character to the right of the cursor or the selected item.
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Question 9 of 30
Optical Character Recognition (OCR) is used to
ExplanationIt recognises letters in images.
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Question 10 of 30
A microphone is used to
ExplanationIt converts sound into electrical signals.
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Question 11 of 30
The printer speed is often measured in
ExplanationThe print quality is measured in dots per inch (DPI).
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Question 12 of 30
A webcam is used to
ExplanationIt is an input device.
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Question 13 of 30
A pointing device that is moved on a flat surface to control the cursor is the
ExplanationMost mice have two buttons and a scroll wheel.
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Question 14 of 30
Which of the following is an output device?
ExplanationA monitor displays text, images and video.
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Question 15 of 30
A touch screen is a device that
ExplanationIt displays information and accepts touch.
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Question 16 of 30
The Caps Lock key is used to
ExplanationPressing it again returns to small letters.
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Question 17 of 30
A fingerprint scanner is an example of a
ExplanationIt identifies a person by a body feature.
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Question 18 of 30
The screen display is made up of tiny dots called
ExplanationMore pixels give a sharper image.
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Question 19 of 30
The Enter key is used to
ExplanationIt is also called the Return key.
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Question 20 of 30
A projector is used to
ExplanationIt is used in classrooms and meetings.
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Question 21 of 30
A plotter is used to print
ExplanationIt draws using pens or ink on large sheets.
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Question 22 of 30
An input device is used to
ExplanationExamples are the keyboard, mouse, scanner and microphone.
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Question 23 of 30
Optical Mark Reader (OMR) is used to
ExplanationIt detects marks made with pencil in bubbles.
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Question 24 of 30
A touchpad is commonly found on
ExplanationIt replaces the mouse on a laptop.
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Question 25 of 30
A printer that produces the best quality text quickly using toner is the
ExplanationIt is widely used in offices.
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Question 26 of 30
A printer that strikes the paper through an inked ribbon is
ExplanationIt is an impact printer and can print carbon copies.
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Question 27 of 30
The keys F1 to F12 are called
ExplanationEach performs a special task depending on the program.
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Question 28 of 30
A printer that sprays liquid ink onto paper is the
ExplanationIt is popular for colour printing at home.
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Question 29 of 30
The function key used to get Help in most programs is
ExplanationF5 refreshes a page and F2 renames a selected file.
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Question 30 of 30
Speakers and headphones are used to
ExplanationThey are output devices.
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