A light sensitive device that converts drawing, printed text or other images into digital form is
Answer: C
Correct answer: Scanner
A scanner shines light on a page and converts the reflected pattern into a digital image, which is exactly what the question describes. A plotter draws on paper and OMR reads only pencil marks in fixed positions rather than whole images.
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What type devices are computer speakers or headphones?
Answer: D
Correct answer: Output
Speakers and headphones deliver sound from the computer to the listener, so they carry information outwards. A microphone would be the corresponding input device.
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The _____________ pen is a small input device used to select and display objects on a screen.
Answer: C
Correct answer: Light
A light pen is held against the screen and detects the light emitted at the point it touches, which tells the computer where it is pointing. There is no such input device as an ink pen or a magnetic pen.
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Which of the following is not an output device?
Answer: C
Correct answer: Scanner
A scanner reads a document and sends the image into the computer, so it is an input device. Plotters, printers and monitors all present results to the user and are therefore outputs.
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Speed of the printer is limited by the speed of
Answer: B
Correct answer: paper movements
However fast the print mechanism itself works, no line can be printed until the paper has been advanced into position, so the mechanical movement of the paper sets the ceiling on printing speed. The cartridge holds ink or toner and does not govern the rate at which the page advances.
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________ keys are present on the top row of the keyboard.
Answer: A
Correct answer: Function
The function keys, F1 to F12, run along the top row above the number keys. The typewriter keys occupy the main block, the numeric keys the pad on the right, and the navigation keys the cluster between them.
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Joysticks typically have a button on __________that is used to select the option pointed by the cursor.
Answer: D
Correct answer: Top
The fire or select button sits on top of the stick, under the thumb of the hand already holding it, so the user can select without letting go.
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Which of the following is not an example of hardware?
Answer: D
Correct answer: Interpreter
An interpreter is a program that executes source code line by line, so it is software. Scanners, printers and monitors are all physical devices and therefore hardware.
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The OCR recognises the _______ of the characters with the help of light source.
Answer: B
Correct answer: shape
Optical Character Recognition shines light on the page and reads the pattern of light and dark to work out the shape of each character, which it then matches against the shapes it knows. Size, colour and ink are irrelevant to that matching, which is why OCR can read many typefaces.
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What type of device is a digital camera?
Answer: A
Correct answer: Input
A digital camera captures an image and passes it to the computer, so it supplies data to the machine. Storage is what the memory card inside it does; the camera's role in relation to the computer is input.
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