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Input /Output Devices Questions and Answers

51.

Which technology converts printed text on a scanned page into editable digital text ?

Answer: C

Correct answer: OCR

Optical Character Recognition analyses the shapes of printed characters and produces machine-encoded text. OMR only detects whether a mark is present, and MICR reads magnetically encoded characters such as those on a cheque.

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52.

A device for converting handwritten impressions into coded characters & positional coordinates for input to a computer is

Answer: D

Correct answer: Writing tablet

A writing tablet, or graphics tablet, senses the position of a stylus on its surface, so it captures both the character being written and where on the surface it was written - the coded character and the positional coordinates the question asks for.

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53.

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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54.

The joystick is a ____________ stick that moves the graphic cursor in the direction the stick is moved.

Answer: D

Correct answer: Vertical

A joystick is a stick standing upright in a base; tilting it from the vertical in any direction moves the cursor that way. The other three words describe orientations that would leave nothing to tilt.

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55.

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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