Input /Output Devices Questions and Answers

Answer: A

The key's answer is the Comparator.

A digital comparator compares an input value with a reference value held in digital form and reports whether the input is equal to, greater than or less than it. Its whole function depends on that digital reference.

Tracking hardware and a stylus are input devices that report positions; they do not work by comparison with a reference value. Since a comparator does, 'None of the above' is wrong.

Answer: D

Correct answer: Keyboard

Text and numbers are typed, and the keyboard is the device for typing. A scanner captures an image of a page rather than its characters, and printers and plotters are output devices.

Answer: B

Correct answer: Non-impact printer

Non-impact printers - laser and inkjet - form characters without striking the paper, so they are quieter and produce far finer detail than impact printers, which press an inked ribbon against the page through a matrix of pins.

Answer: D

Correct answer: View or print data

Output devices present results: the monitor displays them and the printer puts them on paper. Entering, storing and scanning are the work of input and storage devices.

Answer: D

Correct answer: Hardware

Hardware is the collective term for the physical parts of a computer, which includes every input and output device. Software is the set of programs, and a monitor is one output device rather than the class.

Answer: B

Correct answer: Output

An output device is the one that carries information from the computer to the person - the monitor, the printer, the speakers. Input devices carry information the other way.

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.

Answer: C

Correct answer: Printer

A hard copy is output on paper, and the printer is the device that produces it. A CRT or console shows output on a screen, which is soft copy, and a card reader is an input device.

Answer: A

Correct answer: Input

Data supplied to a program from outside is its input; what the program sends back is its output. Throughput is a measure of how much work a system completes, and a report is one form output may take.

Answer: A

Correct answer: Input

An input device is the one through which information is put into the machine - keyboard, mouse, scanner, microphone. Output devices deliver results in the opposite direction.