Input and output devices MCQ — 5 Practice Questions with Answers

Explanation

An input device is used to send data, commands or signals into a computer. A mouse is an input device because it lets the user point, click, select, drag and give instructions to the system. A speaker produces sound from the computer, so it is an output device. A printer gives a hard copy of digital content, so it is also an output device. A Visual Display Unit shows text, images and video on a screen, which again makes it an output device. Hence, the input device among the given choices is the mouse.

Explanation

A digitizer converts drawings, maps, or other analogue input into digital form, so it is an input device, not an output device. MICR characters are commonly pre-printed on bank cheques so that machines can read cheque information reliably. A trackball and a joystick both control pointer movement and are treated as pointing devices like a mouse. OCR correctly expands to Optical Character Recognition, the technology used to recognise printed or handwritten characters from scanned images.

Explanation

A keyboard is the standard input device used to enter letters, numbers and special characters such as punctuation marks and symbols into a computer. A mouse is also an input device, but it is mainly used for pointing, selecting and clicking rather than typing characters. A monitor is an output device because it displays information produced by the computer. A printer is also an output device because it produces a hard copy of text or images. Therefore, the device matching the character-entry function is the keyboard.

Explanation

A speaker is an output device because it receives signals from the computer and produces sound for the user. A mouse is an input device used to point, click and select items. A keyboard is also an input device because it sends typed characters and commands to the computer. A joystick is mainly an input device used to control movement, especially in games or simulations. The question asks for a device that gives information out from the computer, and the speaker fits that role.

Explanation

A monitor is an output device because it displays processed information from the computer to the user. A trackball is an input device used to move the pointer and give commands. An image scanner sends images or documents into the computer as digital data, so it is also an input device. A joystick is used to control movement or direction, especially in games and simulations, and it provides input to the system. Thus the device that is not an input device is the monitor.