Input /Output Devices Questions and Answers

Q: Which of the following is not an output device ?

The one that is not an output device is the microphone.A microphone converts sound into an electrical signal that the computer records, so it sends data into the computer: it is an input device.The others take data out of the computer in a form people can use. A plotter draws large graphics on paper, headphones produce sound, and a projector displays the screen image on a wall or screen.

Q: Which of the following devices do you recommend most to use if someone wishes to connect a laptop to a classroom smartboard for high-resolution screencast ?

The best choice is HDMI.HDMI (High-Definition Multimedia Interface) carries uncompressed high-resolution digital video and audio over a single cable, which suits casting a laptop's screen to a smartboard or projector in high resolution.VGA is an older analogue video connection with lower quality and no audio. PS/2 is an old port for keyboards and mice, and a standard USB connection is used mainly for data and the smartboard's touch input rather than for high-resolution video.

Q: Keyboard is a type of ___________device?

A keyboard is an input device.Input devices send data and commands into the computer. Pressing a key sends a code for that character or command to the processor. The mouse, scanner, microphone and joystick are other input devices.Output devices, such as the monitor, printer and speakers, present results from the computer. Storage devices, like a hard disk or pen drive, keep data, and memory (RAM and ROM) holds the data and instructions the processor is working on. The keyboard does none of these.

Q: Mouse, joystick and trackball are examples of

They are pointing devices.A mouse, a joystick and a trackball all move a pointer or cursor on the screen and let the user select items by clicking, so they are classed as pointing input devices, along with touchpads and light pens.Scanning devices such as scanners and barcode readers capture images or codes; storage devices such as hard disks hold data; multimedia devices such as speakers and webcams handle sound and video.

Q: __________ captures videos that can be transferred via the internet in real time.

The device is a Web camera.A webcam is a small video camera connected to a computer or built into it. It captures video that can be streamed over the internet in real time, for video calls, meetings and online classes.A headset is a pair of headphones with a microphone, used for audio. A sound card processes audio signals inside the computer. An OMR (optical mark reader) reads marks on answer sheets such as this exam's. None of them captures video.

Q: Which of the following is NOT a function of the Barcode Reader?

The function a barcode reader does not perform is to print.A barcode reader is an input device. It shines light on the pattern of bars, captures and reads the reflected pattern, and decodes it into the numbers or letters it represents, which are sent to the computer, for example at a billing counter.Capturing, reading and translating the barcode into numerals or alphabets are all its functions. Printing barcodes is the job of a separate output device, a barcode or label printer.

Q: The type of screen used in gaming devices, clocks, watches, calculators and telephone is

The screen is LCD.Liquid crystal displays are thin, light and use very little power, which is why they are used in digital clocks, watches, calculators, telephones and handheld gaming devices. A calculator or watch can run for months or years on a small battery with an LCD.Plasma screens were used in large televisions and need much more power, and CRT (cathode ray tube) displays are bulky glass tubes used in old televisions and monitors. Neither fits small, battery-powered devices, so the options containing them are wrong.

Q: Which among the following is NOT a monitor?

The one that is not a monitor is the Projector.A monitor is a display screen connected to a computer. LCD, plasma and CRT are all types of monitor, named after the technology used to form the image: liquid crystals, ionised gas cells and a cathode ray tube.A projector is also an output device, but it throws the image onto a separate screen or wall using a lens and light source. It is not itself a monitor, which is why it is the answer.

Q: Which among the following is NOT a pointing device?

The keyed answer is Touchscreen.A pointing device moves a cursor on the screen. A trackball, a mouse and a touchpad all do this by sensing the user's movement of a ball, the whole device or a finger on a pad, and sending relative motion to the computer, so each is a typical pointing device.A touchscreen is touched directly on the display, which also shows the output, so it is a combined input and output surface and the question treats it as the odd one out. Many references do class a touchscreen as a pointing device as well, which is the weakness of the item; in this question the three that move a cursor are the ones counted.

Which of the following is not an output device ?

A.Plotter
B.Headphone
C.Microphone
D.Projector

Exam Year(s)

CBSE Assistant Secretary - 2024,

Answer: C

The one that is not an output device is the microphone.

A microphone converts sound into an electrical signal that the computer records, so it sends data into the computer: it is an input device.

The others take data out of the computer in a form people can use. A plotter draws large graphics on paper, headphones produce sound, and a projector displays the screen image on a wall or screen.

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Which of the following devices do you recommend most to use if someone wishes to connect a laptop to a classroom smartboard for high-resolution screencast ?

A.PS2
B.VGA
C.USB
D.HDMI

Exam Year(s)

CBSE Assistant Secretary - 2024,

Answer: D

The best choice is HDMI.

HDMI (High-Definition Multimedia Interface) carries uncompressed high-resolution digital video and audio over a single cable, which suits casting a laptop's screen to a smartboard or projector in high resolution.

VGA is an older analogue video connection with lower quality and no audio. PS/2 is an old port for keyboards and mice, and a standard USB connection is used mainly for data and the smartboard's touch input rather than for high-resolution video.

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Which of the following is NOT a digital input device for computers?

A.Digital camcorder
B.Microphone
C.Scanner
D.Printer

Exam Year(s)

DSSSB AE - 2023,

Answer: D

A digital input device sends data into the computer. A digital camcorder, a microphone (through a sound card, which digitises the sound) and a scanner all feed data to the computer and are input devices. A printer takes the output of the computer and puts it on paper, so it is an output device. The answer is the printer, option D.

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Keyboard is a type of ___________device?

A.Output.
B.Input.
C.Storage.
D.Memory.

Exam Year(s)

MP Lab Technician - 2015,

Answer: B

A keyboard is an input device.

Input devices send data and commands into the computer. Pressing a key sends a code for that character or command to the processor. The mouse, scanner, microphone and joystick are other input devices.

Output devices, such as the monitor, printer and speakers, present results from the computer. Storage devices, like a hard disk or pen drive, keep data, and memory (RAM and ROM) holds the data and instructions the processor is working on. The keyboard does none of these.

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Mouse, joystick and trackball are examples of

A.scanning devices
B.storing devices
C.pointing devices
D.multimedia devices

Exam Year(s)

MPPSC Forest Service - 2023,

Answer: C

They are pointing devices.

A mouse, a joystick and a trackball all move a pointer or cursor on the screen and let the user select items by clicking, so they are classed as pointing input devices, along with touchpads and light pens.

Scanning devices such as scanners and barcode readers capture images or codes; storage devices such as hard disks hold data; multimedia devices such as speakers and webcams handle sound and video.

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__________ captures videos that can be transferred via the internet in real time.

A.Headset
B.Web camera
C.Sound card
D.OMR

Exam Year(s)

RSMSSB - 2024, Rajasthan ANM - 2024,

Answer: B

The device is a Web camera.

A webcam is a small video camera connected to a computer or built into it. It captures video that can be streamed over the internet in real time, for video calls, meetings and online classes.

A headset is a pair of headphones with a microphone, used for audio. A sound card processes audio signals inside the computer. An OMR (optical mark reader) reads marks on answer sheets such as this exam's. None of them captures video.

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Which of the following is NOT a function of the Barcode Reader?

A.to capture information
B.to read information
C.to translate the barcode into numerals/ alphabets
D.to print

Exam Year(s)

RSMSSB - 2024, Rajasthan ANM - 2024,

Answer: D

The function a barcode reader does not perform is to print.

A barcode reader is an input device. It shines light on the pattern of bars, captures and reads the reflected pattern, and decodes it into the numbers or letters it represents, which are sent to the computer, for example at a billing counter.

Capturing, reading and translating the barcode into numerals or alphabets are all its functions. Printing barcodes is the job of a separate output device, a barcode or label printer.

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The type of screen used in gaming devices, clocks, watches, calculators and telephone is

A.LCD
B.Plasma and LCD
C.CRT
D.Plasma and CRT

Exam Year(s)

RSMSSB - 2024, Rajasthan ANM - 2024,

Answer: A

The screen is LCD.

Liquid crystal displays are thin, light and use very little power, which is why they are used in digital clocks, watches, calculators, telephones and handheld gaming devices. A calculator or watch can run for months or years on a small battery with an LCD.

Plasma screens were used in large televisions and need much more power, and CRT (cathode ray tube) displays are bulky glass tubes used in old televisions and monitors. Neither fits small, battery-powered devices, so the options containing them are wrong.

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Which among the following is NOT a monitor?

A.LCD
B.Projector
C.Plasma
D.CRT

Exam Year(s)

RSMSSB - 2024, Rajasthan ANM - 2024,

Answer: B

The one that is not a monitor is the Projector.

A monitor is a display screen connected to a computer. LCD, plasma and CRT are all types of monitor, named after the technology used to form the image: liquid crystals, ionised gas cells and a cathode ray tube.

A projector is also an output device, but it throws the image onto a separate screen or wall using a lens and light source. It is not itself a monitor, which is why it is the answer.

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10.

Which among the following is NOT a pointing device?

A.Trackball
B.Mouse
C.Touchscreen
D.Touchpad

Exam Year(s)

RSMSSB - 2024, Rajasthan ANM - 2024,

Answer: C

The keyed answer is Touchscreen.

A pointing device moves a cursor on the screen. A trackball, a mouse and a touchpad all do this by sensing the user's movement of a ball, the whole device or a finger on a pad, and sending relative motion to the computer, so each is a typical pointing device.

A touchscreen is touched directly on the display, which also shows the output, so it is a combined input and output surface and the question treats it as the odd one out. Many references do class a touchscreen as a pointing device as well, which is the weakness of the item; in this question the three that move a cursor are the ones counted.

Discuss in Forum

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