Q71. Which device is commonly used for biometric identification?
a) Keyboard
b) Fingerprint Scanner
c) Monitor
d) Printer
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Correct Answer: b) Fingerprint Scanner
Explanation: A fingerprint scanner is a biometric input device that captures a person’s fingerprint for identification and authentication purposes, often used in security systems.
Q72. What type of device is a microphone?
a) Input Device
b) Output Device
c) Storage Device
d) Processing Device
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Correct Answer: a) Input Device
Explanation: A microphone is an input device that captures audio signals from the environment and converts them into digital data for processing by a computer.
Q73. Which of the following devices is used to display digital content on a large screen, often in presentations?
a) Printer
b) Monitor
c) Projector
d) Speaker
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Correct Answer: c) Projector
Explanation: A projector is an output device used to display digital content, such as presentations, videos, or images, on a large screen or surface.
Q74. Which type of printer uses a toner cartridge to produce prints?
a) Inkjet Printer
b) Dot Matrix Printer
c) Laser Printer
d) Thermal Printer
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Correct Answer: c) Laser Printer
Explanation: A laser printer uses a toner cartridge filled with fine powder (toner) and a laser beam to produce high-quality prints, particularly suited for text and images.
Q75. What is the primary function of a barcode reader?
a) To display information
b) To store information
c) To read and decode barcodes
d) To print barcodes
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Correct Answer: c) To read and decode barcodes
Explanation: A barcode reader is an input device that scans and decodes barcodes printed on products, allowing quick data entry, commonly used in retail and inventory management.
Q76. Which output device is commonly used for gaming to provide haptic feedback?
a) Printer
b) Mouse
c) Keyboard
d) Game Controller
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Correct Answer: d) Game Controller
Explanation: A game controller is an input/output device that often provides haptic feedback, such as vibrations, to enhance the gaming experience by simulating real-world actions.
Q77. What kind of display technology is used in most modern computer monitors?
a) CRT
b) LCD
c) LED
d) Plasma
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Correct Answer: c) LED
Explanation: Most modern computer monitors use LED (Light Emitting Diode) technology, which offers better brightness, energy efficiency, and color accuracy compared to older technologies like CRT and LCD.
Q78. Which of the following devices is used to capture video?
a) Printer
b) Microphone
c) Webcam
d) Plotter
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Correct Answer: c) Webcam
Explanation: A webcam is an input device that captures video, allowing users to stream or record video content, commonly used in video conferencing and live streaming.
Q79. What is the function of a scanner in a computer system?
a) To output printed documents
b) To input printed documents into digital format
c) To store documents
d) To process data
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Correct Answer: b) To input printed documents into digital format
Explanation: A scanner is an input device that converts physical documents into digital format, allowing them to be stored, edited, or shared electronically.
Q80. Which of the following is a pointing device used to control the position of the cursor on a screen?
a) Printer
b) Monitor
c) Mouse
d) Keyboard
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Correct Answer: c) Mouse
Explanation: A mouse is a pointing device used to control the position of the cursor on a computer screen, allowing users to interact with the graphical user interface (GUI) by clicking, dragging, and dropping objects.