1. Which of the following is an example of an input device?
A) Printer
B) Keyboard
C) Monitor
D) Speaker
Answer: B
Explanation: A keyboard is used to enter data and instructions into the computer, making it an input device.
2. Which device uses a light-sensitive detector to convert printed text into digital data?
A) Scanner
B) Printer
C) Plotter
D) Joystick
Answer: A
Explanation: Scanners read images or text from paper and convert them into digital form.
3. What type of input device is a joystick?
A) Pointing device
B) Output device
C) Storage device
D) Display device
Answer: A
Explanation: A joystick is used to control the movement of a pointer or cursor in games and simulations.
4. Which input device is used for biometric authentication using fingerprints?
A) OCR
B) Barcode Reader
C) Fingerprint Scanner
D) Trackball
Answer: C
Explanation: Fingerprint scanners match the unique patterns of a person’s fingerprint for security purposes.
5. What does OCR stand for?
A) Optical Character Reader
B) Optical Code Recognizer
C) Output Character Reader
D) Optical Chart Recorder
Answer: A
Explanation: OCR converts scanned images of text into machine-readable text.
6. Which input device works by detecting reflected light from a surface?
A) Mouse
B) Light Pen
C) Microphone
D) Projector
Answer: B
Explanation: Light pens detect light from the monitor screen and are used to draw or select items.
7. Which of the following is NOT an input device?
A) Barcode Reader
B) Microphone
C) Webcam
D) Projector
Answer: D
Explanation: A projector is an output device; it displays images onto a screen.
8. A trackball is similar to a _______.
A) Keyboard
B) Mouse
C) Printer
D) Scanner
Answer: B
Explanation: A trackball controls the pointer on the screen like a mouse but uses a stationary ball.
9. Which input device can capture motion?
A) Webcam
B) Microphone
C) Motion Sensor
D) Both a and c
Answer: D
Explanation: Webcams capture live video, and motion sensors detect movement.
10. MICR technology is used in ________.
A) Airports
B) Banking
C) Hospitals
D) Schools
Answer: B
Explanation: MICR (Magnetic Ink Character Recognition) is used to read special characters on cheques.
11. Which of the following is an example of an output device?
A) Mouse
B) Printer
C) Scanner
D) Joystick
Answer: B
Explanation: Printers produce a hard copy of digital information, making them output devices.
12. Which type of printer sprays ink directly onto paper?
A) Laser printer
B) Dot-matrix printer
C) Inkjet printer
D) Thermal printer
Answer: C
Explanation: Inkjet printers spray tiny droplets of ink to form an image.
13. Which output device is used for large-scale technical drawings?
A) Plotter
B) Inkjet printer
C) Monitor
D) Projector
Answer: A
Explanation: Plotters draw vector graphics, often used for engineering and architectural designs.
14. What does DPI stand for in printing?
A) Dots per Inch
B) Data per Input
C) Display Pixel Index
D) Digital Print Integration
Answer: A
Explanation: DPI measures the resolution of a printer; higher DPI means better print quality.
15. Which device is used to project computer output onto a large screen?
A) Monitor
B) Projector
C) Plotter
D) Printer
Answer: B
Explanation: Projectors display output from a computer onto a bigger screen for presentations.
16. Which of the following is NOT a soft copy output device?
A) Monitor
B) Projector
C) Speaker
D) Printer
Answer: D
Explanation: Printers produce hard copy output; others produce soft copy.
17. LCD stands for _______.
A) Liquid Crystal Display
B) Light Crystal Device
C) Liquid Computer Display
D) Light Control Device
Answer: A
Explanation: LCD technology is used in flat-panel displays.
18. Which type of monitor uses electron beams to create images?
A) LCD
B) LED
C) CRT
D) OLED
Answer: C
Explanation: Cathode Ray Tube (CRT) monitors use electron beams to display images.
19. What is the main advantage of LED monitors over LCD monitors?
A) More expensive
B) Less energy consumption
C) Lower brightness
D) bigger size
Answer: B
Explanation: LED monitors are more energy-efficient and offer better display quality.
20. Which output device produces sound?
A) Microphone
B) Printer
C) Speaker
D) Scanner
Answer: B
Explanation: Speakers convert digital signals into audible sound.
21. Which device reads data encoded in a barcode?
A) MICR
B) OCR
C) Barcode Reader
D) Plotter
Answer: C
Explanation: Barcode readers scan black-and-white stripes to retrieve product information.
22. Which of these is a pointing device?
A) Printer
B) Scanner
C) Mouse
D) Keyboard
Answer: C
Explanation: A mouse controls the pointer on the screen.
23. A graphics tablet is used for ________.
A) Printing
B) Drawing
C) Scanning
D) Projecting
Answer: B
Explanation: Graphics tablets allow designers to draw directly into the computer.
24. Which of the following is used for voice input?
A) Joystick
B) Microphone
C) Light pen
D) Touchpad
Answer: B
Explanation: Microphones convert sound waves into digital signals.
25. The touchpad on a laptop is an example of ________.
A) Output device
B) Pointing device
C) Printing device
D) Storage device
Answer: B
Explanation: Touchpads allow control of the pointer without a separate mouse.
26. Which device uses infrared or laser light to detect motion?
A) Scanner
B) Optical Mouse
C) Webcam
D) Trackball
Answer: B
Explanation: Optical mice use light to detect movement on a surface.
27. A stylus is mainly used with ________.
A) Monitors
B) Touchscreens
C) Printers
D) Projectors
Answer: B
Explanation: A stylus is used for precise input on touchscreens.
28. Which input device captures images in real-time?
A) Printer
B) Webcam
C) Projector
D) Joystick
Answer: B
Explanation: Webcams are used for live video input.
29. Which of these is NOT a human interface input device?
A) Keyboard
B) Mouse
C) Scanner
D) CPU
Answer: D
Explanation: The CPU is the processing unit, not an input device.
30. Which of these is a gesture-based input device?
A) Kinect Sensor
B) Printer
C) Light pen
D) Barcode reader
Answer: A
Explanation: Kinect detects body movement for input.
31. Which printer is best for printing carbon copies?
A) Laser printer
B) Dot-matrix printer
C) Inkjet printer
D) Thermal printer
Answer: B
Explanation: Dot-matrix printers can print multiple copies using carbon paper.
32. Which type of display offers the highest contrast ratio?
A) LCD
B) LED
C) OLED
D) CRT
Answer: C
Explanation: OLED displays have deeper blacks and better contrast.
33. Which printer technology uses toner?
A) Laser printer
B) Inkjet printer
C) Thermal printer
D) Plotter
Answer: A
Explanation: Laser printers use toner powder for high-speed printing.
34. Which device can produce a 3D hard copy?
A) Laser printer
B) 3D printer
C) Plotter
D) Inkjet printer
Answer: B
Explanation: 3D printers create solid objects from digital models.
35. Which output device is used in ATMs to print receipts?
A) Inkjet printer
B) Thermal printer
C) Laser printer
D) Plotter
Answer: B
Explanation: Thermal printers are small, quiet, and fast for receipts.
36. Which device produces output in Braille for the visually impaired?
A) Screen reader
B) Braille embosser
C) Laser printer
D) Projector
Answer: B
Explanation: Braille embossers print raised dots for tactile reading.
37. Which type of monitor is most commonly used in laptops?
A) CRT
B) LCD
C) LED
D) OLED
Answer: B
Explanation: LED-backlit LCDs are common in laptops due to low power consumption.
38. What is the main advantage of laser printers over inkjet printers?
A) Higher cost per page
B) Slower speed
C) Faster and more cost-effective for bulk printing
D) Poor quality
Answer: C
Explanation: Laser printers are ideal for high-volume printing.
39. Which device converts digital video signals to be displayed on a screen?
A) Scanner
B) Projector
C) Graphics card
D) Printer
Answer: C
Explanation: Graphics cards process and output video signals.
40. Which monitor technology has the thinnest panels?
A) CRT
B) LCD
C) LED
D) OLED
Answer: C
Explanation: OLED panels can be extremely thin and flexible.
41. Which of these is BOTH an input and output device?
A) Keyboard
B) Touchscreen
C) Printer
D) Microphone
Answer: B
Explanation: Touchscreens allow input by touch and output by displaying visuals.
42. Which device is used to read and write data on CDs?
A) CD-ROM
B) CD-RW drive
C) DVD drive
D) Blu-ray player
Answer: B
Explanation: CD-RW drives can read and write CDs.
43. Which device can be used for gaming input?
A) Mouse
B) Joystick
C) Gamepad
D) All of the above
Answer: D
Explanation: All listed devices can be used for gaming input.
44. Which is the fastest type of printer?
A) Dot-matrix
B) Inkjet
C) Laser
D) Plotter
Answer: C
Explanation: Laser printers are faster than inkjet and dot-matrix printers.
45. Which device is used in retail stores to speed up billing?
A) Printer
B) Barcode scanner
C) Projector
D) Plotter
Answer: B
Explanation: Barcode scanners read product codes instantly.
46. The refresh rate of a monitor is measured in ________.
A) DPI
B) Hertz (Hz)
C) Pixels
D) Bits
Answer: B
Explanation: Refresh rate is the number of times a screen updates per second.
47. Which is an example of a speech output device?
A) Microphone
B) Speaker
C) Joystick
D) Scanner
Answer: B
Explanation: Speakers produce audible output.
48. Which of these devices can work wirelessly?
A) Wireless mouse
B) Wireless printer
C) Bluetooth speaker
D) All of the above
Answer: D
Explanation: All listed devices have wireless versions.
49. Which device converts printed documents into digital form?
A) Printer
B) Scanner
C) Monitor
D) Projector
Answer: B
Explanation: Scanners digitize physical documents.
50. What is the resolution of an output device measured in?
A) Hz
B) DPI / PPI
C) Bytes
D) Hertz per inch
Answer: B
Explanation: Printers use DPI; monitors use PPI.
51. Which device is used to enter handwritten signatures into a computer?
A) Mouse
B) Scanner
C) Graphics Tablet
D) Webcam
Answer: C
Explanation: Graphics tablets can capture handwriting and signatures digitally.
52. Which device reads information from a smart card?
A) MICR
B) Smart Card Reader
C) Barcode Scanner
D) OCR
Answer: B
Explanation: Smart card readers read the chip data embedded in cards.
53. What does LED stand for?
A) Light Emitting Display
B) Light Emitting Diode
C) Low Energy Display
D) Light Enhanced Device.
Answer: B
Explanation: LEDs are semiconductor devices that emit light when current passes through.
54. Which printer uses a heated pin to print on heat-sensitive paper?
A) Laser Printer
B) Inkjet Printer
C) Thermal Printer
D) Dot-matrix Printer
Answer: C
Explanation: Thermal printers burn the image into heat-sensitive paper.
55. Which of these is NOT an example of an output device?
A) Printer
B) Monitor
C) Speaker
D) Webcam
Answer: C
Explanation: A webcam is an input device.
56. Which input device can read QR codes?
A) OCR
B) Barcode Scanner
C) QR Scanner
D) Light Pen
Answer: C
Explanation: QR scanners decode QR (Quick Response) codes.
57. Which monitor technology uses plasma gas?
A) CRT
B) LCD
C) Plasma Display
D) LED
Answer: C
Explanation: Plasma displays use ionized gas to create images.
58. The device used to capture geographical data is called ________.
A) GPS Receiver
B) Barcode Reader
C) OCR
D) Webcam
Answer: A
Explanation: GPS receivers capture location-based input.
59. Which device is used to measure the speed of typing?
A) Mouse
B) Keyboard
C) Typing Tutor Software
D) Scanner
Answer: C
Explanation: Typing tutor programs measure speed and accuracy.
60. Which printer is best suited for printing on multipart forms?
A) Dot-matrix Printer
B) Laser Printer
C) Inkjet Printer
D) Thermal Printer
Answer: A
Explanation: Dot-matrix printers can impact-print through multiple layers.
61. Which device converts sound into electrical signals?
A) Speaker
B) Microphone
C) Printer
D) Monitor
Answer: B
Explanation: Microphones are input devices that record sound.
62. Which device is used for reading books in digital format aloud?
A) OCR + Text-to-Speech Software
B) Scanner only
C) Printer only
D) Monitor only
Answer: A
Explanation: OCR digitizes text, then TTS reads it aloud
63. The pointing stick in laptops is also called a ________.
A) Trackpoint
B) Trackball
C) Touchpad
D) Mouse
Answer: A
Explanation: Trackpoints are small joystick-like controls embedded in laptop keyboards.
64. Which of the following is NOT a type of monitor port?
A) VGA
B) HDMI
C) DVI
D) MICR
Answer: D
Explanation: MICR is an input technology for banking, not a monitor port.
65. Which device is used for producing high-quality photographic prints?
A) Dot-matrix Printer
B) Inkjet Printer
C) Laser Printer
D) Thermal Printer
Answer: B
Explanation: Inkjet printers produce high-resolution photo prints.
66. Which output device is used in cinemas for large-screen display?
A) LED Monitor
B) Projector
C) Plotter
D) Printer
Answer: B
Explanation: Projectors display video output on large screens.
67. The main difference between impact and non-impact printers is ________.
A) Cost
B) Whether they strike the paper
C) Speed
D) Resolution
Answer: B
Explanation: Impact printers hit the paper, non-impact printers do not.
68. Which device can be used for both scanning and copying?
A) Printer only
B) Photocopier
C) Plotter
D) Projector
Answer: B
Explanation: Photocopiers scan and print copies instantly.
69. Which input device is commonly used for inventory management?
A) Barcode Scanner
B) Plotter
C) Printer
D) Projector
Answer: A
Explanation: Barcode scanners read product data for inventory systems.
70. Which device converts graphical output into physical form for engineers?
A) Plotter
B) Printer
C) Projector
D) Scanner
Answer: A
Explanation: Plotters print vector-based engineering drawings
71. Which technology allows virtual reality input?
A) Joystick
B) VR Headset + Motion Controller
C) Light Pen
D) Scanner
Answer: B
Explanation: VR input devices track head and hand movements.
72. Which of these is an electromechanical output device?
A) Printer
B) Monitor
C) Speaker
D) All of the above
Answer: A
Explanation: Printers use mechanical parts to create physical output.
73. Which input device works with CAD software for design precision?
A) Mouse
B) Graphics Tablet
C) Keyboard
D) Trackpad
Answer: B
Explanation: Designers use tablets for precise drawing in CAD.
74. Which device displays visual output to multiple monitors?
A) VGA splitter
B) Mouse
C) Printer
D) Scanner
Answer: A
Explanation: VGA splitters send the same video signal to multiple screens.
75. Which device converts images into digital form for editing?
A) Printer
B) Scanner
C) Monitor
D) Projector
Answer: B
Explanation: Scanners digitize images for storage and editing.
76. Which printer is most common in offices for high-volume printing?
A) Laser Printer
B) Inkjet Printer
C) Dot-matrix Printer
D) 3D Printer
Answer: A
Explanation: Laser printers are fast and cost-effective for bulk printing.
77. Which monitor type offers touch functionality?
A) LED Monitor
B) LCD Monitor
C) Touchscreen Monitor
D) CRT Monitor
Answer: C
Explanation: These monitors combine display and input in one device.
78. Which input device detects physical pressure?
A) Microphone
B) Pressure Sensor
C) Light Pen
D) Joystick
Answer: B
Explanation: Pressure sensors measure force applied to them.
79. Which device outputs sound for multimedia applications?
A) Microphone
B) Speaker
C) Joystick
D) Printer
Answer: B
Explanation: Speakers produce sound output.
80. Which device is used for taking high-quality digital photographs?
A) Webcam
B) DSLR Camera
C) Scanner
D) Projector
Answer: B
Explanation: DSLRs capture high-resolution digital images.
81. What does PPI stand for?
A) Pixels Per Inch
B) Pages Per Inch
C) Points Per Input
D) Pixels Per Input
Answer: A
Explanation: PPI measures display resolution.
82. Which device is used for reading data from punched cards?
A) OCR
B) Card Reader
C) Plotter
D) Printer
Answer: B
Explanation: Card readers were used in early computing to read punched card data.
83. Which printer can print on both sides of the paper automatically?
A) Simplex Printer
B) Duplex Printer
C) Impact Printer
D) Thermal Printer
Answer: B
Explanation: Duplex printers support double-sided printing.
84. Which monitor is best for color accuracy?
A) OLED Monitor
B) CRT Monitor
C) LED Monitor
D) LCD Monitor
Answer: A
Explanation: OLEDs offer high color accuracy and contrast.
85. Which input device is used for 3D object scanning?
A) Laser Scanner
B) OCR
C) Barcode Reader
D) Touchpad
Answer: A
Explanation: Laser scanners capture 3D shape data.
86. Which of these is NOT an example of an input device?
A) Joystick
B) Mouse
C) Projector
D) Keyboard
Answer: C
Explanation: A projector is an output device.
87. Which printer is the quietest during operation?
A) Dot-matrix Printer
B) Laser Printer
C) Inkjet Printer
D) Thermal Printer
Answer: D
Explanation: Thermal printers are nearly silent.
88. Which device allows video conferencing?
A) Webcam
B) Projector
C) Printer
D) Scanner
Answer: A
Explanation: Webcams capture live video for conferencing.
89. Which is the unit of display brightness?
A) Lumen
B) DPI
C) Hertz
D) Pixel
Answer: A
Explanation: Brightness of displays/projectors is measured in lumens.
90. Which device is used to print blueprints?
A) Plotter
B) Laser Printer
C) Inkjet Printer
D) Dot-matrix Printer
Answer: A
Explanation: Plotters are used for large-scale blueprint printing.
91. Which technology allows a printer to print without ink?
A) Thermal Printing
B) Inkjet Printing
C) Laser Printing
D) Impact Printing
Answer: A
Explanation: Thermal printing uses heat-sensitive paper.
92. Which input device reads marks on OMR sheets?
A) OCR
B) OMR Scanner
C) Barcode Reader
D) MICR
Answer: B
Explanation: OMR scanners detect marks for exams and surveys.
93. Which device is used for interactive presentations?
A) Projector + Interactive Whiteboard
B) Printer
C) Plotter
D) Scanner
Answer: A
Explanation: Interactive boards allow touch input during presentations.
94. Which device outputs hard copies at the fastest speed?
A) Inkjet Printer
B) Laser Printer
C) Dot-matrix Printer
D) Thermal Printer
Answer: B
Explanation: Laser printers are the fastest for high-volume printing.
95. Which monitor type is most energy-efficient?
A) CRT
B) LED
C) LCD
D) Plasma
Answer: B
Explanation: LED monitors consume the least power.
96. Which device is required for a digital signature?
A) Smart Card + Reader
B) Webcam
C) Printer
D) Joystick
Answer: A
Explanation: Digital signatures require cryptographic keys stored on smart cards.
97. Which printer sprays tiny drops of liquid onto paper?
A) Laser Printer
B) Inkjet Printer
C) Dot-matrix Printer
D) Thermal Printer
Answer: B
Explanation: Inkjet printers spray ink for image formation.
98. Which device outputs tactile feedback?
A) Joystick with vibration
B) Speaker
C) Monitor
D) Projector
Answer: A
Explanation: Joysticks with vibration provide haptic (tactile) feedback.
99. Which display technology is used in smartwatches?
A) OLED
B) CRT
C) Plasma
D) Dot-matrix
Answer: A
Explanation: OLED is used in wearables for high contrast and low power.
100. Which device is used to magnify computer output for the visually impaired?
A) Screen Magnifier Software
B) Printer
C) Projector
D) Speaker
Answer: A
Explanation: Magnifier software enlarges on-screen content for better visibility.