Chapter 6. Security, Privacy and Data Integrity

Question 1

What are input devices?

Answer 1

• Devices used to input data into a computer.
• Examples: Keyboard, mouse, scanner, microphone.

Question 2

What are output devices?

Answer 2

• Devices used to output data from a computer to the user.
• Examples: Monitor, printer, speakers.

Question 3

What is the purpose of a keyboard?

Answer 3

• An input device used to enter text and commands into a computer.
• Each key press sends a corresponding binary code to the computer.

Question 4

How does an optical mouse work?

Answer 4

• Uses a light-emitting diode (LED) and a sensor to detect movement.
• Movement is translated into cursor movement on the screen.

Question 5

What is the function of a scanner?

Answer 5

• An input device that converts physical documents into digital images.
• Can be used for document archiving and digital copying.

Question 6

What are the characteristics of a touchscreen?

Answer 6

• Combines input and output functionality.
• Allows users to interact with the device by touching the screen.

Question 7

What is the difference between an LCD and an LED monitor?

Answer 7

• LCD (Liquid Crystal Display): Uses liquid crystals and a backlight.
• LED (Light Emitting Diode): A type of LCD that uses LED backlighting for better contrast and energy efficiency.

Question 8

What is the purpose of a printer?

Answer 8

• An output device that produces a physical copy of digital documents or images.
• Types include inkjet, laser, and 3D printers.

Question 9

What are the differences between inkjet and laser printers?

Answer 9

• Inkjet printer: Uses liquid ink, suitable for high-quality images.
• Laser printer: Uses toner and laser technology, suitable for fast and high-volume printing.

Question 10

What is a speaker’s function?

Answer 10

• An output device that converts digital audio signals into sound.
• Commonly used for multimedia applications.

Question 11

What is a microphone used for?

Answer 11

• An input device that captures sound and converts it into a digital audio signal.
• Used for voice input, communication, and audio recording.

Question 12

What is the purpose of a webcam?

Answer 12

• An input device that captures video for video conferencing, streaming, or recording.
• Often integrated into laptops and monitors.

Question 13

How does a digital camera work?

Answer 13

• Captures images digitally using a sensor (CCD or CMOS).
• Stores images on memory cards for later transfer to a computer.

Question 14

What is the function of a projector?

Answer 14

• An output device that displays visual content on a larger surface such as a screen or wall.
• Used in presentations, classrooms, and home theaters.

Question 15

What are the benefits of using a solid-state drive (SSD) as an input/output device?

Answer 15

• Faster data access speeds compared to HDDs.
• More durable, less prone to mechanical failure.

Question 16

What is the difference between a hard disk drive (HDD) and a solid-state drive (SSD)?

Answer 16

• HDD: Uses spinning disks and magnetic storage, slower but cheaper.
• SSD: Uses flash memory, faster but more expensive.

Question 17

What is the function of an interactive whiteboard?

Answer 17

• Combines a whiteboard with digital display capabilities.
• Allows users to interact with the content using a pen or touch.

Question 18

What are the uses of biometric devices?

Answer 18

• Input devices that authenticate users based on physical characteristics.
• Examples: Fingerprint scanners, facial recognition systems.

Question 19

What is a plotter?

Answer 19

• An output device used for printing vector graphics.
• Commonly used for engineering drawings and large-scale graphics.

Question 20

How does a barcode reader work?

Answer 20

• An input device that scans and interprets barcodes.
• Converts the barcode into a digital signal for processing.