Chapter 6. Security, Privacy and Data Integrity Flashcards
What are input devices?
- Devices used to input data into a computer.
- Examples: Keyboard, mouse, scanner, microphone.
What are output devices?
- Devices used to output data from a computer to the user.
- Examples: Monitor, printer, speakers.
What is the purpose of a keyboard?
- An input device used to enter text and commands into a computer.
- Each key press sends a corresponding binary code to the computer.
How does an optical mouse work?
- Uses a light-emitting diode (LED) and a sensor to detect movement.
- Movement is translated into cursor movement on the screen.
What is the function of a scanner?
- An input device that converts physical documents into digital images.
- Can be used for document archiving and digital copying.
What are the characteristics of a touchscreen?
- Combines input and output functionality.
- Allows users to interact with the device by touching the screen.
What is the difference between an LCD and an LED monitor?
- 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.
What is the purpose of a printer?
- An output device that produces a physical copy of digital documents or images.
- Types include inkjet, laser, and 3D printers.
What are the differences between inkjet and laser printers?
- Inkjet printer: Uses liquid ink, suitable for high-quality images.
- Laser printer: Uses toner and laser technology, suitable for fast and high-volume printing.
What is a speaker’s function?
- An output device that converts digital audio signals into sound.
- Commonly used for multimedia applications.
What is a microphone used for?
- An input device that captures sound and converts it into a digital audio signal.
- Used for voice input, communication, and audio recording.
What is the purpose of a webcam?
- An input device that captures video for video conferencing, streaming, or recording.
- Often integrated into laptops and monitors.
How does a digital camera work?
- Captures images digitally using a sensor (CCD or CMOS).
- Stores images on memory cards for later transfer to a computer.
What is the function of a projector?
- An output device that displays visual content on a larger surface such as a screen or wall.
- Used in presentations, classrooms, and home theaters.
What are the benefits of using a solid-state drive (SSD) as an input/output device?
- Faster data access speeds compared to HDDs.
- More durable, less prone to mechanical failure.
What is the difference between a hard disk drive (HDD) and a solid-state drive (SSD)?
- HDD: Uses spinning disks and magnetic storage, slower but cheaper.
- SSD: Uses flash memory, faster but more expensive.
What is the function of an interactive whiteboard?
- Combines a whiteboard with digital display capabilities.
- Allows users to interact with the content using a pen or touch.
What are the uses of biometric devices?
- Input devices that authenticate users based on physical characteristics.
- Examples: Fingerprint scanners, facial recognition systems.
What is a plotter?
- An output device used for printing vector graphics.
- Commonly used for engineering drawings and large-scale graphics.
How does a barcode reader work?
- An input device that scans and interprets barcodes.
- Converts the barcode into a digital signal for processing.
