IT 105 Final GMU Questions with 100% Correct Answers
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Course
IT 105
Institution
IT 105
Expansion Ports Ports in the system unit of digital devices used for connecting cables and various add-ons to expand the options for input , output, and storage
Local Bus Carries data at high speeds between the processor and RAM
Expansion Bus Carries data between RAM and external devices that are...
IT 105 Final GMU Questions with 100% Correct Answers Expansion Ports ✅Ports in the system unit of digital devices used for connecting cables and various add -ons to expand the options for input , output, and storage Local Bus ✅Carries data at high speeds between the processor and RAM Expansion Bus ✅Carries data between RAM and external devices that are connected to ports on the system unit Hot-Plugging ✅When a peripheral device is connected or disconnected while the host device is operating Bluetooth ✅A common wireless technology for connecting peripherals What makes Bluetooth good for mobile devices? ✅It low -power so it is ideal for mobile devices that don't have big batteries Bluetooth's Range: ✅30 feet Bluetooth's Transfer Speed: ✅Slow compared to wired connections (~3Mbps) USB 2.0 Transfer Speed: ✅~480 Mbps FireWire Transfer Speed: ✅~800 Mbps USB 3.0 Transfer Speed: ✅~5Gbps Thunderbolt Transfer Speed: ✅~10 Gbps Device Driver ✅Software that helps a peripheral device establish communication with its host device Computer Display ✅A device that simply displays text and images A computer display is classified as a(n): ✅Output device Touchscreens are classified as ✅Both input and output devices Display devices can be ✅Standalone display devices, sometimes called monitors, are popular for desktop computers. OR Built-in display devices for laptops, tablets, and handheld devices, but these devices may also accept a standalone display device LCD(Liquid Crystal Display) Technology: ✅Technology that produces an image by filtering light from a backlight through a layer of liquid crystal cells(One Red, One Blue, and One Green crystal) LED(Light -Emitting Diode) Technology: ✅Uses LEDs as the video display. This technology is replacing CCFL backlighting technology Advantages of LCD Screens: ✅-Display Clarity -Low Radiation Emission -Portability -Compactness What is the source of backlighting in a LCD screen? ✅Cold Cathode Florescent Lamp (CCFL) The liquid crystal cells used in display devices do not directly emit light, so ____ is necessary. ✅Backlighting Factors that affect image quality: ✅Screen size, response rate, dot pitch, and screen resolution Screen Size ✅The measurement in inches from one corner of the screen diagonally across to the opposite corner Response Rate ✅The time it takes for one pixel to change from black to white then back to black Display devices with fast response rates display a crisp image with minimal ______? ✅Blurring or "ghosting" of moving objects What is Response Rate measured in? ✅Milliseconds For gaming systems, a response rate of ____ or less is desirable. ✅5ms Dot Pitch (dp) ✅The LED's that form an image on the screen are spaced in a grid; dp is the distance in millimeters between like -colored LEDs What is Dot Pitch measured in ✅Millimeters Screen Resolution ✅The number of horizontal and vertical pixels that a device displays on the screen. What is an alternate way of expressing resolution? ✅Pixels per inch (ppi) Examples of Touchscreen Technology ✅-Tablets -Handheld devices -Retail Store Self -Checkout devices -ATMs Touchscreen Gestures: ✅Tap, drag, pinch Types of Touchscreen Technology ✅Resistive and Capacitive Resistive Touchscreens ✅Contain a base panel and a flexible top layer separated by a small space. Pressing slightly on the top layer brings it into contact with the base layer, and the point of contact is collected and passed to the processor Resistive technology is susceptible/not susceptible to: ✅Susceptible: Sharp Objects Not Susceptible: Dust or Water Capacitive Touchscreens: ✅Contains a transparent panel coated with a thin layer of electrically conductive material. Because the human body is an electrical conductor, touching the screen produces a change in the electrical current. A special capacitive stylus or touchscreen gloves can also be used to operate this type of screen. Capacitive Screens can interpret: ✅A single touch or more complex inputs such as handwriting. How does one input text when no physical keyboard is available? ✅Virtual Keyboard Graphic Hardware Required for Display Devices: ✅Integrated Graphics and Dedicated Graphics Integrated Graphics ✅Built into a computer's system board Dedicated Graphics ✅Mounted on a small circuit board called graphics card (or video card) A graphics card contains what two key elements? ✅Graphics Processing Unit (GPU) and special video memory Video Memory ✅Stores screen images as they are processed but before they are displayed Difference between Integrated Graphics and Dedicated Graphics ✅Integrated Graphics have image data processed by the main CPU, then sent to the graphics circuits that stream the image to the display device. Dedicated Graphics have image data processed by the GPU, freeing the CPU for other tasks. Types of Printer Technology: ✅Ink Jet or Laser Multi -function Printers can also serve as: ✅-Scanners -Copiers -Fax Machines How does an Inkjet Printer work? ✅It has a nozzle -like print head that sprays ink onto paper to form characters and graphics Why are ink jet printers the most popular types of printers? ✅They are inexpensive and produce both color and black -and-white printouts. They work well for most home and small business applications. Ink jet technology also powers many photo printers, which are optimized to print high -quality images produced by digita l cameras and scanners. Laser Printer Technology: ✅Uses the same technology as a photocopier Advantage to Laser Printers over Ink Jet: ✅Laser Printers are faster Laser Printers are more expensive than Ink Jet because: ✅It is more complex than Ink Jet Technology Main Application for Laser Printers: ✅Business - to print in large volumes Types of Laser Printers: ✅Basic - Black and White Color - more costly Internet of Things (IoT) ✅A network of IoT devices that are connected to Internet and output the data that is captured by their sensors such as the temperature sensor inside your home thermometer, or the GPS sensor in your smart phone device. In other words, All types of "things" equipped with smart sensors can monitor our homes, cars, and workplaces. They can also monitor our habits and physical fitness and communicate with each other while doing so
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