10.2.7 Practice questions
Ida, one of the employees in the sales department, needs a way to display her PowerPoint sales presentation to a large group of potential customers. She has asked you to set up the conference room in preparation for her presentation. You will need to purchase a display system for the conference room. Which of the following display systems would be the BEST to purchase? A large OLED monitor A large screen and a projector A large LCD monitor A large plasma monitor
A large screen and a projector Explanation Since Ida is presenting to a large group, most monitors would be too small to view from the back of a room. Using a projector and screen will provide the best view of her presentation.
You work as the IT administrator for a small news station. Jill, an employee in Building 2, works in the audio-video editing department and would like to increase her productivity. For example, she would like to be able to run multiple programs simultaneously and be able to compare video clips side by side. Which of the following configuration changes would provide the BEST solution for Jill? Provide Jill with a second computer. Configure Jill's computer with a higher resolution. Configure Jill's computer with dual monitors. Grant Jill access to a remote workstation.
Configure Jill's computer with dual monitors. Explanation Dual monitors have been proven to increase productivity by 20 to 30 percent. Providing Jill with a second monitor would allow her to easily compare her video clips side by side by placing different clips on each monitor. Adding a second computer would be very expensive and would make Jill's work more difficult because of the challenges of working on separate computers. Giving Jill access to a remote workstation would still require a dedicated workstation, which would be expensive, and could possibly result in connectivity issues from time to time. Configuring Jill's computer with a higher resolution may help if it is available, but she would still be limited in the amount of space she has to view and work with her files.
You are in charge of putting together the display design for a new conference center at your organization. The conference center will be in a large auditorium with 500 or more seats. Which of the following technologies will provide a large display for such a group and also provide very high resolutions? LCD projector LCD display panel DLP projector OLED display panel
DLP projecter Explanation The DLP projector, while more expensive than other projector solutions, provides the best experience for large groups. Although purchasing a very large LCD or OLED display might work, the cost would be prohibitive as you would need an extremely large display panel to provide a decent experience for all 500 or more seats. A DLP projector, however, can work with any large projector screen.
You are a trainer for your company and often teach courses in a classroom located on campus or in a hotel conference room. In your office, which is separate from the classroom, you have two external monitors connected to your laptop, and you are able to display different content on each monitor. However, when teaching, you only have your laptop and a projection unit. To make teaching easier, you want the same content to show on both the laptop monitor and the projection screen. Which of the following multiple display options would be BEST to select when you are teaching? Answer Show only on 1 Show only on 2 Duplicate these displays Extend these displays
Duplicate these displays Explanation To display the same content on your laptop monitor and the projection screen, you would need to use the Duplicate these displays option. The Extend these displays option allows you to have different content on the laptop monitor than that shown on the projection screen. The Show only on 1 and Show only on 2 options would limit the output to either the laptop monitor (1) or the projection screen (2), but not both.
You are putting together a system for a graphic artist and need to make sure that you find a display that meets their needs. The display needs to have very good color reproduction quality and viewing angles. The display also needs to have proper cooling and be power-efficient. Which of the following display types will MOST likely meet these needs? Plasma display with no motion blur. LCD display with TN panel. LCD display with IPS panel. OLED display with wide-angle viewing.
LCD display with IPS panel. Explanation LCD displays with IPS panels have the best color reproduction quality and viewing angles among LCDs. TN panels have imperfect color reproduction due to the fact that only 6 bits per color can be displayed. LCDs with IPS panels use far less power and run much cooler than plasma displays. They are more expensive than LCDs with TN panels, but are still more affordable than OLED displays.
You are putting together a gaming system and need to make sure that you find a display that meets your needs. The display needs to have a very good response time, and you would prefer that it be affordable and power-efficient. Which of the following display types will MOST likely meet these needs? Plasma display with no motion blur. OLED display with wide-angle viewing. LCD display with TN panel. LCD display with IPS panel.
LCD display with TN panel. Explanation LCD displays with TN panels are the most common technology used by LCDs. TN panels have very good response times (1 to 5 ms) and refresh rates (60 to 144 Hz), so they are great for PC gaming. They are more affordable and have faster response times than LCDs with IPS panels, use far less power than a plasma display, and are far more affordable than OLED displays.
Which of the following display technologies require backlighting? (Select two.) OLED Plasma DMD LED LCD
LED Correct Answer: LCD Explanation Edge-lit white LED (EL-WLED or WLED) displays use white LEDs along one edge (usually the top) of the LCD and a light diffuser to backlight the screen. Modern LCDs use an array of LEDs (light-emitting diodes) to backlight the screen. OLED monitors and plasma monitors do not require a backlight. Plasma displays use millions of small cells that contain electrically charged ionized gasses. The cells light up when electrically charged and do not need any backlighting. A DMD is a small chip that contains millions of tiny mirrors that can redirect light inside of DLP projectors.
Which of the following is true of modern LCD monitors in regards to backlighting? Red, green, and blue light provides the least expensive type of backlighting technology. LCD monitors have small cells containing electrically charged ionized gas that do not need backlighting. Cold cathode florescent (CCFL) is used for backlighting. LEDs are used to backlight the screen.
LEDs are used to backlight the screen. Explanation Modern LCDs use LEDs (light-emitting diodes) to backlight the screen. Older LCD monitors use cold cathode fluorescent lamps (CCFLs) for backlighting. Plasma displays use millions of small cells that contain electrically charged ionized gases that do not need backlighting. RGB-LED displays are available on modern LCD displays. They have an array of special LEDs that are able to emit red, green, and blue light, resulting in superior color accuracy. They are the most expensive type of backlighting technology.
Match each LCD type with the corresponding benefit or characteristic. Drag WLED Full-array WLED RGB-LED CCFL Drop The least expensive, thinnest, and most widely used type of LCD. Able to dim specific regions of the screen. Superior accuracy (most expensive type of backlighting technology). Produces better colors than WLED (consumes more energy).
Match each LCD type with the corresponding benefit or characteristic. The least expensive, thinnest, and most widely used type of LCD. WLED correct answer: Able to dim specific regions of the screen. Full-array WLED correct answer: Superior accuracy (most expensive type of backlighting technology). RGB-LED correct answer: Produces better colors than WLED (consumes more energy). CCFL correct answer: Explanation Edge-lit white LED (EL-WLED or WLED) displays use white LEDs along one edge (usually the top) of the LCD and a light diffuser to backlight the screen. EL-WLED LCDs are the least expensive, thinnest, and most widely used type of LCD. Full-array WLED displays have an array of white LEDs behind the screen. Full-array WLED LCDs are able to dim specific regions of the screen, resulting in a much higher contrast ratio than LCDs that use EL-WLED technology. RGB-LED displays have an array of special LEDs that are able to emit red, green, and blue light, resulting in superior color accuracy. RGB-LED displays are the most expensive type of backlighting technology. Older LCD monitors and some LCD HDTVs use cold cathode fluorescent lamps (CCFLs) for backlighting. CCFLs are able to produce better colors than EL-WLED and full-array WLED technologies, but consume a lot more energy and require an internal inverter.
What are the disadvantages of plasma display technology? (Select two.) They have low contrast and cannot produce true black. They generate much more heat than other display types. They consume less power than LCDs. The gasses inside the cells are sensitive to air pressure fluctuations. They usually display colors less accurately than LCD displays.
They generate much more heat than other display types. The gasses inside the cells are sensitive to air pressure fluctuations. Explanation Plasma displays generate much more heat than other display types, and the gasses inside the cells are sensitive to air pressure fluctuations. Plasma displays do have several advantages, including the fact that: Plasma displays usually show colors more accurately than LCD displays. Because no backlighting is used, plasma displays have high contrast and can produce true black (displays that use backlighting can only display very dark grey). Plasma displays have almost no motion blur due to the speed of the gas reaction and the way they draw frames. Because of this, most plasma displays do not specify response times. Plasma displays have several other disadvantages, including the fact that: Plasma displays consume two to three times as much power as LCDs. Plasma displays suffer from a problem known as image retention (IR). Static images that are displayed for a long time cause the phosphors to overheat, which creates a temporary shadow of the image that is visible even when the display is turned off. If the static image is displayed for too long, screen burn-in can occur, and the shadow image will be permanent.
