IntroPC Ch 10. 1-3

10.2

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5.3

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Which of the following devices would you add to a computer if you needed to take inventory at a retail store by scanning the UPC symbols on products?

Bar code reader

Which of the following devices authenticates users based on their physical features?

Biometric scanner

You have purchased a 1600 x 1200 LCD monitor and connected it to the DVI-I port on your computer using a DVI-D cable. You configure the screen resolution at 1280 x 1024 with 24-bit color. The display output seems to be fuzzy and stretched. Which of the following BEST describes the action you should take to correct the problem?

Change the screen resolution to the native resolution of the monitor. LCD monitors have a native display resolution. The native display of this monitor is 1600 x 1200. While it is possible to set the resolution lower than the native display, you should use the native display setting for the clearest picture. Using a DVI-D cable is the same as using a DVI-I cable; both will give you digital output. Using a DVI-A cable could result in lower quality images, as you will be using an analog signal. Increasing the color depth increases the number of colors that the monitor displays.

A customer complains that a recently purchased monitor no longer displays a picture. You verify that the monitor is powered on and that the video cable is securely fastened to the video port. Which of the following actions is the BEST to take next?

Check the brightness and contrast settings using the monitor's controls. It's not uncommon for a monitor's brightness or contrast controls to be accidentally turned down. Check the brightness and contrast on the monitor to see if this has any effect on the problem. When troubleshooting, be sure to check the obvious things first before taking more serious actions, such as returning the monitor to the manufacturer. Moving the video card or reloading the video driver is unlikely to resolve the customer's problem in this scenario.

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?

Configure Jill's computer with dual monitors.

You have just installed a new video card in a user's Windows workstation. When the system is powered on, the screen displays in 16 colors at 640 x 480 resolution. Which of the following will BEST resolve this problem?

Download and install the latest driver from the video card manufacturer's website. You should download the latest video driver from the manufacturer's website. Because Windows didn't have the right driver, it used a generic VGA or SVGA driver instead. Rebooting in Safe Mode will result in a display using the basic VGA video driver. Verifying that the system's UEFI firmware is compatible with the video card will not solve the issue of displaying in 16 colors at 640 x 480 resolution. The sync rate is associated with the physical speed that a router (or modem) communicates.

Which of the following peripheral devices are designed specifically for playing games on a computer? (Select two.)

Gamepad Joystick

Which of the following projector issues would MOST likely be caused by poor air flow through dirty vents in the projector?

Intermittent shutdowns Intermittent shutdowns can happen when sensors are triggered. Poor air circulation from dirty vents could cause the temperature to rise and trigger the temperature sensor to shut down the projector. Fuzzy images on the display could be the result of improper resolution settings or problems with the LCD panels, not ventilation issues. A dim display could be the result of a bad inverter or a bulb that is wearing out, not a ventilation issue. The audio and video being out of sync would not be caused by a ventilation problem.

You have three computers in your office. You would like to reduce the time it takes to switch from one computer to the next, and you would like to use only one keyboard, one monitor, and one mouse for all three computers. Which of the following devices BEST allows this type of setup?

KVM

You are an IT professional that works with home users. One of your customers works from home and uses multiple Windows computers as well as an Apple Mac computer. Your customer wants to be able to switch between his computers without changing the keyboard and monitor currently in use. Which of the following devices would BEST facilitate sharing his monitor and other input devices with all of his computers?

KVM switch

Match each LCD type with the corresponding benefit or characteristic.

The least expensive, thinnest, and most widely used type of LCD. correct answer: WLED Able to dim specific regions of the screen. correct answer: Full-array WLED Superior accuracy (most expensive type of backlighting technology). correct answer: RGB-LED Produces better colors than WLED (consumes more energy). correct answer: CCFL 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.

Your projector is displaying the colors on the screen incorrectly. What is the MOST likely reason for this problem?

The source computer's resolution settings do not match the projector's resolution settings. When the source computer's resolution settings do not match the projector's resolution settings, it can cause incorrect colors to display. Outdated drivers often result in a projector failing to display anything at all. A triggered filter sensor would likely result in a shutdown. A VGA cable would not cause the wrong colors to be displayed.

The contrast on your projector's output is not displaying properly. In addition, the images continually flicker. What is the MOST likely cause of the projector's display problems?

A bulb is close to burning out. A bulb on the verge of burning out can cause a projector's screen contrast to display incorrectly and induce flickering. An incorrect cable would not be the source of contrast and flickering problems. An outdated projector driver could cause the projector to not display anything at all. However, it would not cause contrast or flickering problems. High-definition files that are not in sync with audio files would not cause contrast or flickering problems.

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 screen and a projector

You have purchased an LED monitor and connected it to the DVI-I port on your computer using a DVI-D cable. You configure the screen resolution to 1440 x 900 with 32-bit color. The display on the screen seems to be pixilated. Which of the following solutions is MOST likely to fix this problem?

Change the screen resolution to the native resolution of the monitor. LED and LCD monitors have a native display resolution. You should set the resolution of the video board to the native resolution of the monitor (whatever it might be). While it is possible to set a resolution other than the native resolution, the images on the display will be distorted or pixelated. DVI-D and DVI-I cables are compatible; both carry digital output to the monitor. DVI-A cables are incompatible with DVI-D or DVI-I hardware because they use an analog signal. Changing the color depth increases the number of colors that the monitor displays.

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?

DLP projector 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?

Duplicate these displays

Which of the following display technologies require backlighting? (Select two.)

LCD LED 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.

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?

LCD display with IPS panel. 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?

LCD display with TN panel. 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 is true of modern LCD monitors in regards to backlighting?

LEDs are used to backlight the screen. 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.

After using your LCD monitor for about three months, you notice a small black dot in one area of the screen. Regardless of what is shown on the monitor, the dot remains the same color and in the same location. Which of the following is the BEST method for removing the black dot from the monitor?

Play a video designed to fix dead pixels. When working with LCD monitors, a pixel that is stuck is in an On state and is shown on the monitor as a white dot. A black dot is a dead pixel that is stuck in an Off state. If the dead pixel is not permanently damaged, it can usually be fixed using any of the options mentioned (except buying a new monitor, which does not actually fix the problem). However, the BEST method is to run a video designed to fix dead pixels, which you can purchase or download online. Screen-fixing videos play a random combination of red, green, and blue hues at a rate of up to 60 flashes per second in an attempt to jar the stuck pixel back into its usual cycle. The other methods could void the warranty and cause additional dead spots. Buying a new monitor is a last resort, as it is the most expensive option.

Jamie has been tasked with designing a solution for the paralegals in his office. They need to review old documents that are on paper files and create word processor documents from them that can be searched and cross-referenced. Which of the following devices should Jamie use to create the solution? (Select two.)

Scanner Digitizer

You recently upgraded a client's older workstation to Windows 11. The client has called to complain that the interface is very slow. For example, after clicking on the Start button, the Start menu slowly appears on the screen. Which of the following will MOST likely fix this problem without requiring a hardware upgrade?

Set the visual effects for best performance. You should adjust the visual effects for best performance. This will disable animation, shading, and fading effects used by Windows. Doing so reduces the load on the older hardware in the client's system and should increase the user interface's performance. However, the best solution to this problem would be to install a newer video adapter in the system. Changing the resolution setting changes the size of text and windows in relation to the screen. Changing the color depth affects the number of colors that can be displayed at one time. Increasing the video acceleration settings increases the amount of processing done by the video card, not the CPU.

Which peripheral device is best for capturing a customer's signature when they check out at a convenience store or supermarket?

Signature pad

For several years, your laptop's monitor has worked perfectly. However, shortly after turning on your laptop today, you notice that the dimness has increased on the screen. Which of the following is the MOST likely cause? (Select two.)

The power adapter was accidently unplugged. The monitor's inverter has gone bad. A dim image on an LCD monitor is usually caused by a misconfigured brightness setting, an automatic power-saving mode, or a malfunctioning backlight. If your laptop suddenly dims, first check to verify that the power adapter hasn't been accidently disconnected. Most laptops automatically dim the screen brightness when they run low on battery to minimize power usage. Since you know that you haven't changed the brightness settings, it is very unlikely that these settings would be changed automatically. Therefore, the dimness could be caused by a failed compact fluorescent light (CLF) or inverter. These two items provide the backlight for LCD monitors. If you're tech-savvy, you may be able to replace the bad component yourself. Otherwise, you will need to get a professional to fix or replace the monitor.

What are the disadvantages of plasma display technology? (Select two.)

They generate much more heat than other display types. The gasses inside the cells are sensitive to air pressure fluctuations. 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.

What type of peripheral device is typically found on a laptop computer and allows the user to control the cursor with a finger?

Touch pad

Which of the following is considered a computer input device?

Touchscreen

Match the peripheral devices on the left with the descriptions or examples on the right. Each peripheral device may be used once, more than once, or not at all.

Used to scan hardware that contains an embedded microchip for authentication. correct answer: Smart card reader Used to capture some type of analog signal and convert it into digital data. correct answer: Digitizer Can be a stand-alone device or integrated with other peripherals, such as a keyboard. correct answer: Smart card reader Used to scan users' unique physical features and use them to verify their identity. correct answer: Biometric scanner Graphics tablets mostly used by graphic artists to capture hand-drawn images. correct answer: Digitizer Fingerprint scanner. correct answer: Biometric scanner Most commonly used in retail environments at checkout stands. correct answer: Barcode reader