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CompTIA 220-1101 > The Display Components of Mobile Devices > Flashcards

The Display Components of Mobile Devices Flashcards

1.2 Compare and contrast the display components of mobile devices.

1
Q 
Your manager tells you to replace the inverter on a broken laptop. Where will you find this component?
A. Underneath the keyboard
B. In the display
C. Next to the heat sink and fan
D. Near the CPU
A

B. In the display

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2
Q

What is an inverter?

A

The inverter is a small circuit board installed behind the LCD panel that takes DC current and inverts it to AC for the backlight.

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3
Q 
You need to replace an LCD on a defective laptop. Which of the following are components of an LCD? (Choose all that apply.)
A. Inverter
B. Screen
C. Wi-Fi card
D. Backdrop
A

A,B; The inverter and screen are components of an LCD.

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4
Q 
A user complains that their mouse cursor randomly jumps to different places on the screen when they type. Which device might you want to disable to prevent this from happening?
A. Touchpad
B. Mouse
C. Point stick
D. Trackball
A

A. Touchpad; most touchpads today have settings to allow you to control the sensitivity, and they will also differentiate between a palm touching them and a finger. In addition, if you have a sensitive touchpad that is giving you trouble, you can disable it altogether.

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5
Q 
One of the users on your network needs to travel and wants to work on the airplane. Which laptop accessory will allow them to power their laptop from the airplane?
A. AC adapter
B. DC adapter
C. Battery converter
D. Airplane mode
A

B. DC adapter;

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6
Q 
A user complains that their 2-in-1 laptop screen does not properly detect where they place
their finger on the screen. What should you do first to resolve the issue?
A. Replace the touch screen
B. Replace the touchpad
C. Recalibrate the touch screen
D. Recalibrate the touchpad
E. Degauss the touch screen
F. Degauss the touchpad
A

C. Recalibrate the touch screen;

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7
Q

Which of the following describes the job of an inverter in a laptop?
A. It changes the screen orientation when the laptop is rotated.
B. It converts AC power into DC power for the display backlight.
C. It converts DC power into AC power for the display backlight.
D. It allows the laptop display to function in tablet mode.

A

C. It converts DC power into AC power for the display backlight;

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8
Q 
You are purchasing a mobile device that allows you to use multi-finger gestures to interact with the device. What type of touchscreen technology does this device most likely use?
A. Capacitive
B. Infrared
C. SAW
D. Resistive
A

A. Capacitive

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9
Q

You’re upgrading the Wi-Fi card in a manager’s laptop and notice that the antenna cable is frayed, so you need to replace that too. What will you likely need to do to replace
the antenna?
A. Wrap the antenna with electrical tape.
B. Open the display to replace the cable.
C. Attach a dongle for the new cable.
D. Just install the new card because the antenna is part of the card.

A

B. Open the display to replace the cable.

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10
Q

You are investigating new laptops for your company. You want the laptop displays to have a
wide viewing angle. Which technology standard is best suited for your needs?
A. LED
B. SVA
C. IPS
D. TN

A

C. IPS; IPS has the best viewing angles and color reproduction of all LCD monitors. They usually have a bit more lag than TN monitors do, but the difference is minimal in higher-end models. IPS monitors are ideal for those seeking the best color experience, such as graphic designers and video artists. They are also the best choice for someone who wants to mount them vertically, like a lot of programmers do.

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11
Q 
Which type of LCD has the best contrast, meaning the darkest black and lightest white? 
A. TN
B. IPS
C. VA
D. OLED
A

D. OLED;

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12
Q 
Of the laptop LCD technologies, which consumes the least amount of power?
A. LED
B. IPS 
C. TN 
D. VA
A

A. LED;

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13
Q 
What type of display uses organic materials that themselves light up so that no backlight is needed, meaning true black and greater contrasts can be achieved?
A. QLED
B. Mini-LED 
C. LED
D. OLED
A

D. OLED;

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14
Q 
You have recently purchased a laptop computer with a touchscreen. It allows you to draw images on the screen and save them on the computer. Which device is responsible for converting the input into the image that you see and save?
A. Inverter
B. Touchpad 
C. Digitizer
D. Touchscreen
A

C. Digitizer;

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15
Q 
Tablet computers feature touchscreens that are approximately what size?
A. Between 5" and 7"
B. Between 3" and 5"
C. Between 7" and 12"
D. Between 12" and 24"
A

C. Between 7” and 12”

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16
Q 
Which of the following display types refers not to how the liquid crystals are arranged, but rather to the type of backlight being used?
A. LED 
B. OLED 
C. IPS
D. TN
A

A. LED

17
Q

How did IPS improve LCD displays compared to old LCD display types?

A

IPS improved the viewing angle and color reproduction.

18
Q

What are the main advantages and disadvantagesof using Twisted Nematic (TN) LCD display over other LCD technologies?

A

The main benefits are low cost, low power draws, faster response times and faster refresh rate.

The main disadvantages are the poor viewing angle and poor color reproduction.

19
Q

What is the purpose of the diffuser in the LCD display?

A

The diffuser spreads the light evenly across the display.

20
Q

Which component of an LCD display illuminates the display?

A

the backlight

21
Q

What does the initials OLED denote?

A

Organic light-emitting diode

22
Q

How are Vertical Alignment (VA) displays different than TN or IPS LCDs

A

A Vertical Alignment LCD finds a balance between IPS and TN by providing good response times, viewing angle performance, and color reproduction; in addition, to having the best contrast ratio among them all.

23
Q

What is the purpose of a digitizer within a touch-screen display?

A

Digitizers convert touch signals into data inputs that the device can recognize.

24
Q

Which two key combinations on a laptop should you use to also enable an external monitor with the laptop?

A

The function key and screen key

25
Q

What does an extended display do?

A

An extended display function increases the virtual desktop area to include all monitors connected to the computer.

26
Q

What is in-plane switching (IPS)?

A

IPS is a display technology that uses a layer of liquid crystals placed between two glass surfaces that have their molecules aligned parallel to those surfaces’ directions.

27
Q

What is the primary user interface used on mobile devices?

A

Touch

28
Q

With regards to display technology, what does the initials IPS denote?

A

In-plane switching

29
Q

What should you do after connecting a touch screen monitor to a computer?

A

Calibrate the monitor

30
Q

What does the initials LED denote?

A

Light Emitting Diode

CompTIA 220-1101 (12 decks)

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