mobileDevices_Chapter 2. Laptops, Part 2-Cram quiz Flashcards
Which kind of video technology do most laptop LCDs use? A. TFT Active Matrix B. Passive Matrix C. OLED D. MAC ID
A. TFT active-matrix displays are the most
common in laptops that use LCDs. Passive-matrix
screens have been discontinued, but you might
see an older laptop that utilizes this technology.
OLED technology is a newer and different
technology that is not based on TFT displays, but
instead uses emissive display technology, meaning
that each dot on the screen is illuminated by a
separate diode. OLED displays can however be
passive-matrix or active-matrix controlled. The
MAC ID is the hexadecimal address associated
with a network adapter, such as a Wi-Fi adapter
or network card.
Which of the following uses an organic compound that emits light? A. TFT Active Matrix B. IPS C. OLED D. LCD E. LED
C. OLED (organic light emitting diode) displays
use an organic compound or film that emits light.
TFT active-matrix implies LCD, and neither of
them use organic compounds the way OLED does.
In-plane switching (IPS) is a type of LCD
technology that increases the available viewing
angle compared to older technologies such as
twisted nematic (TN) matrix LCDs. However, IPS
is generally considered inferior to OLED screens
when it comes to brightness and contrast ratio
when viewed from an angle. LED screens use a
film and diodes, but not organically in the way
that OLED does, and not at such a small size.
Which of the following are two possible reasons
why a laptop’s LCD suddenly went blank with no
user intervention? (Select the two best answers.)
A. Damaged inverter
B. Damaged LCD
C. Burned-out backlight
D. Incorrect resolution setting
A and C.
A damaged inverter or burned-out bulb
could cause a laptop’s display to go blank. You can
verify whether the LCD is still getting a signal by
shining a flashlight at the screen. A damaged LCD
usually works to a certain extent and will either be
cracked, have areas of Windows missing, or show
other signs of damage. An incorrect resolution
setting can indeed make the screen suddenly go
blank (or look garbled), but that scenario will
most likely occur only if the user has changed the
resolution setting—the answer specifies with no
user intervention.
Which of the following allows us to access a WLAN? A. LED B. Webcam C. Digitizer D. Stylus E. Wi-Fi card
E.
A Wi-Fi card, also known as a Wi-Fi network
adapter, allows us to connect to a WLAN (wireless
local area network) which is essentially another
name for a Wi-Fi network. LED is a type of
display. A webcam is used to communicate
visually and audibly with others, or to record
oneself. A digitizer is the device that converts
tapped or written impulses on a screen into digital
information that the operating system can use. A
stylus is a writing device used with a digitizer or
touchscreen.
Which of the following keys should you press to enable a secondary display on a laptop? (Select the two best answers.) A. Fn key B. Caps lock key C. Num Lock key D. Special function key E. Insert key
A and D.
To enable a secondary, or external,
display on a laptop you would use the Fn key
(called the function key) and a special function
key, for example F3 or F4, whichever one that
corresponds to screen switching. It’s this
combination of keys that allows you to make use
of displays plugged into HDMI or other ports on
the laptop. The caps lock key enables a user to
type in all uppercase letters. The number lock key
(if available) turns on the numeric keypad (if the
laptop has one). The insert key is often used by
programs such as word processors in one of two
modes: overtype; where anything that is typed is
written over any existing text; and insert mode,
where typed characters force the existing text
over.
When a user types, a laptop’s screen displays
letters and numbers instead of only letters. What
should you check first?
A. Fn key
B. LCD cutoff switch
C. Num Lock key
D. Scroll Lock key
C. The Number Lock key (Num Lock)
can enable
or disable the numeric keypad. This might be
necessary if the user inadvertently turned it on or
disconnected an external keyboard from the
laptop. Some laptops require you to press
Ctrl+Num Lock to enable or disable the
numeric keypad. Laptops are usually color-coded
(for example, white options might require the Ctrl
key and blue options might require the Fn key). In
this scenario, pressing the Function (Fn) key is
not necessary when pressing the Num Lock key.
The LCD cutoff switch is used to turn off the bulb
that lights the LCD. The Scroll Lock key is not
often used but it is meant to lock any scrolling
done with the arrow keys.
You are required to install an anti-theft solution for a customer’s laptop. Which of the following should you perform? A. Install a docking station B. Install a cable lock C. Install Windows D. Configure a password in the BIOS/UEFI E. Use a port replicator
B. Install a cable lock
to increase the security of a
laptop and decrease the chances of theft. Docking
stations and port replicators offer increased
functionality for a laptop but do not increase
security; the laptop can be easily disconnected
from them. Installing Windows is not an anti-theft
solution, nor any type of security precaution.
Configuring a password in the BIOS/UEFI is a
good security practice, but it will not help avoid
theft. However, if the laptop is stolen, a user
password (and administrator password) that is
configured in the BIOS can help prevent a person
from accessing what is on the laptop.
You are helping a project manager with a
presentation using a laptop which feeds video to a
projector. During your tests, the projector’s image
begins to flicker. The laptop’s display does not
have any problems. You attempt to change the
resolution on the laptop, but the issue continues.
Which of the following should you do next?
A. Change the projector settings.
B. Check the connectivity of the video cable.
C. Change the aspect ratio of the laptop.
D. Check the connectivity of the power cable.
B. Check the connectivity of the cable.
If it is
flickering, chances are that the cable is loose, or
the cable’s quality is lacking. Screen flicker is
more common with VGA cables, but it can happen
with just about any connection. Remember,
always check the basic stuff first: connectivity,
power, and so on. It is unlikely that the projector
settings will make a difference based on this
particular problem. You cannot change the aspect
ratio by itself on most laptops, however, when you
change the resolution (which was already done in
the question) you might be changing the aspect
ratio as well, depending on the resolution
selected. If the power cable was loose or damaged,
it would probably result in more than just screen
flicker; the projector might power off and power
back on, which would prevent the image from
being displayed for at least several seconds while
the projector powers back up. Great job so far!
Two chapters down!
