COMPTIA A+ 220-1101 CORE 1 –
MOBILE DEVICES (DOMAIN 1)
COMPLETE STUDY GUIDE &
PRACTICE QUESTIONS WITH
CORRECT ANSWERS GRADE A+
(2026)
LCD Display - answer-When light shines through liquid crystals, providing a lightweight,
low power, and inexpensive display. Difficult to replace.
Twisted Nematic (TN) LCD - answer-Original LCD technology with fast response times
(good for gaming!) that may have poor viewing angles due to color shifts.
In Plane Switching (IPS) LCD - answer-Excellent color representation, at a higher cost
than the TN LCD.
Vertical Alignment (VA) LCD - answer-A good compromise between the TN and IPS
LCDs, with good color representation, and a slightly slower response time than TN.
Organic Light Emitting Diode (OLED) - answer-Organic compound that emits light when
receiving an electrical current. They're lightweight and use no backlight, making them
great for tablets, phones, and smart watches.
Cold Cathode Fluorescent Lamp (CCFL) - answer-Generally used in older laptops, this
type of backlighting requires a higher voltage and power to run and is thicker than its
counterpart.
LED-backlit LCD display - answer-Backlights are LEDs instead of the original florescent
design, with LEDs around the edge of the screen in an array. These are the most
common displays for the latest laptops.
, Backlight - answer-What florescent lamps/LED to display to your eyes.
Inverters - answer-Turn DC into AC power.
Digitizer - answer-Converts touch such as a stylus or touch into actual input for the
device to use.
Wi-Fi antennas - answer-These cords consist of WiFI main and Aux cords, as well as
Bluetooth, wrapping around the laptop screen (as to be up high for a good signal)
Webcam - answer-This device captures video and has a built-in camera and
microphone, and has specialized drives and software.
Microphone - answer-This device is typically built-in to the laptop display, useful for
video calls, but not great for non-casual use, as you can get better quality from a
standalone microphone.
Lithium-Ion Battery - answer-A battery with no memory effect. Charging the battery
diminishes the capacity slightly
Laptop Keyboard - answer-A few screws and a single ribbon cable connect this item to
the motherboard of a laptop.
Laptop Keycaps - answer-These are very delicate pieces of a laptop's keyboard and
must be handled with care and the instructions provided by the manufacturer
Connection for Mobile Devices - answer-Able to be done with tablets, phones,
wirelessly or wired with standards and options changing through the years. This is for
**Synchronization, connectivity, backup, and identification**.
MOBILE DEVICES (DOMAIN 1)
COMPLETE STUDY GUIDE &
PRACTICE QUESTIONS WITH
CORRECT ANSWERS GRADE A+
(2026)
LCD Display - answer-When light shines through liquid crystals, providing a lightweight,
low power, and inexpensive display. Difficult to replace.
Twisted Nematic (TN) LCD - answer-Original LCD technology with fast response times
(good for gaming!) that may have poor viewing angles due to color shifts.
In Plane Switching (IPS) LCD - answer-Excellent color representation, at a higher cost
than the TN LCD.
Vertical Alignment (VA) LCD - answer-A good compromise between the TN and IPS
LCDs, with good color representation, and a slightly slower response time than TN.
Organic Light Emitting Diode (OLED) - answer-Organic compound that emits light when
receiving an electrical current. They're lightweight and use no backlight, making them
great for tablets, phones, and smart watches.
Cold Cathode Fluorescent Lamp (CCFL) - answer-Generally used in older laptops, this
type of backlighting requires a higher voltage and power to run and is thicker than its
counterpart.
LED-backlit LCD display - answer-Backlights are LEDs instead of the original florescent
design, with LEDs around the edge of the screen in an array. These are the most
common displays for the latest laptops.
, Backlight - answer-What florescent lamps/LED to display to your eyes.
Inverters - answer-Turn DC into AC power.
Digitizer - answer-Converts touch such as a stylus or touch into actual input for the
device to use.
Wi-Fi antennas - answer-These cords consist of WiFI main and Aux cords, as well as
Bluetooth, wrapping around the laptop screen (as to be up high for a good signal)
Webcam - answer-This device captures video and has a built-in camera and
microphone, and has specialized drives and software.
Microphone - answer-This device is typically built-in to the laptop display, useful for
video calls, but not great for non-casual use, as you can get better quality from a
standalone microphone.
Lithium-Ion Battery - answer-A battery with no memory effect. Charging the battery
diminishes the capacity slightly
Laptop Keyboard - answer-A few screws and a single ribbon cable connect this item to
the motherboard of a laptop.
Laptop Keycaps - answer-These are very delicate pieces of a laptop's keyboard and
must be handled with care and the instructions provided by the manufacturer
Connection for Mobile Devices - answer-Able to be done with tablets, phones,
wirelessly or wired with standards and options changing through the years. This is for
**Synchronization, connectivity, backup, and identification**.
