CompTIA A+ Core 1 (220-1101) Exam Cram
Summary Notes 2026!! Actual
Domain 1: Mobile Devices
Which laptop component is responsible for converting physical finger touches into digital input signals?
A) Inverter
B) Digitizer
C) Polarizer
D) EMR
ANSWER: B
Rationale: A is incorrect as it powers the backlight. B is correct as it translates touch into input. C is
incorrect as it filters light for the display. D is incorrect as it is a technology for stylus input.
A field technician needs a mobile device that can withstand drops, dust, and water. Which feature is
MOST important?
A) High-resolution OLED screen
B) Ruggedized casing
C) Digitizer stylus support
D) Thunderbolt 4 ports
ANSWER: B
Rationale: A is fragile and not ideal for harsh environments. B is correct as it provides physical protection
against environmental hazards. C is a nice-to-have but not essential for durability. D is irrelevant to
physical protection.
Which device allows a laptop to connect to multiple peripherals and charge simultaneously via a single
cable?
A) Port replicator
B) Docking station
C) KVM switch
D) Mini-PC
ANSWER: B
,Rationale: A is a basic version that only mirrors existing ports. B is correct as it provides full connectivity,
power delivery, and often extra expansion slots. C is incorrect as it switches inputs between multiple
computers. D is a standalone computer.
Which mobile device configuration is BEST for a corporate executive who travels frequently?
A) Thick bezel, heavy battery, HDD
B) 2-in-1 convertible, lightweight, LTE connectivity
C) Rugged tablet, barcode scanner
D) Desktop replacement, high-end GPU
ANSWER: B
Rationale: A is too heavy and slow for travel. B is correct as it offers portability, versatility, and constant
internet access. C is for inventory/field work. D is too bulky for frequent travel.
What is the primary advantage of an OLED display over an LCD display?
A) Lower cost
B) True blacks and infinite contrast ratio
C) Higher refresh rates only
D) Better outdoor visibility in direct sunlight
ANSWER: B
Rationale: A is incorrect as OLEDs are more expensive. B is correct because OLED pixels turn off
completely to produce true black. C is incorrect as LCDs can also have high refresh rates. D is incorrect as
OLEDs can struggle in direct sunlight compared to high-nit LCDs.
Which wireless technology is commonly used for contactless mobile payments?
A) Bluetooth
B) Wi-Fi
C) NFC
D) IR
ANSWER: C
Rationale: A is for longer-range peripheral connections. B is for local area networking. C is correct as
Near Field Communication is designed for short-range, secure transactions. D is for line-of-sight remote
controls.
A user's smartphone battery is swelling and pushing the screen out. What is the FIRST step?
A) Continue using it until it dies
,B) Place it in a freezer
C) Power it off and handle with care
D) Pierce the battery to release gas
ANSWER: C
Rationale: A is dangerous and can cause a fire. B is ineffective and can cause condensation damage. C is
correct to prevent thermal runaway or explosion. D is extremely dangerous and will cause a fire.
Which laptop feature allows the screen to be used in bright sunlight by reducing reflections?
A) Privacy filter
B) Anti-glare coating
C) Digitizer
D) OLED panel
ANSWER: B
Rationale: A restricts viewing angles to prevent shoulder surfing. B is correct as it diffuses light to reduce
reflections. C is for touch input. D is a display technology, not an anti-glare feature.
What is the purpose of a privacy filter on a laptop screen?
A) Increase screen brightness
B) Prevent shoulder surfing
C) Reduce blue light emission
D) Protect the screen from scratches
ANSWER: B
Rationale: A is incorrect; it actually reduces brightness. B is correct as it narrows the viewing angle so
only the user can see the screen. C is a software or hardware feature, not a filter's primary purpose. D is
the purpose of a screen protector.
Which mobile device is BEST suited for a warehouse worker who needs to scan barcodes?
A) Smartphone with a camera app
B) Rugged tablet with an integrated laser scanner
C) 2-in-1 convertible laptop
D) E-reader
ANSWER: B
, Rationale: A is slow and unreliable in poor lighting. B is correct as it is durable and has a dedicated, fast
hardware scanner. C is too fragile and bulky. D cannot scan barcodes.
Which connector type is reversible and supports high-speed data, video, and power delivery?
A) Micro-USB
B) Lightning
C) USB-C
D) Mini-USB
ANSWER: C
Rationale: A is not reversible and has low power limits. B is reversible but proprietary to Apple and lacks
universal video support. C is correct as it is the universal standard for reversible data, video, and power.
D is an older, non-reversible standard.
What does the term "form factor" refer to in mobile devices?
A) The operating system version
B) The physical size, shape, and layout
C) The battery capacity
D) The processor speed
ANSWER: B
Rationale: A is software. B is correct as it defines the physical dimensions and design (e.g., slate,
convertible, rugged). C is a hardware specification. D is a performance specification.
Which protocol is primarily used for syncing contacts and calendars between a mobile device and a
server?
A) SMTP
B) IMAP
C) ActiveSync
D) SNMP
ANSWER: C
Rationale: A is for sending email. B is for receiving email. C is correct as Microsoft Exchange ActiveSync
synchronizes email, contacts, and calendars. D is for network management.
A user complains their laptop screen is very dim, even at 100% brightness. What is the MOST likely
cause?
A) Dead pixels
Summary Notes 2026!! Actual
Domain 1: Mobile Devices
Which laptop component is responsible for converting physical finger touches into digital input signals?
A) Inverter
B) Digitizer
C) Polarizer
D) EMR
ANSWER: B
Rationale: A is incorrect as it powers the backlight. B is correct as it translates touch into input. C is
incorrect as it filters light for the display. D is incorrect as it is a technology for stylus input.
A field technician needs a mobile device that can withstand drops, dust, and water. Which feature is
MOST important?
A) High-resolution OLED screen
B) Ruggedized casing
C) Digitizer stylus support
D) Thunderbolt 4 ports
ANSWER: B
Rationale: A is fragile and not ideal for harsh environments. B is correct as it provides physical protection
against environmental hazards. C is a nice-to-have but not essential for durability. D is irrelevant to
physical protection.
Which device allows a laptop to connect to multiple peripherals and charge simultaneously via a single
cable?
A) Port replicator
B) Docking station
C) KVM switch
D) Mini-PC
ANSWER: B
,Rationale: A is a basic version that only mirrors existing ports. B is correct as it provides full connectivity,
power delivery, and often extra expansion slots. C is incorrect as it switches inputs between multiple
computers. D is a standalone computer.
Which mobile device configuration is BEST for a corporate executive who travels frequently?
A) Thick bezel, heavy battery, HDD
B) 2-in-1 convertible, lightweight, LTE connectivity
C) Rugged tablet, barcode scanner
D) Desktop replacement, high-end GPU
ANSWER: B
Rationale: A is too heavy and slow for travel. B is correct as it offers portability, versatility, and constant
internet access. C is for inventory/field work. D is too bulky for frequent travel.
What is the primary advantage of an OLED display over an LCD display?
A) Lower cost
B) True blacks and infinite contrast ratio
C) Higher refresh rates only
D) Better outdoor visibility in direct sunlight
ANSWER: B
Rationale: A is incorrect as OLEDs are more expensive. B is correct because OLED pixels turn off
completely to produce true black. C is incorrect as LCDs can also have high refresh rates. D is incorrect as
OLEDs can struggle in direct sunlight compared to high-nit LCDs.
Which wireless technology is commonly used for contactless mobile payments?
A) Bluetooth
B) Wi-Fi
C) NFC
D) IR
ANSWER: C
Rationale: A is for longer-range peripheral connections. B is for local area networking. C is correct as
Near Field Communication is designed for short-range, secure transactions. D is for line-of-sight remote
controls.
A user's smartphone battery is swelling and pushing the screen out. What is the FIRST step?
A) Continue using it until it dies
,B) Place it in a freezer
C) Power it off and handle with care
D) Pierce the battery to release gas
ANSWER: C
Rationale: A is dangerous and can cause a fire. B is ineffective and can cause condensation damage. C is
correct to prevent thermal runaway or explosion. D is extremely dangerous and will cause a fire.
Which laptop feature allows the screen to be used in bright sunlight by reducing reflections?
A) Privacy filter
B) Anti-glare coating
C) Digitizer
D) OLED panel
ANSWER: B
Rationale: A restricts viewing angles to prevent shoulder surfing. B is correct as it diffuses light to reduce
reflections. C is for touch input. D is a display technology, not an anti-glare feature.
What is the purpose of a privacy filter on a laptop screen?
A) Increase screen brightness
B) Prevent shoulder surfing
C) Reduce blue light emission
D) Protect the screen from scratches
ANSWER: B
Rationale: A is incorrect; it actually reduces brightness. B is correct as it narrows the viewing angle so
only the user can see the screen. C is a software or hardware feature, not a filter's primary purpose. D is
the purpose of a screen protector.
Which mobile device is BEST suited for a warehouse worker who needs to scan barcodes?
A) Smartphone with a camera app
B) Rugged tablet with an integrated laser scanner
C) 2-in-1 convertible laptop
D) E-reader
ANSWER: B
, Rationale: A is slow and unreliable in poor lighting. B is correct as it is durable and has a dedicated, fast
hardware scanner. C is too fragile and bulky. D cannot scan barcodes.
Which connector type is reversible and supports high-speed data, video, and power delivery?
A) Micro-USB
B) Lightning
C) USB-C
D) Mini-USB
ANSWER: C
Rationale: A is not reversible and has low power limits. B is reversible but proprietary to Apple and lacks
universal video support. C is correct as it is the universal standard for reversible data, video, and power.
D is an older, non-reversible standard.
What does the term "form factor" refer to in mobile devices?
A) The operating system version
B) The physical size, shape, and layout
C) The battery capacity
D) The processor speed
ANSWER: B
Rationale: A is software. B is correct as it defines the physical dimensions and design (e.g., slate,
convertible, rugged). C is a hardware specification. D is a performance specification.
Which protocol is primarily used for syncing contacts and calendars between a mobile device and a
server?
A) SMTP
B) IMAP
C) ActiveSync
D) SNMP
ANSWER: C
Rationale: A is for sending email. B is for receiving email. C is correct as Microsoft Exchange ActiveSync
synchronizes email, contacts, and calendars. D is for network management.
A user complains their laptop screen is very dim, even at 100% brightness. What is the MOST likely
cause?
A) Dead pixels
