Comptia A+ Test Bank 2026/2027 | Comptia A+ | 300 Verified Q&A | Detailed Rationales | Ngn-Aligned | Pass Guaranteed – A+ Graded

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COMPTIA A+ TEST BANK 2026/2027 | COMPTIA A+ |
300 VERIFIED Q&A | DETAILED RATIONALES |
NGN-ALIGNED | PASS GUARANTEED – A+ GRADED

SECTION 1: MOBILE DEVICES – Questions 1–30



Q1: Mobile Devices – Laptop Hardware
The student is reviewing laptop hardware. Which laptop component is responsible for converting AC
power to DC power?
A. Battery
B. AC adapter
C. Inverter
D. DC jack

Correct Answer: B
Rationale: The AC adapter converts alternating current (AC) from a wall outlet to direct current (DC)
that the laptop can use. The battery stores DC power. [100% CORRECT]



Q2: Mobile Devices – Laptop Display
The student is reviewing laptop displays. Which display technology uses a backlight and liquid crystal
solution?
A. OLED
B. LCD
C. Plasma
D. CRT

Correct Answer: B
Rationale: LCD (Liquid Crystal Display) uses a backlight and liquid crystals. OLED does not require a
backlight. [100% CORRECT]



Q3: Mobile Devices – Laptop Features
The student is reviewing laptop features. Which key combination toggles the display between the
internal screen and an external monitor?
A. Ctrl + Alt + Del
B. Fn + F4
C. Fn + F8 (or similar function key)
D. Alt + Tab

Correct Answer: C
Rationale: Most laptops use a function key (e.g., Fn + F4, Fn + F8) to switch display output. [100%
CORRECT]

,2


Q4: Mobile Devices – Laptop Memory
The student is reviewing laptop memory. Which type of memory module is commonly used in
laptops?
A. DIMM
B. SODIMM
C. RIMM
D. SIMM

Correct Answer: B
Rationale: SODIMM (Small Outline Dual In-line Memory Module) is the smaller form factor used in
laptops. [100% CORRECT]



Q5: Mobile Devices – Laptop Storage
The student is reviewing laptop storage. Which drive type is most common in modern thin laptops?
A. 3.5-inch HDD
B. 2.5-inch HDD
C. M.2 SSD
D. Optical drive

Correct Answer: C
Rationale: M.2 SSDs are small, fast, and common in modern thin laptops. [100% CORRECT]



Q6: Mobile Devices – Mobile Device Accessories
The student is reviewing mobile accessories. Which port is commonly used to charge modern
smartphones and tablets?
A. USB-A
B. USB-B
C. USB-C
D. Lightning (Apple only)

Correct Answer: C
Rationale: USB-C is now the standard for charging most modern smartphones and tablets. [100%
CORRECT]



Q7: Mobile Devices – Tablet Features
The student is reviewing tablet features. What is the primary purpose of a digitizer in a tablet?
A. To convert touch input to digital signals
B. To display images
C. To provide power
D. To connect to Wi-Fi

Correct Answer: A
Rationale: The digitizer converts touch or stylus input into digital signals the device can process.
[100% CORRECT]

,3


Q8: Mobile Devices – Smartphone Features
The student is reviewing smartphone features. Which technology allows a smartphone to make
payments wirelessly?
A. NFC
B. Bluetooth
C. Wi-Fi
D. GPS

Correct Answer: A
Rationale: NFC (Near Field Communication) enables contactless payments. [100% CORRECT]



Q9: Mobile Devices – Mobile Connectivity
The student is reviewing mobile connectivity. Which cellular technology provides the fastest data
speeds?
A. 3G
B. 4G LTE
C. 5G
D. GSM

Correct Answer: C
Rationale: 5G is the latest and fastest cellular technology. [100% CORRECT]



Q10: Mobile Devices – Mobile Device Synchronization
The student is reviewing synchronization. Which protocol is commonly used to synchronize email,
contacts, and calendars on mobile devices?
A. SMTP
B. POP3
C. IMAP
D. Exchange ActiveSync

Correct Answer: D
Rationale: Exchange ActiveSync is used for synchronizing email, contacts, and calendars on mobile
devices. [100% CORRECT]



Q11: Mobile Devices – Laptop Disassembly
The student is reviewing laptop disassembly. What is the first step when disassembling a laptop?
A. Remove the battery
B. Remove the hard drive
C. Remove the keyboard
D. Remove the screen

Correct Answer: A
Rationale: Always disconnect power sources first, starting with the battery, to prevent electrical
shock or damage. [100% CORRECT]

, 4


Q12: Mobile Devices – Laptop Keyboard
The student is reviewing laptop keyboards. Which laptop keyboard type uses a rubber dome and
membrane?
A. Mechanical
B. Scissor switch
C. Capacitive
D. Optical

Correct Answer: B
Rationale: Scissor switch keyboards are common in laptops, using a scissor-like mechanism. [100%
CORRECT]



Q13: Mobile Devices – Mobile Device Management
The student is reviewing MDM. What is the purpose of MDM in an enterprise?
A. To manage and secure mobile devices
B. To manage mainframes
C. To manage networks
D. To manage databases

Correct Answer: A
Rationale: Mobile Device Management (MDM) enforces policies and security on mobile devices
used in an organization. [100% CORRECT]



Q14: Mobile Devices – Laptop Power
The student is reviewing laptop power. What is the purpose of a laptop's DC jack?
A. To connect the AC adapter to the laptop
B. To connect to a printer
C. To connect to a monitor
D. To connect to a network

Correct Answer: A
Rationale: The DC jack accepts the connector from the AC adapter to power the laptop and charge
the battery. [100% CORRECT]



Q15: Mobile Devices – Mobile Accessories
The student is reviewing mobile accessories. Which accessory allows a smartphone to connect to a
wired network?
A. USB-C to Ethernet adapter
B. Bluetooth dongle
C. Wi-Fi hotspot
D. NFC tag

Correct Answer: A
Rationale: A USB-C to Ethernet adapter provides wired network connectivity. [100% CORRECT]