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COMPTIA A+ PRACTICE EXAM 2026/2027 |
COMPTIA A+ | 90 VERIFIED Q&A | DETAILED
RATIONALES | PASS GUARANTEED – A+ GRADED
SECTION 1: MOBILE DEVICES – Questions 1–12
Q1: Mobile Devices – Laptop Hardware
The student is reviewing laptop hardware. Which component converts AC power to DC power for a
laptop?
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, the inverter is not typically used in laptops,
and the DC jack is the port where the adapter connects. [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. Plasma and CRT are older technologies not used in modern laptops. [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.
Ctrl+Alt+Del is for security options, Alt+Tab switches applications. [100% CORRECT]
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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. DIMM is for desktops. RIMM and SIMM are older. [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. 3.5-inch HDDs are too
large; 2.5-inch HDDs are older; optical drives are obsolete. [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. Lightning
is Apple-specific. USB-A and USB-B are older. [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. The
display shows images, power is from battery, Wi-Fi is a separate component. [100% CORRECT]
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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. Bluetooth is for short-
range data, Wi-Fi for networking, GPS for location. [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. 4G LTE is slower, 3G and GSM are older.
[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. SMTP is for sending, POP3/IMAP for retrieving email. [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
COMPTIA A+ PRACTICE EXAM 2026/2027 |
COMPTIA A+ | 90 VERIFIED Q&A | DETAILED
RATIONALES | PASS GUARANTEED – A+ GRADED
SECTION 1: MOBILE DEVICES – Questions 1–12
Q1: Mobile Devices – Laptop Hardware
The student is reviewing laptop hardware. Which component converts AC power to DC power for a
laptop?
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, the inverter is not typically used in laptops,
and the DC jack is the port where the adapter connects. [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. Plasma and CRT are older technologies not used in modern laptops. [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.
Ctrl+Alt+Del is for security options, Alt+Tab switches applications. [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. DIMM is for desktops. RIMM and SIMM are older. [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. 3.5-inch HDDs are too
large; 2.5-inch HDDs are older; optical drives are obsolete. [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. Lightning
is Apple-specific. USB-A and USB-B are older. [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. The
display shows images, power is from battery, Wi-Fi is a separate component. [100% CORRECT]
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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. Bluetooth is for short-
range data, Wi-Fi for networking, GPS for location. [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. 4G LTE is slower, 3G and GSM are older.
[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. SMTP is for sending, POP3/IMAP for retrieving email. [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
