COMPTIA A+ CORE 1
CERTIFICATION PRACTICE
QUESTIONS 2026|||questions and
answers with rationales/graded
A+/2026 update/100% correct /instant
download
Latest Topic Test – 80+ Questions for Student School Exam
Section 1: Mobile Devices (12 Questions)
1. A technician needs to replace a laptop LCD screen that has a broken backlight
but still shows a faint image. What type of LCD technology is most likely in use?
A) OLED
B) TN with CCFL backlight
C) IPS with LED backlight
D) Plasma
Correct Answer: B
Rationale: CCFL (cold cathode fluorescent lamp) backlights can fail while the
LCD panel still works, leaving a faint image. LED backlights usually fail
completely.
2. Which mobile device component converts DC power from the battery to the
various voltages required by system components?
A) Inverter
B) Voltage regulator module (VRM)
C) Power MOSFET
D) Digitizer
Correct Answer: B
Rationale: VRMs regulate voltage for CPU, memory, etc. Inverters are for old
CCFL backlights.
,3. A laptop has a non-removable battery and will not power on. Which step should
be taken first?
A) Replace the motherboard
B) Perform a hard reset by holding power button for 30 seconds
C) Remove the CMOS battery
D) Desolder the battery
Correct Answer: B
Rationale: Hard reset drains residual charge and often fixes embedded battery
issues.
4. Which docking connector type is commonly used for simultaneous power,
video, and data in modern laptops?
A) USB-A
B) Thunderbolt 4 (USB-C)
C) RJ45
D) VGA
Correct Answer: B
*Rationale: Thunderbolt 4 over USB-C supports power delivery, DisplayPort, and
PCIe data.*
5. A technician notices a laptop battery swelling. What should they do?
A) Continue using it until it fails
B) Place it in regular trash
C) Discontinue use, remove carefully, and dispose at e-waste facility
D) Puncture to release gas
Correct Answer: C
Rationale: Swollen Li-ion batteries are fire hazards and require proper hazardous
waste disposal.
6. Which feature allows a tablet to be used as a secondary display for a laptop
wirelessly?
A) Miracast
B) AirPlay
C) NFC pairing
D) USB tethering
Correct Answer: A
Rationale: Miracast supports screen extension/mirroring over Wi-Fi Direct.
, 7. What is the primary advantage of an eSIM over a physical SIM?
A) Higher data speeds
B) Remote provisioning and multiple profiles
C) Better encryption
D) Longer battery life
Correct Answer: B
Rationale: eSIM allows carrier profile downloads without swapping physical
cards.
8. Which smartphone sensor is used to automatically rotate the screen?
A) Gyroscope
B) Accelerometer
C) Magnetometer
D) Proximity sensor
Correct Answer: B
Rationale: Accelerometer detects orientation change; gyroscope adds rotation
precision.
9. A laptop keyboard has several keys not working. After external keyboard works
fine, what is most likely the issue?
A) Driver corruption
B) Faulty ribbon cable connection
C) BIOS setting
D) Stuck Windows update
Correct Answer: B
Rationale: Internal keyboard uses a ribbon cable to the motherboard; external
keyboard working proves OS/drivers fine.
10. What is the typical lifespan of a modern laptop Li-ion battery under normal
use?
A) 3–6 months
B) 1–2 years
C) 3–5 years
D) 8–10 years
Correct Answer: C
*Rationale: Li-ion batteries degrade after 300–500 charge cycles (~3-5 years).*
CERTIFICATION PRACTICE
QUESTIONS 2026|||questions and
answers with rationales/graded
A+/2026 update/100% correct /instant
download
Latest Topic Test – 80+ Questions for Student School Exam
Section 1: Mobile Devices (12 Questions)
1. A technician needs to replace a laptop LCD screen that has a broken backlight
but still shows a faint image. What type of LCD technology is most likely in use?
A) OLED
B) TN with CCFL backlight
C) IPS with LED backlight
D) Plasma
Correct Answer: B
Rationale: CCFL (cold cathode fluorescent lamp) backlights can fail while the
LCD panel still works, leaving a faint image. LED backlights usually fail
completely.
2. Which mobile device component converts DC power from the battery to the
various voltages required by system components?
A) Inverter
B) Voltage regulator module (VRM)
C) Power MOSFET
D) Digitizer
Correct Answer: B
Rationale: VRMs regulate voltage for CPU, memory, etc. Inverters are for old
CCFL backlights.
,3. A laptop has a non-removable battery and will not power on. Which step should
be taken first?
A) Replace the motherboard
B) Perform a hard reset by holding power button for 30 seconds
C) Remove the CMOS battery
D) Desolder the battery
Correct Answer: B
Rationale: Hard reset drains residual charge and often fixes embedded battery
issues.
4. Which docking connector type is commonly used for simultaneous power,
video, and data in modern laptops?
A) USB-A
B) Thunderbolt 4 (USB-C)
C) RJ45
D) VGA
Correct Answer: B
*Rationale: Thunderbolt 4 over USB-C supports power delivery, DisplayPort, and
PCIe data.*
5. A technician notices a laptop battery swelling. What should they do?
A) Continue using it until it fails
B) Place it in regular trash
C) Discontinue use, remove carefully, and dispose at e-waste facility
D) Puncture to release gas
Correct Answer: C
Rationale: Swollen Li-ion batteries are fire hazards and require proper hazardous
waste disposal.
6. Which feature allows a tablet to be used as a secondary display for a laptop
wirelessly?
A) Miracast
B) AirPlay
C) NFC pairing
D) USB tethering
Correct Answer: A
Rationale: Miracast supports screen extension/mirroring over Wi-Fi Direct.
, 7. What is the primary advantage of an eSIM over a physical SIM?
A) Higher data speeds
B) Remote provisioning and multiple profiles
C) Better encryption
D) Longer battery life
Correct Answer: B
Rationale: eSIM allows carrier profile downloads without swapping physical
cards.
8. Which smartphone sensor is used to automatically rotate the screen?
A) Gyroscope
B) Accelerometer
C) Magnetometer
D) Proximity sensor
Correct Answer: B
Rationale: Accelerometer detects orientation change; gyroscope adds rotation
precision.
9. A laptop keyboard has several keys not working. After external keyboard works
fine, what is most likely the issue?
A) Driver corruption
B) Faulty ribbon cable connection
C) BIOS setting
D) Stuck Windows update
Correct Answer: B
Rationale: Internal keyboard uses a ribbon cable to the motherboard; external
keyboard working proves OS/drivers fine.
10. What is the typical lifespan of a modern laptop Li-ion battery under normal
use?
A) 3–6 months
B) 1–2 years
C) 3–5 years
D) 8–10 years
Correct Answer: C
*Rationale: Li-ion batteries degrade after 300–500 charge cycles (~3-5 years).*
