COMPTIA A+ CERTIFICATION EXAM –QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF.
*CORE DOMAINS*
*Mobile Devices*
*Networking*
*Hardware*
*Virtualization and Cloud Computing*
*Hardware and Network Troubleshooting*
*Operating Systems*
*Security*
*Software Troubleshooting*
*Operational Procedures*
*INTRODUCTION*
The CompTIA A+ certification exam serves as the industry standard for establishing a career in IT. This assessment is designed to validate the
foundational skills required of modern IT professionals, including networking, operating systems, security, and mobile devices. The exam utilizes a
combination of multiple-choice and complex scenario-based questions to measure technical proficiency and problem-solving abilities. Candidates
are evaluated on their capacity to support today’s core technologies while demonstrating critical thinking and professional ethics. By emphasizing
real-world application and informed decision-making, this exam ensures that certified individuals can effectively troubleshoot, maintain, and secure
diverse hardware and software environments in a professional capacity.
SECTION ONE: QUESTIONS 1–100
1. A technician is tasked with upgrading the RAM in a high-end workstation. The motherboard supports quad-channel memory. How many
identical memory modules should the technician install to utilize this feature?
A. 1
B. 2
🟢 C. 4
D. 8
,🔴 RATIONALE: Quad-channel architecture requires four identical memory modules to be installed in specific slots to multiply the data transfer rate
between the RAM and the CPU.
2. A user reports that their laptop screen is very dim, but an image is still visible when a flashlight is held against the glass. Which component
most likely needs replacement?
🟢 A. Inverter
B. Digitizer
C. Backlight cable
D. CMOS battery
🔴 RATIONALE: In older laptops with CCFL backlighting, the inverter converts DC power to AC for the backlight; a failure results in a dark screen
where the image remains faintly visible.
3. Which of the following wireless standards operates exclusively in the 5 GHz frequency band?
A. 802.11g
B. 802.11n
🟢 C. 802.11ac
D. 802.11b
🔴 RATIONALE: 802.11ac (Wi-Fi 5) was designed to operate solely in the 5 GHz range to avoid interference and provide higher throughput, unlike
802.11n which is dual-band.
4. A company requires a storage solution that provides both high speed and redundancy by striping data across three or more drives with parity.
Which RAID level should be implemented?
A. RAID 0
B. RAID 1
🟢 C. RAID 5
D. RAID 10
🔴 RATIONALE: RAID 5 uses block-level striping with distributed parity, requiring at least three disks. It offers a balance of performance and fault
tolerance.
5. Which port number is used by the Secure Shell (SSH) protocol for encrypted remote management?
A. 21
🟢 B. 22
, C. 23
D. 80
🔴 RATIONALE: SSH uses TCP port 22 by default to provide secure, encrypted console access to remote servers and networking equipment.
6. A technician is troubleshooting a PC that shuts down unexpectedly after 10 minutes of heavy use. The technician suspects overheating.
Which tool should be checked first?
A. Event Viewer
B. Device Manager
🟢 C. BIOS/UEFI thermal readings
D. Disk Management
🔴 RATIONALE: BIOS/UEFI provides real-time hardware monitoring, including CPU temperature and fan speeds, which is essential for diagnosing
thermal-related shutdowns.
7. Which cloud computing concept allows a provider to dynamically allocate physical resources to multiple customers based on demand?
🟢 A. Resource pooling
B. On-demand self-service
C. Measured service
D. Rapid elasticity
🔴 RATIONALE: Resource pooling serves multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically
assigned according to consumer demand.
8. A customer wants to ensure that their data is destroyed beyond recovery before recycling an old mechanical hard drive. Which method is
most effective?
A. Low-level format
B. Standard Windows format
🟢 C. Degaussing
D. Deleting the partition table
🔴 RATIONALE: Degaussing uses a powerful magnetic field to disrupt the magnetic domains on the platters of a hard drive, rendering the data
unrecoverable and the drive unusable.
9. Which IP address is a valid example of a Private Class B address?
INSTANT DOWNLOAD PDF.
*CORE DOMAINS*
*Mobile Devices*
*Networking*
*Hardware*
*Virtualization and Cloud Computing*
*Hardware and Network Troubleshooting*
*Operating Systems*
*Security*
*Software Troubleshooting*
*Operational Procedures*
*INTRODUCTION*
The CompTIA A+ certification exam serves as the industry standard for establishing a career in IT. This assessment is designed to validate the
foundational skills required of modern IT professionals, including networking, operating systems, security, and mobile devices. The exam utilizes a
combination of multiple-choice and complex scenario-based questions to measure technical proficiency and problem-solving abilities. Candidates
are evaluated on their capacity to support today’s core technologies while demonstrating critical thinking and professional ethics. By emphasizing
real-world application and informed decision-making, this exam ensures that certified individuals can effectively troubleshoot, maintain, and secure
diverse hardware and software environments in a professional capacity.
SECTION ONE: QUESTIONS 1–100
1. A technician is tasked with upgrading the RAM in a high-end workstation. The motherboard supports quad-channel memory. How many
identical memory modules should the technician install to utilize this feature?
A. 1
B. 2
🟢 C. 4
D. 8
,🔴 RATIONALE: Quad-channel architecture requires four identical memory modules to be installed in specific slots to multiply the data transfer rate
between the RAM and the CPU.
2. A user reports that their laptop screen is very dim, but an image is still visible when a flashlight is held against the glass. Which component
most likely needs replacement?
🟢 A. Inverter
B. Digitizer
C. Backlight cable
D. CMOS battery
🔴 RATIONALE: In older laptops with CCFL backlighting, the inverter converts DC power to AC for the backlight; a failure results in a dark screen
where the image remains faintly visible.
3. Which of the following wireless standards operates exclusively in the 5 GHz frequency band?
A. 802.11g
B. 802.11n
🟢 C. 802.11ac
D. 802.11b
🔴 RATIONALE: 802.11ac (Wi-Fi 5) was designed to operate solely in the 5 GHz range to avoid interference and provide higher throughput, unlike
802.11n which is dual-band.
4. A company requires a storage solution that provides both high speed and redundancy by striping data across three or more drives with parity.
Which RAID level should be implemented?
A. RAID 0
B. RAID 1
🟢 C. RAID 5
D. RAID 10
🔴 RATIONALE: RAID 5 uses block-level striping with distributed parity, requiring at least three disks. It offers a balance of performance and fault
tolerance.
5. Which port number is used by the Secure Shell (SSH) protocol for encrypted remote management?
A. 21
🟢 B. 22
, C. 23
D. 80
🔴 RATIONALE: SSH uses TCP port 22 by default to provide secure, encrypted console access to remote servers and networking equipment.
6. A technician is troubleshooting a PC that shuts down unexpectedly after 10 minutes of heavy use. The technician suspects overheating.
Which tool should be checked first?
A. Event Viewer
B. Device Manager
🟢 C. BIOS/UEFI thermal readings
D. Disk Management
🔴 RATIONALE: BIOS/UEFI provides real-time hardware monitoring, including CPU temperature and fan speeds, which is essential for diagnosing
thermal-related shutdowns.
7. Which cloud computing concept allows a provider to dynamically allocate physical resources to multiple customers based on demand?
🟢 A. Resource pooling
B. On-demand self-service
C. Measured service
D. Rapid elasticity
🔴 RATIONALE: Resource pooling serves multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically
assigned according to consumer demand.
8. A customer wants to ensure that their data is destroyed beyond recovery before recycling an old mechanical hard drive. Which method is
most effective?
A. Low-level format
B. Standard Windows format
🟢 C. Degaussing
D. Deleting the partition table
🔴 RATIONALE: Degaussing uses a powerful magnetic field to disrupt the magnetic domains on the platters of a hard drive, rendering the data
unrecoverable and the drive unusable.
9. Which IP address is a valid example of a Private Class B address?
