1
COMPTIA A+ - EXAM 2026/2027 | IT
CERTIFICATION | 120 VERIFIED Q&A |
DETAILED RATIONALES | NGN-ALIGNED |
PASS GUARANTEED – A+ GRADED
SECTION I: HARDWARE FUNDAMENTALS - Questions 1-20
Q1: Motherboard Components
The student is reviewing hardware fundamentals. What is the primary function of a motherboard?
A. To store long-term data
B. To connect and allow communication between all computer components
C. To process graphics
D. To provide power to the system
Correct Answer: B
Rationale: The motherboard is the main circuit board that connects the CPU, RAM, storage, and
peripherals, allowing them to communicate. [100% CORRECT]
Q2: CPU Socket Types
The student is reviewing CPU installation. What is the purpose of a CPU socket?
A. To connect the CPU to the motherboard
B. To store the operating system
C. To provide power to the CPU
D. To cool the CPU
Correct Answer: A
Rationale: The CPU socket is the connector on the motherboard that houses and connects the CPU,
allowing communication with other components. [100% CORRECT]
Q3: RAM Types
The student is reviewing memory. What is the difference between DDR3 and DDR4 RAM?
A. DDR3 is faster than DDR4
B. DDR4 has higher bandwidth and lower power consumption than DDR3
C. DDR3 and DDR4 are interchangeable
D. DDR4 uses less bandwidth
Correct Answer: B
,2
Rationale: DDR4 offers higher bandwidth, lower power consumption, and improved performance
compared to DDR3, and they are not physically compatible. [100% CORRECT]
Q4: Storage Types
The student is reviewing storage. What is an SSD?
A. A magnetic hard drive
B. A solid-state drive with no moving parts
C. An optical drive
D. A tape drive
Correct Answer: B
Rationale: An SSD (solid-state drive) uses flash memory with no moving parts, offering faster access
times and greater durability than traditional HDDs. [100% CORRECT]
Q5: Power Supply Units
The student is reviewing power supplies. What does the wattage rating on a PSU indicate?
A. The maximum power the PSU can deliver
B. The power consumption of the computer
C. The efficiency of the PSU
D. The voltage output
Correct Answer: A
Rationale: The wattage rating indicates the maximum total power the power supply unit can deliver
to the system components. [100% CORRECT]
Q6: GPU Purpose
The student is reviewing graphics. What is the primary function of a GPU?
A. To process general-purpose computations
B. To render images and video
C. To store data
D. To manage network connections
Correct Answer: B
Rationale: A GPU (graphics processing unit) is designed to render images, video, and 3D graphics,
offloading these tasks from the CPU. [100% CORRECT]
Q7: Expansion Slots
The student is reviewing expansion slots. What is a PCIe slot used for?
,3
A. To connect expansion cards such as graphics cards and network cards
B. To connect RAM
C. To connect the CPU
D. To connect storage drives
Correct Answer: A
Rationale: PCIe (Peripheral Component Interconnect Express) slots are used to connect high-speed
expansion cards like GPUs, network cards, and storage controllers. [100% CORRECT]
Q8: SATA Interface
The student is reviewing storage interfaces. What is SATA used for?
A. Connecting storage devices to the motherboard
B. Connecting monitors
C. Connecting keyboards
D. Connecting printers
Correct Answer: A
Rationale: SATA (Serial ATA) is an interface used to connect storage devices such as HDDs, SSDs, and
optical drives to the motherboard. [100% CORRECT]
Q9: NVMe
The student is reviewing storage. What is NVMe?
A. A protocol for accessing storage over PCIe
B. A type of RAM
C. A type of power supply
D. A type of network cable
Correct Answer: A
Rationale: NVMe (Non-Volatile Memory Express) is a high-speed protocol for accessing SSDs over
the PCIe bus, offering lower latency and higher throughput than SATA. [100% CORRECT]
Q10: RAID Levels
The student is reviewing RAID. What is RAID 0?
A. Mirroring for redundancy
B. Striping for performance with no redundancy
C. Parity for redundancy
D. A combination of mirroring and striping
Correct Answer: B
Rationale: RAID 0 stripes data across multiple drives for improved performance but provides no
redundancy; if one drive fails, all data is lost. [100% CORRECT]
, 4
Q11: RAID 1
The student is reviewing RAID. What is RAID 1?
A. Striping for performance
B. Mirroring for redundancy
C. Parity for redundancy
D. A combination of mirroring and striping
Correct Answer: B
Rationale: RAID 1 mirrors data across two drives for redundancy; if one drive fails, the other
contains a complete copy. [100% CORRECT]
Q12: RAID 5
The student is reviewing RAID. What is RAID 5?
A. Striping with distributed parity for redundancy
B. Mirroring for redundancy
C. Striping with no redundancy
D. A combination of mirroring and striping
Correct Answer: A
Rationale: RAID 5 stripes data and parity across three or more drives, providing redundancy and
performance; it can survive one drive failure. [100% CORRECT]
Q13: RAID 10
The student is reviewing RAID. What is RAID 10?
A. Striping with no redundancy
B. Mirroring with no striping
C. A combination of mirroring and striping
D. Parity-based redundancy
Correct Answer: C
Rationale: RAID 10 (1+0) combines mirroring and striping, offering both redundancy and
performance, and can survive multiple drive failures depending on configuration. [100% CORRECT]
Q14: BIOS/UEFI
The student is reviewing firmware. What is the purpose of BIOS/UEFI?
A. To initialize hardware and boot the operating system
B. To store user files
COMPTIA A+ - EXAM 2026/2027 | IT
CERTIFICATION | 120 VERIFIED Q&A |
DETAILED RATIONALES | NGN-ALIGNED |
PASS GUARANTEED – A+ GRADED
SECTION I: HARDWARE FUNDAMENTALS - Questions 1-20
Q1: Motherboard Components
The student is reviewing hardware fundamentals. What is the primary function of a motherboard?
A. To store long-term data
B. To connect and allow communication between all computer components
C. To process graphics
D. To provide power to the system
Correct Answer: B
Rationale: The motherboard is the main circuit board that connects the CPU, RAM, storage, and
peripherals, allowing them to communicate. [100% CORRECT]
Q2: CPU Socket Types
The student is reviewing CPU installation. What is the purpose of a CPU socket?
A. To connect the CPU to the motherboard
B. To store the operating system
C. To provide power to the CPU
D. To cool the CPU
Correct Answer: A
Rationale: The CPU socket is the connector on the motherboard that houses and connects the CPU,
allowing communication with other components. [100% CORRECT]
Q3: RAM Types
The student is reviewing memory. What is the difference between DDR3 and DDR4 RAM?
A. DDR3 is faster than DDR4
B. DDR4 has higher bandwidth and lower power consumption than DDR3
C. DDR3 and DDR4 are interchangeable
D. DDR4 uses less bandwidth
Correct Answer: B
,2
Rationale: DDR4 offers higher bandwidth, lower power consumption, and improved performance
compared to DDR3, and they are not physically compatible. [100% CORRECT]
Q4: Storage Types
The student is reviewing storage. What is an SSD?
A. A magnetic hard drive
B. A solid-state drive with no moving parts
C. An optical drive
D. A tape drive
Correct Answer: B
Rationale: An SSD (solid-state drive) uses flash memory with no moving parts, offering faster access
times and greater durability than traditional HDDs. [100% CORRECT]
Q5: Power Supply Units
The student is reviewing power supplies. What does the wattage rating on a PSU indicate?
A. The maximum power the PSU can deliver
B. The power consumption of the computer
C. The efficiency of the PSU
D. The voltage output
Correct Answer: A
Rationale: The wattage rating indicates the maximum total power the power supply unit can deliver
to the system components. [100% CORRECT]
Q6: GPU Purpose
The student is reviewing graphics. What is the primary function of a GPU?
A. To process general-purpose computations
B. To render images and video
C. To store data
D. To manage network connections
Correct Answer: B
Rationale: A GPU (graphics processing unit) is designed to render images, video, and 3D graphics,
offloading these tasks from the CPU. [100% CORRECT]
Q7: Expansion Slots
The student is reviewing expansion slots. What is a PCIe slot used for?
,3
A. To connect expansion cards such as graphics cards and network cards
B. To connect RAM
C. To connect the CPU
D. To connect storage drives
Correct Answer: A
Rationale: PCIe (Peripheral Component Interconnect Express) slots are used to connect high-speed
expansion cards like GPUs, network cards, and storage controllers. [100% CORRECT]
Q8: SATA Interface
The student is reviewing storage interfaces. What is SATA used for?
A. Connecting storage devices to the motherboard
B. Connecting monitors
C. Connecting keyboards
D. Connecting printers
Correct Answer: A
Rationale: SATA (Serial ATA) is an interface used to connect storage devices such as HDDs, SSDs, and
optical drives to the motherboard. [100% CORRECT]
Q9: NVMe
The student is reviewing storage. What is NVMe?
A. A protocol for accessing storage over PCIe
B. A type of RAM
C. A type of power supply
D. A type of network cable
Correct Answer: A
Rationale: NVMe (Non-Volatile Memory Express) is a high-speed protocol for accessing SSDs over
the PCIe bus, offering lower latency and higher throughput than SATA. [100% CORRECT]
Q10: RAID Levels
The student is reviewing RAID. What is RAID 0?
A. Mirroring for redundancy
B. Striping for performance with no redundancy
C. Parity for redundancy
D. A combination of mirroring and striping
Correct Answer: B
Rationale: RAID 0 stripes data across multiple drives for improved performance but provides no
redundancy; if one drive fails, all data is lost. [100% CORRECT]
, 4
Q11: RAID 1
The student is reviewing RAID. What is RAID 1?
A. Striping for performance
B. Mirroring for redundancy
C. Parity for redundancy
D. A combination of mirroring and striping
Correct Answer: B
Rationale: RAID 1 mirrors data across two drives for redundancy; if one drive fails, the other
contains a complete copy. [100% CORRECT]
Q12: RAID 5
The student is reviewing RAID. What is RAID 5?
A. Striping with distributed parity for redundancy
B. Mirroring for redundancy
C. Striping with no redundancy
D. A combination of mirroring and striping
Correct Answer: A
Rationale: RAID 5 stripes data and parity across three or more drives, providing redundancy and
performance; it can survive one drive failure. [100% CORRECT]
Q13: RAID 10
The student is reviewing RAID. What is RAID 10?
A. Striping with no redundancy
B. Mirroring with no striping
C. A combination of mirroring and striping
D. Parity-based redundancy
Correct Answer: C
Rationale: RAID 10 (1+0) combines mirroring and striping, offering both redundancy and
performance, and can survive multiple drive failures depending on configuration. [100% CORRECT]
Q14: BIOS/UEFI
The student is reviewing firmware. What is the purpose of BIOS/UEFI?
A. To initialize hardware and boot the operating system
B. To store user files
