Page 1 of 157
CompTIA A+ IT Technician Certification Exam
Practice Questions with Verified Answers &
Detailed Rationales LATEST UPDATE THIS YEAR
CompTIA A+ IT Technician Certification
Practice Exam 1 — Questions & Correct Answers with Rationales
SUMMARIZED EXAM COVERAGE
Hardware – Motherboards, CPUs, RAM types and configurations, storage devices (HDD, SSD,
NVMe), power supplies, expansion cards, peripherals, display technologies, laptop components
Networking – TCP/IP, DNS, DHCP, routers, switches, access points, cabling standards (Cat
5e/6/6a), wireless standards (802.11a/b/g/n/ac/ax), network types (LAN, WAN, PAN, MAN),
ports and protocols, VPN, firewalls
Mobile Devices – Smartphones, tablets, wearables, laptop hardware, mobile connectivity
(Bluetooth, NFC, cellular), synchronization, email configuration
Operating Systems – Windows 10/11, macOS, Linux, Chrome OS, command-line tools, OS
installations, upgrades, file systems (NTFS, FAT32, exFAT, ext4), user accounts, permissions
Security – Physical security, logical security, malware types, social engineering, authentication
methods (MFA, biometrics), encryption, firewalls, wireless security (WPA2/WPA3), data
destruction
Virtualization & Cloud Computing – Hypervisors, virtual machines, cloud service models (IaaS,
PaaS, SaaS), cloud deployment models (public, private, hybrid, community)
Troubleshooting – Hardware troubleshooting, software troubleshooting, network
troubleshooting, mobile device troubleshooting, systematic troubleshooting methodology
Operational Procedures – Safety procedures (ESD, electrical), environmental controls,
documentation, change management, professionalism, communication, privacy, licensing
SECTION 1: HARDWARE (Questions 1–50)
1. A technician is installing a new motherboard and needs to connect the front panel headers.
Which of the following connectors is responsible for the power button?
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A) HDD LED
B) Power SW
C) Reset SW
D) Speaker
Answer: B
The Power SW (Power Switch) connector is responsible for the power button on the front panel.
It connects the power button to the motherboard header. HDD LED is for the hard drive activity
light, Reset SW is for the reset button, and Speaker is for system beeps.
2. Which of the following RAM types is the fastest?
A) DDR3
B) DDR4
C) DDR5
D) SDRAM
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Answer: C
DDR5 is the fastest RAM type available, offering higher bandwidth and lower power
consumption compared to DDR4 and DDR3. SDRAM is an older technology and is significantly
slower.
3. A user reports that their laptop screen is very dim even at maximum brightness. Which of the
following components is most likely failing?
A) LCD panel
B) Inverter or backlight
C) Graphics card
D) Battery
Answer: B
The inverter (in older laptops) or backlight (in newer LED-backlit laptops) is responsible for
illuminating the screen. A failing inverter or backlight causes a dim display. The LCD panel,
graphics card, and battery would cause different symptoms.
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4. Which of the following CPU socket types is designed for AMD processors?
A) LGA 1700
B) AM4
C) LGA 1200
D) Socket 1151
Answer: B
AM4 is an AMD CPU socket. LGA 1700, LGA 1200, and Socket 1151 are Intel socket types. AMD
uses AM4, AM5, TR4, and other socket types.
5. What is the primary purpose of a heat sink in a computer?
A) To increase CPU speed
B) To dissipate heat away from the CPU
C) To provide power to the CPU
D) To connect the CPU to the motherboard
CompTIA A+ IT Technician Certification Exam
Practice Questions with Verified Answers &
Detailed Rationales LATEST UPDATE THIS YEAR
CompTIA A+ IT Technician Certification
Practice Exam 1 — Questions & Correct Answers with Rationales
SUMMARIZED EXAM COVERAGE
Hardware – Motherboards, CPUs, RAM types and configurations, storage devices (HDD, SSD,
NVMe), power supplies, expansion cards, peripherals, display technologies, laptop components
Networking – TCP/IP, DNS, DHCP, routers, switches, access points, cabling standards (Cat
5e/6/6a), wireless standards (802.11a/b/g/n/ac/ax), network types (LAN, WAN, PAN, MAN),
ports and protocols, VPN, firewalls
Mobile Devices – Smartphones, tablets, wearables, laptop hardware, mobile connectivity
(Bluetooth, NFC, cellular), synchronization, email configuration
Operating Systems – Windows 10/11, macOS, Linux, Chrome OS, command-line tools, OS
installations, upgrades, file systems (NTFS, FAT32, exFAT, ext4), user accounts, permissions
Security – Physical security, logical security, malware types, social engineering, authentication
methods (MFA, biometrics), encryption, firewalls, wireless security (WPA2/WPA3), data
destruction
Virtualization & Cloud Computing – Hypervisors, virtual machines, cloud service models (IaaS,
PaaS, SaaS), cloud deployment models (public, private, hybrid, community)
Troubleshooting – Hardware troubleshooting, software troubleshooting, network
troubleshooting, mobile device troubleshooting, systematic troubleshooting methodology
Operational Procedures – Safety procedures (ESD, electrical), environmental controls,
documentation, change management, professionalism, communication, privacy, licensing
SECTION 1: HARDWARE (Questions 1–50)
1. A technician is installing a new motherboard and needs to connect the front panel headers.
Which of the following connectors is responsible for the power button?
,Page 2 of 157
A) HDD LED
B) Power SW
C) Reset SW
D) Speaker
Answer: B
The Power SW (Power Switch) connector is responsible for the power button on the front panel.
It connects the power button to the motherboard header. HDD LED is for the hard drive activity
light, Reset SW is for the reset button, and Speaker is for system beeps.
2. Which of the following RAM types is the fastest?
A) DDR3
B) DDR4
C) DDR5
D) SDRAM
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Answer: C
DDR5 is the fastest RAM type available, offering higher bandwidth and lower power
consumption compared to DDR4 and DDR3. SDRAM is an older technology and is significantly
slower.
3. A user reports that their laptop screen is very dim even at maximum brightness. Which of the
following components is most likely failing?
A) LCD panel
B) Inverter or backlight
C) Graphics card
D) Battery
Answer: B
The inverter (in older laptops) or backlight (in newer LED-backlit laptops) is responsible for
illuminating the screen. A failing inverter or backlight causes a dim display. The LCD panel,
graphics card, and battery would cause different symptoms.
, Page 4 of 157
4. Which of the following CPU socket types is designed for AMD processors?
A) LGA 1700
B) AM4
C) LGA 1200
D) Socket 1151
Answer: B
AM4 is an AMD CPU socket. LGA 1700, LGA 1200, and Socket 1151 are Intel socket types. AMD
uses AM4, AM5, TR4, and other socket types.
5. What is the primary purpose of a heat sink in a computer?
A) To increase CPU speed
B) To dissipate heat away from the CPU
C) To provide power to the CPU
D) To connect the CPU to the motherboard
