CompTIA A+ — Foundational IT Hardware & Software
Skills (Practice Exam) NEWEST 2025- 2026 UPDATE 100
QUESTIONS & 100% CORRECT ANSWERS GRADED A+ (BRAND
NEW!!)
Content covered (most tested areas): PC hardware,
mobile devices, networking basics, hardware
troubleshooting, operating systems, security
fundamentals, peripherals, virtualization & cloud, safety
procedures.
1. Which component is considered the “brain” of a
computer?
CPU (Central Processing Unit)
The CPU executes instructions and processes data, controlling overall system
operations.
2. Which storage device uses flash memory and has no
moving parts?
Solid State Drive (SSD)
SSDs store data electronically, making them faster and more durable than
mechanical drives.
3. What type of RAM is typically used in modern desktop
computers?
DDR4 or DDR5 SDRAM
Double Data Rate SDRAM is the standard volatile memory for current
systems.
,4. Which connector is commonly used to attach a monitor
to a PC with digital video only?
DVI-D
DVI-D transmits digital signals without analog support.
5. What component supplies power to all internal PC parts?
Power Supply Unit (PSU)
The PSU converts AC power from the outlet into DC power for computer
components.
6. Which device allows multiple computers to communicate
within a local network?
Switch
A switch forwards data to specific devices using MAC addresses.
7. What type of cable is used for most wired Ethernet
networks?
Cat 6 twisted-pair cable
Category 6 supports high-speed LAN connections up to 10 Gbps over short
distances.
8. Which port number is used by HTTP?
Port 80
HTTP traffic for web pages typically uses TCP port 80.
9. What does BIOS stand for?
Basic Input/Output System
BIOS initializes hardware during the boot process.
10. Which mobile device feature allows tap-to-pay
transactions?
NFC (Near Field Communication)
, NFC enables short-range wireless communication for payments and data
transfer.
11. What is the primary purpose of a firewall?
To filter network traffic and block unauthorized access
Firewalls enforce security rules between networks.
12. Which Windows utility shows running processes and
performance data?
Task Manager
Task Manager helps monitor system resources and end processes.
13. What type of malware disguises itself as legitimate
software?
Trojan horse
Trojans trick users into installing malicious programs.
14. Which connector provides both data transfer and
power for many peripherals?
USB (Universal Serial Bus)
USB is widely used for keyboards, mice, storage devices, and more.
15. What does VPN stand for?
Virtual Private Network
A VPN encrypts traffic to securely connect to another network over the
internet.
16. Which printer type uses powdered ink and heat to
produce images?
Laser printer
Toner powder is fused onto paper using heat.
Skills (Practice Exam) NEWEST 2025- 2026 UPDATE 100
QUESTIONS & 100% CORRECT ANSWERS GRADED A+ (BRAND
NEW!!)
Content covered (most tested areas): PC hardware,
mobile devices, networking basics, hardware
troubleshooting, operating systems, security
fundamentals, peripherals, virtualization & cloud, safety
procedures.
1. Which component is considered the “brain” of a
computer?
CPU (Central Processing Unit)
The CPU executes instructions and processes data, controlling overall system
operations.
2. Which storage device uses flash memory and has no
moving parts?
Solid State Drive (SSD)
SSDs store data electronically, making them faster and more durable than
mechanical drives.
3. What type of RAM is typically used in modern desktop
computers?
DDR4 or DDR5 SDRAM
Double Data Rate SDRAM is the standard volatile memory for current
systems.
,4. Which connector is commonly used to attach a monitor
to a PC with digital video only?
DVI-D
DVI-D transmits digital signals without analog support.
5. What component supplies power to all internal PC parts?
Power Supply Unit (PSU)
The PSU converts AC power from the outlet into DC power for computer
components.
6. Which device allows multiple computers to communicate
within a local network?
Switch
A switch forwards data to specific devices using MAC addresses.
7. What type of cable is used for most wired Ethernet
networks?
Cat 6 twisted-pair cable
Category 6 supports high-speed LAN connections up to 10 Gbps over short
distances.
8. Which port number is used by HTTP?
Port 80
HTTP traffic for web pages typically uses TCP port 80.
9. What does BIOS stand for?
Basic Input/Output System
BIOS initializes hardware during the boot process.
10. Which mobile device feature allows tap-to-pay
transactions?
NFC (Near Field Communication)
, NFC enables short-range wireless communication for payments and data
transfer.
11. What is the primary purpose of a firewall?
To filter network traffic and block unauthorized access
Firewalls enforce security rules between networks.
12. Which Windows utility shows running processes and
performance data?
Task Manager
Task Manager helps monitor system resources and end processes.
13. What type of malware disguises itself as legitimate
software?
Trojan horse
Trojans trick users into installing malicious programs.
14. Which connector provides both data transfer and
power for many peripherals?
USB (Universal Serial Bus)
USB is widely used for keyboards, mice, storage devices, and more.
15. What does VPN stand for?
Virtual Private Network
A VPN encrypts traffic to securely connect to another network over the
internet.
16. Which printer type uses powdered ink and heat to
produce images?
Laser printer
Toner powder is fused onto paper using heat.
