CompTIA A+ Certification (CompTIA A+ (220-1101 & 220-
1102) – Practice Test (Questions 1–200) | Extracted from
different exams
1. You are troubleshooting a desktop PC that randomly shuts down after 10–15 minutes of use.
The system’s internal fans are running slowly, and you suspect overheating. Which is the most
appropriate first step?
✅ A) Open the case, check for dust buildup, and clean the fans and heat sinks
B) Replace the power supply immediately
C) Reinstall the operating system
D) Swap out the CPU
2. A user reports that their Windows laptop takes a very long time to boot and frequently freezes.
A quick check reveals the hard disk is at 98% capacity. What is the most likely cause of this
problem?
✅ A) The drive is nearly full, affecting performance due to limited virtual memory and
fragmentation
B) The CPU is overheating
C) The battery is failing
D) The Wi-Fi adapter is outdated
3. Which of the following is a key advantage of using SSDs (Solid-State Drives) compared to
HDDs?
✅ A) Faster read/write speeds with no moving parts, resulting in lower latency and better
durability
B) They cost less per gigabyte
C) They have unlimited write cycles
D) They require defragmentation
4. You are upgrading a PC and need to install additional RAM. The motherboard supports DDR4
memory. What will happen if you attempt to install a DDR3 module?
✅ A) It will not fit because the notch position and pin count are different
B) It will work at reduced speed
C) It will cause permanent motherboard damage
D) It will need BIOS updates to function
,5. A technician is asked to set up a RAID 1 array on a server. What is the main advantage of
RAID 1?
✅ A) It provides data redundancy by mirroring data across two drives
B) It improves performance but not redundancy
C) It uses striping with parity
D) It requires at least three drives
6. A user’s laptop screen is flickering when adjusting the lid angle. What is the most likely
cause?
✅ A) A failing or loose display cable (LVDS/eDP cable)
B) A corrupted graphics driver
C) The hard drive is failing
D) The Wi-Fi antenna is broken
7. When replacing a power supply (PSU) in a desktop computer, which key factor must be
considered?
✅ A) Wattage rating and correct connector compatibility (ATX, 24-pin, PCIe, SATA)
B) The color of the PSU casing
C) The speed of the fans
D) Whether it has a Wi-Fi adapter
8. Which of the following connection types is used to provide digital audio/video signals and
supports HDCP (High-bandwidth Digital Content Protection)?
A) VGA
B) DVI-A
✅ C) HDMI
D) RJ-45
9. A user complains that their wireless network is slow. The office Wi-Fi runs on 2.4 GHz and is
experiencing interference from cordless phones. What is the best solution?
✅ A) Switch to a 5 GHz band to avoid interference and improve speed
B) Replace all phones with wired models
C) Install a second router on the same channel
D) Disable WPA2 encryption
,10. Which type of printer uses a powder-based consumable and a fuser assembly?
A) Inkjet printer
✅ B) Laser printer
C) Thermal printer
D) Impact printer
11. What is the primary purpose of a UPS (Uninterruptible Power Supply)?
✅ A) To provide backup power and protect against power surges or brownouts
B) To improve CPU performance
C) To cool the system
D) To boost Wi-Fi signal
12. A technician is installing an M.2 NVMe SSD. Which interface provides the highest speed?
A) SATA III
✅ B) PCIe Gen 4
C) USB 3.0
D) Thunderbolt 1
13. Which tool is most appropriate for removing dust from inside a desktop PC without causing
static damage?
✅ A) A can of compressed air (held upright)
B) A household vacuum cleaner
C) A damp cloth
D) A steel brush
14. A company wants to secure laptops with a physical locking mechanism. Which port or slot is
designed for this purpose?
✅ A) Kensington lock slot
B) HDMI port
C) RJ-45 jack
D) SD card slot
15. What is the maximum length for a single Cat6 Ethernet cable run before signal degradation is
expected?
A) 50 meters
✅ B) 100 meters (328 feet)
, C) 250 meters
D) 500 meters
16. A technician is configuring BIOS to enable virtualization for a new hypervisor setup. Which
setting must be enabled?
✅ A) Intel VT-x or AMD-V support
B) PXE boot
C) Secure Boot
D) Legacy USB support
17. A user reports frequent paper jams in a laser printer. What is the most common cause?
✅ A) Worn pickup rollers or using incorrect paper weight/type
B) A damaged fuser
C) Low toner level
D) A faulty network cable
18. A desktop system is not posting and emits 3 long beeps repeatedly. What should be your first
troubleshooting step?
✅ A) Check the motherboard manual for POST beep code meanings, likely indicating faulty
RAM
B) Replace the hard drive
C) Reinstall Windows
D) Reset the user password
19. Which of the following is a secure replacement for Telnet?
A) FTP
✅ B) SSH (Secure Shell)
C) SNMP
D) HTTP
20. A user’s laptop will not connect to any Wi-Fi networks. The wireless adapter is enabled, and
drivers are up to date. What is the next best troubleshooting step?
✅ A) Check if the hardware wireless switch or function key is turned on
B) Replace the router
C) Change the hard drive
D) Reinstall Windows
1102) – Practice Test (Questions 1–200) | Extracted from
different exams
1. You are troubleshooting a desktop PC that randomly shuts down after 10–15 minutes of use.
The system’s internal fans are running slowly, and you suspect overheating. Which is the most
appropriate first step?
✅ A) Open the case, check for dust buildup, and clean the fans and heat sinks
B) Replace the power supply immediately
C) Reinstall the operating system
D) Swap out the CPU
2. A user reports that their Windows laptop takes a very long time to boot and frequently freezes.
A quick check reveals the hard disk is at 98% capacity. What is the most likely cause of this
problem?
✅ A) The drive is nearly full, affecting performance due to limited virtual memory and
fragmentation
B) The CPU is overheating
C) The battery is failing
D) The Wi-Fi adapter is outdated
3. Which of the following is a key advantage of using SSDs (Solid-State Drives) compared to
HDDs?
✅ A) Faster read/write speeds with no moving parts, resulting in lower latency and better
durability
B) They cost less per gigabyte
C) They have unlimited write cycles
D) They require defragmentation
4. You are upgrading a PC and need to install additional RAM. The motherboard supports DDR4
memory. What will happen if you attempt to install a DDR3 module?
✅ A) It will not fit because the notch position and pin count are different
B) It will work at reduced speed
C) It will cause permanent motherboard damage
D) It will need BIOS updates to function
,5. A technician is asked to set up a RAID 1 array on a server. What is the main advantage of
RAID 1?
✅ A) It provides data redundancy by mirroring data across two drives
B) It improves performance but not redundancy
C) It uses striping with parity
D) It requires at least three drives
6. A user’s laptop screen is flickering when adjusting the lid angle. What is the most likely
cause?
✅ A) A failing or loose display cable (LVDS/eDP cable)
B) A corrupted graphics driver
C) The hard drive is failing
D) The Wi-Fi antenna is broken
7. When replacing a power supply (PSU) in a desktop computer, which key factor must be
considered?
✅ A) Wattage rating and correct connector compatibility (ATX, 24-pin, PCIe, SATA)
B) The color of the PSU casing
C) The speed of the fans
D) Whether it has a Wi-Fi adapter
8. Which of the following connection types is used to provide digital audio/video signals and
supports HDCP (High-bandwidth Digital Content Protection)?
A) VGA
B) DVI-A
✅ C) HDMI
D) RJ-45
9. A user complains that their wireless network is slow. The office Wi-Fi runs on 2.4 GHz and is
experiencing interference from cordless phones. What is the best solution?
✅ A) Switch to a 5 GHz band to avoid interference and improve speed
B) Replace all phones with wired models
C) Install a second router on the same channel
D) Disable WPA2 encryption
,10. Which type of printer uses a powder-based consumable and a fuser assembly?
A) Inkjet printer
✅ B) Laser printer
C) Thermal printer
D) Impact printer
11. What is the primary purpose of a UPS (Uninterruptible Power Supply)?
✅ A) To provide backup power and protect against power surges or brownouts
B) To improve CPU performance
C) To cool the system
D) To boost Wi-Fi signal
12. A technician is installing an M.2 NVMe SSD. Which interface provides the highest speed?
A) SATA III
✅ B) PCIe Gen 4
C) USB 3.0
D) Thunderbolt 1
13. Which tool is most appropriate for removing dust from inside a desktop PC without causing
static damage?
✅ A) A can of compressed air (held upright)
B) A household vacuum cleaner
C) A damp cloth
D) A steel brush
14. A company wants to secure laptops with a physical locking mechanism. Which port or slot is
designed for this purpose?
✅ A) Kensington lock slot
B) HDMI port
C) RJ-45 jack
D) SD card slot
15. What is the maximum length for a single Cat6 Ethernet cable run before signal degradation is
expected?
A) 50 meters
✅ B) 100 meters (328 feet)
, C) 250 meters
D) 500 meters
16. A technician is configuring BIOS to enable virtualization for a new hypervisor setup. Which
setting must be enabled?
✅ A) Intel VT-x or AMD-V support
B) PXE boot
C) Secure Boot
D) Legacy USB support
17. A user reports frequent paper jams in a laser printer. What is the most common cause?
✅ A) Worn pickup rollers or using incorrect paper weight/type
B) A damaged fuser
C) Low toner level
D) A faulty network cable
18. A desktop system is not posting and emits 3 long beeps repeatedly. What should be your first
troubleshooting step?
✅ A) Check the motherboard manual for POST beep code meanings, likely indicating faulty
RAM
B) Replace the hard drive
C) Reinstall Windows
D) Reset the user password
19. Which of the following is a secure replacement for Telnet?
A) FTP
✅ B) SSH (Secure Shell)
C) SNMP
D) HTTP
20. A user’s laptop will not connect to any Wi-Fi networks. The wireless adapter is enabled, and
drivers are up to date. What is the next best troubleshooting step?
✅ A) Check if the hardware wireless switch or function key is turned on
B) Replace the router
C) Change the hard drive
D) Reinstall Windows
