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CompTIA A+ Core 1 2022 past questions and answers

This 2022 CompTIA A+ Core 1 set has 20 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2022 set with instant marking.

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Sample CompTIA A+ Core 1 2022 questions

1. A technician finds a laptop battery that is visibly swollen and has lifted the touchpad. What should the technician do first?
  1. Press the battery flat so the touchpad can be reinstalled
  2. Puncture the battery to release the trapped gas
  3. Power down the laptop, disconnect it from power, and follow the approved swollen-battery handling procedure
  4. Continue using the laptop while monitoring the battery percentage

Answer: C. Power down the laptop, disconnect it from power, and follow the approved swollen-battery handling procedure

A swollen lithium-ion battery is a fire and chemical hazard, so the device should be powered down and the battery handled under the organization's safe disposal procedure. Pressing or puncturing it can cause thermal runaway; continued use is unsafe.

2. A user reports that a Windows 2-in-1 laptop's touch input lands slightly away from the point touched, while a connected mouse works normally. Which action is most appropriate?
  1. Recalibrate the touchscreen
  2. Replace the laptop's wireless adapter
  3. Change the display resolution to the lowest setting
  4. Replace the mouse

Answer: A. Recalibrate the touchscreen

Touchscreen calibration corrects the mapping between the digitizer's sensed position and the displayed coordinates. A working mouse and offset touch points do not indicate a wireless-adapter or mouse failure.

3. A laptop is close to a dual-band access point in a crowded office. The user prioritizes lower interference and higher throughput over maximum range. Which Wi-Fi band should the technician select?
  1. 2.4 GHz
  2. 5 GHz
  3. 900 MHz
  4. 60 Hz

Answer: B. 5 GHz

The 5 GHz band generally offers more available channels and less interference in a crowded environment, with higher throughput at short range. The 2.4 GHz band typically reaches farther but is more congested.

4. A Windows workstation cannot reach network resources and shows an IPv4 address beginning with 169.254 after startup. What is the most likely explanation?
  1. The workstation received a valid public IPv4 address
  2. The DNS server assigned an address automatically
  3. The workstation is using an IPv6 link-local address
  4. The workstation did not obtain a DHCP lease and assigned itself an APIPA address

Answer: D. The workstation did not obtain a DHCP lease and assigned itself an APIPA address

Windows uses an IPv4 address in the 169.254.0.0/16 APIPA range when it cannot obtain a DHCP lease. DNS resolves names and does not assign IPv4 addresses.

5. A technician must connect two IP subnets and forward traffic between them. Which device is designed for this task?
  1. Unmanaged Ethernet hub
  2. Repeater
  3. Router
  4. Patch panel

Answer: C. Router

A router forwards packets between different IP networks using Layer 3 addressing. A hub or repeater operates without routing between subnets, and a patch panel is passive cabling hardware.

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