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CompTIA A+ — Practice Questions, Core 1 flashcards

6 of 65 questions free to study here · 5 topics · the whole deck is built into Willys

Multiple-choice practice questions, one best answer each, on mobile devices, ports and protocols, Wi-Fi, IP addressing, cables, PC hardware, printers, virtualization and troubleshooting.

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Practice deck · part of CompTIA A+ · written against: Core 1 (220-1201) and Core 2 (220-1202) exam objectives. Updated 2026-10-10.

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  1. A customer asks for more memory in a laptop whose existing RAM sits in a removable slot, not soldered to the board. Which module should the technician order?

    A) A SO-DIMM of the same DDR generation
    B) An ECC DIMM matching the laptop's speed
    C) A SO-DIMM of the next DDR generation up
    D) A full-size DIMM of the same DDR generation
    A) A SO-DIMM of the same DDR generation

    Laptops use the short SO-DIMM form factor, and the module must match the board's DDR generation because generations are not interchangeable. A full-size DIMM is the desktop form factor and will not fit.
    Mobile Devices › Laptop Hardware
  2. A user reports that her laptop's case has started to bulge and the touchpad is being pushed upward. What should the technician do?

    A) Power it off and remove the swollen battery
    B) Reseat the touchpad in its mounting bracket
    C) Run it on AC power only until a fix arrives
    D) Recalibrate the battery with a full discharge
    A) Power it off and remove the swollen battery

    A bulging case points to a swollen lithium-ion battery, which can overheat and catch fire. Remove it carefully without puncturing it and recycle it as hazardous waste; keeping the laptop in use on AC power leaves the damaged cell in place.
    Mobile Devices › Laptop Hardware
  3. An administrator needs an encrypted command-line session to a Linux server through the firewall. Which port must be allowed?

    A) TCP 3389
    B) TCP 21
    C) TCP 22
    D) TCP 23
    C) TCP 22

    SSH uses TCP 22 and encrypts the whole session. Telnet on TCP 23 also gives a command line but sends everything, including passwords, in cleartext.
    Networking › Ports and Protocols
  4. A conference room projector has only a VGA input, and the presenter's laptop has only an HDMI port. What is needed to connect them?

    A) A passive HDMI-to-VGA cable
    B) An active HDMI-to-VGA converter
    C) A DisplayPort MST hub
    D) A passive DVI-D to VGA adapter plug
    B) An active HDMI-to-VGA converter

    HDMI is digital and VGA is analog, so the signal must be converted by an active adapter. A passive cable only rewires pins and cannot do digital-to-analog conversion.
    Hardware › Cables and Connectors
  5. A hypervisor on a new PC refuses to start any 64-bit virtual machine. Which setting should be checked first?

    A) The VM's adapter set to NAT
    B) TPM 2.0 in the firmware
    C) Intel VT-x or AMD-V in the firmware
    D) Secure Boot in the UEFI firmware settings
    C) Intel VT-x or AMD-V in the firmware

    64-bit guests need hardware-assisted virtualization, which is switched on in UEFI/BIOS as Intel VT-x or AMD-V. Secure Boot controls which bootloaders may run and does not enable virtualization.
    Virtualization and Cloud Computing › Virtualization
  6. A technician's test confirms that a loose cable caused the fault. According to the troubleshooting methodology, what should be done next?

    A) Document findings, actions and outcomes
    B) Verify full system functionality
    C) Establish a plan of action and implement it
    D) Establish a new theory or escalate the issue
    C) Establish a plan of action and implement it

    Once the theory is confirmed, the next step is to establish a plan of action and implement the solution. Verifying functionality follows the fix, and documentation is the final step.

    Not in the CompTIA A+ 2026 outline; background only.
    Hardware and Network Troubleshooting › Troubleshooting Methodology

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Hardware and Mobile DevicesNetworking and TroubleshootingOperating SystemsSecurity and Operational ProceduresPractice Questions, Core 2

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About these cards

Review status: Second-reader reviewed, with corrections applied.

Checked against:

  • Checked against vendor documentation from the USB Implementers Forum, PCI-SIG, JEDEC and Microsoft Learn (reference only; no text copied).
  • Checked against the IANA Service Name and Transport Protocol Port Number Registry (public) and RFC 1918 and RFC 3927 for private and link-local addressing (reference only; no text copied).
  • Checked against IEEE 802.11 and 802.3 standard summaries and the TIA-568 cabling standard summaries (reference only; no text copied).
  • Checked against vendor and standards documents: Intel's ATX Version 3 Multi Rail Desktop Platform Power Supply Design Guide (Rev. 2.1a), HP, Dell, Lenovo, NVIDIA and congatec technical documents, NVM Express, CLEAResult (80 PLUS), CommScope and Fluke Networks on TIA TSB-155, ETSI TS 123 003, the GSMA Block List Services Description, the UK Home Office mobile-theft paper, the NIST CSRC Glossary, the Bluetooth SIG and Apple Support, and NIST Technical Note 1291, UL, Extron, Southwire and Mike Holt (EC&M) on plenum cable and raceways (reference only; no text copied).
  • CompTIA A+ exam objectives 220-1201 V15 and 220-1202 V15, Exam Objectives Document Version 4.0 (topic outline only; no text copied)

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