PassSpark

CompTIA A+ Core 1 2025 past questions and answers

This 2025 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 2025 set with instant marking.

Practise the full 2025 setTimed exam mode

Sample CompTIA A+ Core 1 2025 questions

1. A user reports that a smartphone's battery drains rapidly after a recent trip. The phone is not in use, and its cellular signal indicator shows one bar. Which action is most likely to reduce the drain while preserving the ability to use Wi-Fi?
  1. Enable airplane mode and then turn Wi-Fi back on
  2. Increase screen brightness to maximum
  3. Enable NFC and Bluetooth scanning
  4. Force the phone to use the cellular network's highest data rate

Answer: A. Enable airplane mode and then turn Wi-Fi back on

A weak cellular signal can make a phone use more power as it searches for or maintains service. Airplane mode disables the cellular radio, and Wi-Fi can be enabled separately; increasing brightness or enabling more radios would not address the cause.

2. A phone can browse websites over Wi-Fi, but its mobile data service does not work. The SIM is recognized and the account is active. Which setting should the technician check first for cellular data configuration?
  1. The device's screen timeout
  2. The access point name (APN)
  3. The Wi-Fi channel width
  4. The phone's NFC pairing list

Answer: B. The access point name (APN)

The APN provides the carrier-specific settings needed for packet data over the cellular network. Screen timeout, Wi-Fi channel width, and NFC settings do not configure mobile data access.

3. A small office wants wireless coverage on a second floor. There is an Ethernet run from the existing switch to that floor, and users should remain on the same LAN. Which device is the best fit at the second-floor location?
  1. A modem operating as a standalone WAN gateway
  2. A layer 3 switch configured for inter-VLAN routing
  3. A wireless access point connected to the Ethernet run
  4. A network-attached storage device

Answer: C. A wireless access point connected to the Ethernet run

An access point extends Wi-Fi onto the existing wired LAN. A standalone modem or NAS does not provide the requested wireless access, and layer 3 routing is unnecessary when clients should stay on the same LAN.

4. A workstation has the address 169.254.18.42/16 and cannot reach its gateway. Which is the most likely explanation?
  1. The workstation has received a valid public address from its ISP
  2. The workstation's DHCP request did not receive a lease, so it self-assigned an APIPA address
  3. The DNS server has assigned an IPv6 link-local address
  4. The workstation is using a static address reserved for loopback testing

Answer: B. The workstation's DHCP request did not receive a lease, so it self-assigned an APIPA address

The 169.254.0.0/16 range is used for IPv4 link-local/APIPA self-assignment when a DHCP lease cannot be obtained. It is not a public ISP address, IPv6 address, or loopback range.

5. A network administrator needs to allow secure web traffic through a firewall while blocking unencrypted web traffic. Which destination TCP port should be allowed for secure web browsing?
  1. 21
  2. 25
  3. 80
  4. 443

Answer: D. 443

HTTPS normally uses TCP port 443. TCP 80 is HTTP, 21 is FTP control, and 25 is SMTP.

More CompTIA A+ Core 1 years

2026202420232022

All CompTIA A+ Core 1 years · CompTIA subjects

PassSpark questions are original practice questions written to each exam's syllabus and format, in the style of past questions. They are not official past papers and are not affiliated with JAMB, WAEC, NECO, any university or any exam body.