Free CompTIA A+ Practice Test 2026 — 20 Questions, No Signup Required

What is the maximum theoretical data transfer speed of USB 3.0 (USB 3.1 Gen 1)?

Which connector type does DDR4 desktop RAM use?

What does POST stand for, and when does it occur?

Which subnet mask corresponds to a /24 network in CIDR notation?

What is the primary function of the CMOS battery on a motherboard?

Which RAID level stripes data with parity across multiple drives, providing both read performance and single-drive fault tolerance, and requires a minimum of 3 drives?

Which display connector type transmits an analog video signal and is commonly found on legacy monitors and projectors?

Which command-line tool tests basic network connectivity by sending ICMP echo request packets to a target host?

What maximum resolution can HDMI 2.0 support at 60 Hz?

Which Windows command-line tool displays the IP address, subnet mask, and default gateway for all network adapters?

What interface does an M.2 NVMe SSD use for data transfer, and why is it faster than a SATA SSD?

What does ESD stand for, and why is it a concern when working inside a computer?

Which network protocol automatically assigns IP addresses, subnet masks, default gateways, and DNS server addresses to client devices?

A laptop screen is extremely dim, but you can faintly see a Windows desktop when you shine a flashlight at it from an angle. What is the most likely cause?

Which Windows utility scans a drive for file system errors and bad sectors, and can attempt to repair them?

Which port does HTTPS use by default?

What is a Blue Screen of Death (BSOD) in Windows?

What is the correct procedure before removing a USB flash drive from a Windows computer?

What is the primary purpose of Windows Task Manager?

Which Wi-Fi standard was the first to operate on BOTH the 2.4 GHz and 5 GHz frequency bands (dual-band)?