CompTIA Tech+ Exam Review - 10.20.2025

You’re helping your friend set up their gaming PC, but it won’t start. The motherboard light turns on, but there’s no display or sound. What’s the first thing you should check?

• Replace the hard drive

• Update the BIOS

• Check if the RAM is properly seated

• Install a new GPU

• Replace the power supply

Answer explanation

Poorly seated RAM often causes systems to power on without booting properly. Always check connections first!

Liam is working in the office and tells you that his computer “isn’t connecting to Wi-Fi.” You notice the Wi-Fi icon has an “X” on it. What’s your best first move?

• Replace the router

• Reinstall the operating system

• Update the network card driver

• Reset the TCP/IP stack

• Check if the Wi-Fi is turned on

Answer explanation

Always start simple! If Wi-Fi is disabled, no connection will occur.

During long Zoom calls, Noah notices that his computer keeps shutting down randomly. What’s the most likely cause?

• Malware

• Overheating

• Faulty SSD

• Outdated browser

• Insufficient RAM

Answer explanation

Long calls stress the CPU; overheating triggers auto-shutdown to prevent damage.

Emma is helping set up a new database for her school. She needs to choose the best primary key for identifying students. Which field should she select?

• First Name

• Last Name

• Student ID

• Grade Level

• Class Name

Answer explanation

A primary key must be unique—Student ID fits that perfectly.

During a thunderstorm, your office loses power, but your computer stays on for 5 minutes before shutting down. What saved it?

• Surge protector

• Generator

• UPS

• Power inverter

• Power strip

Answer explanation

UPS provides short-term power backup during outages.

Your team shares files via a local network folder, but one user can’t see the shared drive. Others can. What should you check first?

• DNS server settings

• Network permissions

• The router’s firewall

• Static IP conflicts

• Windows version

Answer explanation

Permissions control access to shared resources.

William is helping his friend fix a computer. He points to the keyboard, monitor, and motherboard and says, "These are examples of hardware." What does William mean by hardware?

• The physical components of the computer

• The games and programs we use on the computer

• The product we create on the computer

• The computer

• The code that controls the OS

Jackson is at a computer store upgrading his PC. He picks up several components, as shown in the picture. What do these components illustrate?

• Desktop tower

• Motherboard

• Hard Disk Drive (HDD)

• RAM

• PSU

Grace is trying to print her report, but her printer keeps printing random symbols like “#@!@” instead of the actual content. Why is this happening?

• Depleted ink

• Wrong printer driver installed

• Paper jam

• Malware infection

• Printer overheating

Answer explanation

Incorrect drivers confuse the printer with unreadable commands.

Michael runs a small business and wants to let guests use Wi-Fi but keep them off his business network. What feature should he enable?

• Guest network

• Port forwarding

• Static IPs

• MAC filtering

• VPN tunnel

Answer explanation

Guest networks isolate users from internal systems.