Most people who fail CompTIA A+ fail it a specific way. They watch Professor Messer videos for six weeks, feel confident, sit the exam — and get blindsided by Core 2 domain 4, the “Operational Procedures” domain that covers professionalism, change management, and documentation. Nobody studies that domain. Everyone loses points on it. Here’s how to not be that person.
Understand what you’re actually being tested on
Core 1 (220-1101) covers mobile devices, networking basics, hardware, virtualization, and hardware troubleshooting. It’s the more technical of the two exams and the one candidates feel more prepared for. Core 2 (220-1102) covers operating systems, security, software troubleshooting, and — the part that trips people up — operational procedures. That last domain includes professionalism (how you talk to users), change management (documenting what you changed and why), environmental controls, and privacy concepts. It’s soft by tech standards and consistently undersupplied in most study plans.
Phase 1: Content coverage
Professor Messer’s free A+ course at professormesser.com remains the gold standard for free study material. Watch all of it. Don’t try to memorize — try to understand how things connect. The first pass through the material is about building familiarity, not retention. Complement with the Mike Meyers study guide or the CompTIA official book if you learn better from text than video. Budget three to four weeks for Core 1 content, three weeks for Core 2.
Phase 2: Practice tests — this is where most people under-invest
Practice tests are the actual core of A+ preparation. They’re not supplementary. Watching videos builds comprehension. Practice tests reveal where your comprehension breaks down under time pressure and unfamiliar question framing — which is exactly what the real exam measures.
Professor Messer’s practice exams ($10–$15 per set) are closest to real exam difficulty and worth the cost. Jason Dion’s practice tests on Udemy (frequently on sale for $12) are high volume and have good answer explanations — the explanations are as important as the questions. Aim to be consistently scoring 85% or above before scheduling.
Scoring 75% on practice tests and booking your exam anyway is how people pay for two attempts instead of one. The practice test score is information. Use it.
Phase 3: Performance-based questions
Both exams include performance-based questions — simulations where you configure a network setting, identify components in a diagram, or troubleshoot a scenario in a virtual environment. These can’t be guessed or skimmed. The strategy: flag performance-based questions at the start of the exam, complete all multiple-choice first, then return to PBQs with remaining time. And practice hands-on tasks in a real or virtual lab before exam day — PBQs reward familiarity with the actual actions, not just the concepts.
When to schedule
When you’re consistently scoring 85% or above across the full domain range, including Operational Procedures. If you’re not there yet, another two weeks of focused study in your weak domains is a better investment than a retake fee.
In Texas, through the Infotech Academy Pre-Apprenticeship Program, A+ training and exam costs are covered for eligible residents. If you’re in the PAP, your program structure gives you the accountability and support that self-study lacks — which matters for completing Core 2 preparation fully rather than rushing to sit the exam before you’re ready.