Certification practice — free, in your browser
Cert Master is an unofficial study tool for AWS, Microsoft Azure, Google Cloud, and CompTIA certifications: original practice questions aligned to official exam guides, each with links to vendor documentation. Includes domain-weighted exams, progress dashboards, and CompTIA acronym drills. No account or install required.
How to use Cert Master
- Pick a certification from Browse certifications in the menu or on the home page.
- Review exam domains and optional settings in the menu (timer, feedback on Next, doc links).
- Start a practice exam — each attempt draws a new random set weighted like the official exam guide.
- Submit and review your score, domain breakdown, study plan, flagged questions, and drill mode for weak topics.
- Track progress on the dashboard; export or clear your data under My data in the menu.
- CompTIA only: use Study acronyms on the exam page to drill abbreviations both ways before a full practice test.
Progress is saved in this browser only. Use Export backup before switching devices. Questions are original practice items aligned to official exam objectives—not copied from real certification exams.
KeyTrain
Cybersecurity training across ten domains—identity, email, data protection, endpoint, network, and more. Expand a section below to start training, join a workshop, or take a formal certification exam.
Training
Practice exams in study mode—optional feedback, pause & resume, and progress tracking. For guided lessons, use Workshops below (Easy, Medium, or Hard).
Workshops
Pick a category, then choose Easy (thorough core concepts in plain language), Medium (workplace scenarios), or Hard (advanced technical drills).
Certification
Timed pass/fail assessments with no feedback until you submit. Pass to unlock a PDF certificate. Unlike Practice certifications on the browse page, these are single-attempt formal exams.
Cybersecurity domains
Cloud & vendor certifications
Workshops
Each category offers three levels with interactive diagrams—step-through flows, compare panels, clickable hotspots, and ordering drills that teach the how and why, not just text. Easy for first-time learners, Medium for workplace practice, Hard for advanced scenarios.
All workshop categories
KeyTrain Certification
Assessment rules
Results
0 / 1000
Review answers and core concepts
Learn from each item: correct answers, explanations, and the core idea for that topic area.
KeyTrain results are based on this site's practice question bank. They are not official vendor certification exams.
Your KeyTrain certificate
Enter the name exactly as it should appear on your PDF certificate, then download or print.
Practice certifications
Search or scroll to pick an exam. Each opens a page with domains, practice tests, and progress for that certification.
No exams match your search. Try a shorter keyword or clear the search box.
KeyTrain (practice) (0)
Cybersecurity scenarios: identity, email, data protection, endpoint, network, and more. Also available from the KeyTrain hub (training, workshops & certification).
AWS certifications (0)
Microsoft Azure certifications (0)
Google Cloud certifications (0)
CompTIA certifications (0)
Includes acronym study on each exam page.
AWS Certified Cloud Practitioner
CLF-C02
Each attempt draws random questions from the bank using official exam domain weights. You can pause and resume within a week. No account required.
CompTIA acronym prep
CompTIA exams use heavy shorthand (ports, protocols, roles, attacks). Our acronym quiz trains both directions—term to meaning and meaning to term—so stems on the real exam feel familiar.
Exam domains
Acronym study
Start with KeyTrain — all categories for the big picture, then pick a category to drill into workshops and practice scores.
Your progress
Results
0 / 1000
Performance by domain
Scores are approximated from practice answers and are not official exam results. Questions are original study items aligned to vendor exam guides—not copied from real certification exams. Reference links point to official provider documentation.
Flagged for review
Questions you marked during the exam, with correct answers and explanations.
Personalized study plan
Based on domains where you scored below 70%, these official AWS training and documentation links can help you improve.
Study plan links point to official AWS, Microsoft Learn, Google Cloud, or CompTIA resources. Verify URLs remain current before your exam date.