Practice questions are the single highest-ROI study activity for any certification exam. They calibrate your readiness, surface knowledge gaps faster than reading, and acclimate you to question phrasing. But quality varies wildly, and paid practice banks often duplicate free material with a higher price tag.
This article points you to genuinely free, vendor-aligned practice questions for the most in-demand 2026 certifications — including newly added cert vendors on this platform: CompTIA, HashiCorp, Linux Foundation (CNCF), GitHub, ServiceNow, and Mirantis.
Why Practice Questions Matter
| Study activity | Retention after 1 week |
|---|---|
| Reading documentation | ~10% |
| Watching video courses | ~20% |
| Hands-on lab practice | ~75% |
| Active recall via practice questions | ~80% |
Numbers from cognitive-science learning research consistently rank active recall and spaced retrieval as the highest-leverage learning activities. Practice exams operationalise both.
Kubernetes & Cloud Native (CNCF)
For KCNA, CKAD, CKA, KCSA, and other CNCF certs:
- The Linux Foundation's own training pages include sample questions for each exam
- The killer.sh simulator (included free with every CNCF cert purchase) provides two attempts of the closest-to-real exam environment
- The official curriculum repos on GitHub include practice exercises (e.g.,
cncf/curriculum) - This platform's free practice questions: /vendors/linux-foundation
CompTIA (A+, Network+, Security+, Linux+, Cloud+, CySA+, PenTest+, SecAI+)
- CompTIA's own CertMaster Practice trial is free for the first 25 questions
- Professor Messer publishes free practice exams alongside his (also free) video courses for Security+, Network+, and A+
- The NIST and CISA glossary documents help with terminology questions
- This platform's free practice questions: /vendors/comptia
HashiCorp (Terraform, Vault, Consul, Boundary)
- HashiCorp's official documentation includes exam objectives and sample questions per cert
- HashiCorp Learn (learn.hashicorp.com) is the canonical free tutorial set; every tutorial maps to exam objectives
- The Terraform Registry itself is a great source of "real-world" module patterns the exam draws from
- This platform's free practice questions: /vendors/hashicorp
GitHub (Foundations, Actions GH-200, Advanced Security GH-500, Admin GH-300)
- GitHub's certification site (examregistration.github.com) lists exam objectives
- The GitHub Docs site is the definitive source — every exam question maps to a documented behaviour
- Microsoft Learn paths for GitHub provide some practice content
- This platform's free practice questions: /vendors/github
ServiceNow (CSA, CAD, CIS family)
- The free ServiceNow Personal Developer Instance is the best practice tool — you can replicate any exam scenario in your own instance
- ServiceNow Learning (formerly Now Learning) contains free knowledge checks at the end of each module
- The ServiceNow Community has user-contributed practice question threads
- This platform's free practice questions: /vendors/servicenow
Mirantis Docker Certified Associate (DCA)
- Mirantis publishes the official DCA Study Guide as a free PDF on training.mirantis.com
- The Docker documentation is the definitive reference for exam objectives
- Play with Docker provides free in-browser Docker hosts to practice the orchestration scenarios
- This platform's free practice questions: /vendors/mirantis
How to Use Practice Questions Effectively
1. Diagnostic first, study second
Take an untimed practice set before studying. The pattern of gaps tells you which exam domains need the most study time. This avoids spending equal time on topics you already know.
2. Review every wrong answer in depth
For each missed question, write a short note explaining (a) why the right answer is right, and (b) why each wrong answer is wrong. Building this discriminator skill is what separates 70% performers from 90% performers.
3. Simulate the timed exam at least twice
Run two full-length, timed, no-distractions practice exams within the week before your real test. Time pressure is the #1 reason candidates underperform their study performance.
4. Don't memorise the practice question bank
If you find yourself recognising questions instead of working through them, switch banks. Pattern-matching practice questions is a known anti-pattern that breaks down on the real exam.
What Makes Practice Questions "Good"
| Quality signal | What to look for |
|---|---|
| Explanations | Every question explains why the right answer is right AND why others are wrong |
| Currency | Updated for the current exam version (e.g., SY0-701 not 601, TA-004 not 003) |
| Difficulty range | Mix of recall, application, and scenario; not all easy or all trick |
| Scenario depth | Real-world wording mirrors actual exam style |
| Coverage | Distribution matches the exam blueprint weights |
The Free vs Paid Trade-off
Free practice question sources are sufficient to pass most exams if you use them rigorously. Paid banks add value when:
- The cert is very new and free banks haven't caught up (e.g., GH-500, CNPA)
- You want exam-day simulation specifically (killer.sh for CNCF exams)
- You're targeting 90%+ on the first attempt and need higher question volume
For everyone else, free practice — supplemented by hands-on lab work — is enough. Spending $300 on a question bank for a $99 exam is rarely the right allocation.
Start Practising Now
The newest vendor cert categories on this platform — covering CompTIA, HashiCorp, Linux Foundation, GitHub, ServiceNow, Mirantis, and others — all offer free practice questions aligned to the current exam objectives. Pick the cert you're targeting and start a session:
- CompTIA practice questions
- CNCF / Linux Foundation practice questions
- HashiCorp practice questions
- GitHub certification practice questions
- ServiceNow practice questions
- Mirantis DCA practice questions
Pair them with the certification roadmaps to sequence your study plan, and you have everything you need to certify across the most in-demand vendor stacks in 2026 — without spending a cent on practice material until you genuinely need to.