50 Questions · 60 Minutes

Test yourself across all five Core 1 domains. See your score and all correct answers after you finish. Detailed explanations follow your plan, including 10 free samples.

• 50 questions: 10 randomly selected from each domain
• 60-minute countdown with automatic submission
• One best answer per question
• Answers revealed after you finish

This sample Mock Test uses equal domain counts. It is independent study practice, not the official CompTIA exam or the Premium Realistic Mock Exam.

Practise at your own pace

Questions are shuffled. Check each answer and read its explanation as you go.

Choose from the 100 selected questions across all five domains. Correct answers are always free; detailed explanations follow your plan.

A strong start. Free for everyone.

• All questions and correct answers for this Core
• Domain-based practice and untimed practice tests
• No daily question limit
• Mock Test: 50 questions · 60 minutes
• Basic results and scores
• 10 sample detailed explanations
• Free app installation

This sample contains 100 questions, 20 per domain, with 10 free detailed explanations. The complete question bank is still being prepared.

All 100 sample questions, correct answers and basic scores are free. Ten detailed explanations are also free samples, with two in each domain.

Included in the planned first release

• Full explanations, including why other answers are incorrect
• Review Wrong Answers and save questions for revision
• Realistic Mock Exam: 90 questions in 90 minutes
• Original performance-based scenarios, flagging and review
• Domain-weighted selection and detailed exam results

Offline study · Premium

Study without an internet connection. Planned for a later release; installing the app itself is free.

Developing progressively

Weak-topic analysis · Personalised revision · Custom tests · Advanced bookmarks · Offline study · Ad-free experience.

Your exam-day rehearsal.

Core 1 · 220-1201 · V15

• 90 mixed-domain questions with a 90-minute timer
• Score and correct answers after completion
• All detailed explanations unlocked for testing

Prototype version: 90 multiple-choice questions selected from the current 100-question bank, with 18 per domain and a 90-minute timer. Performance-based scenarios, flagging and official domain weighting are still planned.

Explore both experiences

Switch the visual preview below. Premium test access is free for everyone in this prototype. It does not purchase Premium or create a paid subscription; reloading returns you to the Free Plan.

Free Plan is active.

Membership & purchases

Account registration, purchase restoration and gifted Premium access will appear here when connected.

Install App

Installation is free. On iPhone, open this app in Safari, tap Share, then Add to Home Screen. On a supported Android or desktop browser, use the browser’s Install App option.

Your practice progress stays in this browser or installed app. Clearing its data removes that progress.

Help & Feedback

Found an issue or have a suggestion? Open the Ideas page to send feedback or ask for help. You can also email admin@rubablu.com.

Please include your device, browser and a description of the issue.

Build Your Confidence with Quick Revision PDFs

We’re preparing free, easy-to-use reference PDFs to support your CompTIA A+ revision:

• Port Numbers & Protocols — revise common ports and what they are used for.
• IT Acronyms — refresh key terms and their meanings.
• Basic Linux Commands — learn useful commands and simple examples.

Use these alongside your practice questions to strengthen your knowledge and approach your exam with more confidence.

PDF downloads are coming soon. These resources will be free; no Premium purchase is required.