Stuxivo
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Know why you got it wrong.

— before the real exam, not after

Import your own questions, generate realistic practice exams, and get AI marking that explains every mistake — grounded in your materials.

Start practicing freeSee how it works

Specimen paper · Learn mode · untimed

Marks: 0/3

Question 1 of 3

AWS · Cloud certification

Which AWS service provides a fully managed NoSQL key-value database?

Which AWS service provides a fully managed NoSQL key-value database?

From a pile of questions to a marked paper

Stuxivo is the practice layer for questions you already have. Four steps, no busywork.

  1. 1.Create a Space

    A Space is a private study area for one subject — its own question bank, tags, sources, and progress. Biology and AWS never mix.

    Space

    Biology Finals

    e.g. 240 questions · 8 tags · 2 sources

  2. 2.Bring your questions

    Write them by hand or import JSON in bulk. Every import is validated and previewed before anything is saved, and questions are versioned from day one.

    {
  "prompt": "Which service provides...",
  "options": ["RDS", "DynamoDB", ...],
  "answer": 1,
  "tags": ["storage", "databases"]
}

    Validated on import · preview before commit

  3. 3.Generate a weighted exam

    Tell Stuxivo the shape of the real exam and it selects questions to match — random, or weighted by topic tags.

    Generation rule · 60 questions

    Cell Biology
    40%
    Genetics
    30%
    Ecology
    20%
    Review
    10%

  4. 4.Sit it your way

    Two modes, chosen at the start of every attempt — and your answers autosave either way.

    Learn mode

    Feedback right after each submitted question. No timer, skip freely, come back later.

    Test mode

    Exam-real. Optional server-enforced countdown, and nothing is revealed until you submit the whole paper.

What are you preparing for?

Pick your seat. The mechanics are the same everywhere — your questions, realistic practice, explained mistakes.

Turn your question pile into a study system

You already have hundreds of practice questions in JSON. Paste them in, generate weighted mock exams that match the real blueprint, and drill against a server-enforced clock.

  • Bulk JSON import with validation and preview
  • Weighted generation matched to the exam blueprint
  • Timed Test mode with autosave and refresh recovery

Mock exam · AWS Solutions Architect

70 questions · timed 130:00 · generated from your bank

Q41 — A company needs sub-millisecond reads for session data. Which service fits?

You picked RDS again — session stores want ElastiCache. See the pattern?

Marking that teaches

A score tells you that you failed a question. Stuxivo's AI tells you why — why the right answer is right, and why every other option is wrong.

Explain with AI

streams live · cites its sources

Q17 — Which statement about AWS security groups is TRUE?

Your answer: C — “Security groups are stateless.”

Why B is correct: Security groups are stateful — return traffic for an allowed request is automatically allowed, with no explicit inbound rule needed.1

Why C is wrong: Stateless filtering is how network ACLs behave. Confusing the two is the classic VPC exam trap.2

1 your-notes.pdf — p. 12, “VPC security layers” (your uploaded source)

2 AWS VPC documentation (search-grounded citation)

  • Grounded in your materials

    Link a PDF source to a question and the explanation is built from your document — and cites it. No source? It answers from general knowledge and says so.

  • One action, streamed live

    One “Explain with AI” button. The explanation streams in as it's written, and Explore Further lets you dig deeper into the same question.

  • Explanations that get reused

    Prepared explanations are generated once by the quiz owner — then every learner who meets that question reads the same vetted answer, free.

AI explanations are available in English, Turkish, Spanish, German, French, and Italian.

Your score report

Every attempt feeds a per-Space report: accuracy by tag, score trends over time, and practice tracked separately from real test scores.

Learn and Test histories never mix — practice stays practice, and your mock-exam scores stay honest.

Score report · Biology Final

example data

Accuracy by tag

Cell Biology
84%
Genetics
58%
Ecology
71%
Lab Skills
92%

Genetics is where the marks leak. Start there.

Test scores over time

attempt 1attempt 6

Six timed mocks, scored on submit. The trend is the point.

Choose your plan

Start free with your own question bank. Upgrade when you want AI marking and more capacity.

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Frequently asked

What do I get on the Free plan?

The full practice loop: Spaces, question banks, JSON import, quiz generation, Learn and Test modes, progress analytics, and public sharing — no credit card required. After email verification, Free also includes 20 one-time welcome AI credits valid for 14 days. Prepared explanations attached by a quiz owner remain free to read.

How do AI credits work?

Free includes 20 one-time welcome AI credits, valid for 14 days after email verification. Plus and Educator include a monthly allowance that resets each month. Requesting an AI explanation or an Explore Further deep-dive spends credits; reading a prepared explanation someone already generated costs nothing.

Can I cancel anytime?

Yes. You can cancel your subscription at any time from your account — no phone calls, no forms.

What about refunds?

Stuxivo has a published refund policy — you'll find it linked in the footer. If something went wrong with your purchase, write to support@stuxivo.com and we'll sort it out.

Who owns my questions and materials?

You do. Your question banks, sources, and results are yours. Private Spaces stay private, and content is only visible to others when you explicitly share a quiz. The privacy policy has the details.

You may begin.

Create a free account, make your first Space, and sit a paper built from your own questions — today.

Start practicing free