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    04 · Concept

    MVCC (multi-version concurrency control)

    A 20-minute report reads every UPI wallet. Why don’t payments freeze?

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    1. 60-second story 9 cards · 1 minOne idea per card. Tap through it like stories.(done)
    2. Quick check 3 questions · 1 minTap an answer, get instant feedback.(done)
    3. Go deeper 5 min2 build-up diagrams and 3 “you’re the candidate” moments.(done)
    4. Full breakdown 18 min · 4 figuresThe complete breakdown, every number and figure.(done)

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