• #A
    #B
    #C
    #D
    Explanation:
    When users mint again after the first drop, it shows they see long-term value in the project. Repeat minting is a strong signal of community trust.
  • #A
    #B
    #C
    #D
    Explanation:
    If many proposals are created but few get votes, it signals weak governance participation. Healthy DAOs focus on engagement, not just proposal count.
  • #A
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    #C
    #D
    Explanation:
    Invariants are rules that must always remain true in a contract. Documenting them helps validate whether your core logic stays consistent after every transaction.
  • Difficulty - Medium
    Total Plays - 4
    Allowed Time - 10 sec
    Best time - 3.814 sec

    Why snapshot testing helps?

    Tip: Click "Play" to reveal options and start playing.
    #A
    #B
    #C
    #D
    Explanation:
    Snapshots capture the contract’s state at a moment in time. They help debug failed transactions and compare pre- and post-execution states.
  • Difficulty - Medium
    Total Plays - 5
    Allowed Time - 10 sec
    Best time - 1.616 sec

    Why use modifiers carefully?

    Tip: Click "Play" to reveal options and start playing.
    #A
    #B
    #C
    #D
    Explanation:
    Modifiers improve smart contract readability but can cause hidden logic issues if used carelessly. Always review how each modifier changes access or conditions.
  • #A
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    #C
    #D
    Explanation:
    Logical bugs can’t be found by tools; they require clear understanding of how the business rules actually work. A developer must manually verify that the code’s behavior matches real-world logic.
  • #A
    #B
    #C
    #D
    Explanation:
    Participating in open audit contests on platforms like Code4rena builds verified proof and community trust.
  • #A
    #B
    #C
    #D
    Explanation:
    Slither performs static code analysis; MythX simulates runtime—using both covers complementary vulnerabilities.
  • #A
    #B
    #C
    #D
    Explanation:
    Gasless transactions improve onboarding by eliminating friction for new users—Tier-3 UX success driver.
  • #A
    #B
    #C
    #D
    Explanation:
    Slither performs static code analysis; MythX simulates runtime—using both covers complementary vulnerabilities.
  • #A
    #B
    #C
    #D
    Explanation:
    High voter turnout proves community re-engagement—an LSI metric linking retention to decentralized decision activity.
  • #A
    #B
    #C
    #D
    Explanation:
    DAO PMs rely on async dashboards like Notion to track proposals, milestones, and cross-time-zone updates.
  • #A
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    #C
    #D
    Explanation:
    Transparent proxy separates admin logic from user calls, preventing proxy loops and role confusion.
  • #A
    #B
    #C
    #D
    Explanation:
    Invariant testing in Solidity focuses on proving that certain properties of a smart contract always hold true, no matter what inputs or transactions occur. These tests run random sequences of actions to check if core rules — like balance consistency, ownership logic, or access permissions — ever break. By doing this, developers can find deep logical bugs or regressions that normal unit tests might miss. It’s one of the most reliable QA methods to ensure contract integrity and security over time.
  • #A
    #B
    #C
    #D
    Explanation:
    Verified commits and deployed code give verifiable skill proof, beating traditional CV screening in Web3.
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