• Difficulty - Medium
    Total Plays - 7
    Allowed Time - 10 sec
    Best time - 10

    What’s a DAO PM’s biggest challenge in remote teams?

    Tip: Click "Play" to reveal options and start playing.

    #A
    #B
    #C
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    Explanation:
    DAO PMs manage globally distributed contributors — asynchronous updates ensure aligned execution without meetings.
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  • Difficulty - Medium
    Total Plays - 7
    Allowed Time - 10 sec
    Best time - 1.077

    Which audit confirms token reserves on-chain?

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    #A
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    Explanation:
    Proof of Reserves (PoR) is an audit that checks if a crypto exchange truly holds enough on-chain assets to cover all user deposits. It compares wallet balances with total liabilities to confirm solvency. This transparent process builds user and regulatory trust by proving funds actually exist.
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  • Difficulty - Medium
    Total Plays - 5
    Allowed Time - 10 sec
    Best time - 1.835

    Which keyword prevents a function override vulnerability?

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    #A
    #B
    #C
    #D
    Explanation:
    The internal specifier limits access to derived contracts only, reducing attack surface and inheritance misuse.
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  • Difficulty - Medium
    Total Plays - 5
    Allowed Time - 10 sec
    Best time - 3.871

    Which Solidity feature is riskiest if misused with delegatecall?

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    #A
    #B
    #C
    #D
    Explanation:
    Delegatecall shares storage between contracts; mismatched layouts can overwrite variables and cause exploits.
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  • Difficulty - Medium
    Total Plays - 4
    Allowed Time - 10 sec
    Best time - 1.498

    Which metric best shows DAO member loyalty post-airdrop?

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    #A
    #B
    #C
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    Explanation:
    Retention captures wallet-level engagement and recurring activity — a Tier-2 metric for real community stickiness.
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  • Difficulty - Medium
    Total Plays - 17
    Allowed Time - 10 sec
    Best time - 2.464

    Why might a contract work on testnet but fail on mainnet?

    Tip: Click "Play" to reveal options and start playing.

    #A
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    Explanation:
    Mainnets often have stricter gas limits and higher costs than testnets. A function that runs fine on testnet may exceed block gas limits in production. Developers should simulate deployments and optimize loops before mainnet release
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  • Difficulty - Medium
    Total Plays - 20
    Allowed Time - 10 sec
    Best time - 2.132

    When does a fallback trigger?

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    Explanation:
    The fallback() function runs when a transaction calls a non-existent function or sends data without matching any signature. It’s essential for proxy contracts but must be written carefully to avoid gas griefing and reentrancy risks.
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  • Difficulty - Medium
    Total Plays - 13
    Allowed Time - 10 sec
    Best time - 1.483

    What does delegatecall do?

    Tip: Click "Play" to reveal options and start playing.

    #A
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    #C
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    Explanation:
    delegatecall lets one contract run another’s code while keeping its own storage and balance. It’s powerful but risky — if the target contract has malicious logic, it can overwrite your state variables or drain funds. Auditors always flag unsafe delegatecalls
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  • Difficulty - Medium
    Total Plays - 24
    Allowed Time - 10 sec
    Best time - 1.968

    What is a rollup?

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    Explanation:
    Rollups are Layer 2 blockchain scaling solutions that bundle multiple transactions off-chain and then post cryptographic proofs to the main chain. This reduces gas fees and increases transaction speed while maintaining the security and decentralization of the base blockchain. Rollups are key to Ethereum scalability and the future of high-performance Web3 applications.
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  • Difficulty - Medium
    Total Plays - 25
    Allowed Time - 10 sec
    Best time - 1.330

    What does MEV stand for in Ethereum?

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    Explanation:
    MEV (Maximum Extractable Value) refers to profits gained by reordering or inserting transactions in a block. It’s a major focus in blockchain security and DeFi optimization, influencing how validators and searchers interact with the mempool.
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  • Difficulty - Medium
    Total Plays - 29
    Allowed Time - 10 sec
    Best time - 0.936

    What is sharding in blockchains?

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    #A
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    Explanation:
    Sharding is a blockchain scalability technique that divides the entire network’s data into smaller, manageable pieces called shards. Each shard processes its own transactions and smart contracts, improving network speed, performance, and efficiency. This concept is key for scalable blockchain infrastructure like Ethereum 2.0 and future Web3 ecosystems.
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