• Difficulty - Medium
    Total Plays - 35
    Allowed Time - 10 sec
    Best time - 1.663

    How do fashion brands use NFTs?

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    #A
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    Explanation:
    They link physical goods to NFTs. This proves ownership and authenticity.
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  • Difficulty - Medium
    Total Plays - 31
    Allowed Time - 10 sec
    Best time - 1.117

    What’s NFT “fractionalization”?

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    #A
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    Explanation:
    Many people co-own one NFT. This makes pricey NFTs affordable.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 30
    Allowed Time - 10 sec
    Best time - 1.424

    Which platform focuses on NFT-based games?

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    #B
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    Explanation:
    Decentraland is a virtual world where users buy land and items as NFTs. It blends gaming and digital ownership.
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  • Difficulty - Medium
    Total Plays - 34
    Allowed Time - 10 sec
    Best time - 1.486

    Why do some NFTs include royalties?

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    #A
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    Explanation:
    Royalties ensure creators earn money each time their NFT is resold. This gives artists ongoing income.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 39
    Allowed Time - 10 sec
    Best time - 1.466

    Which is a risk of using oracles?

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    #A
    #B
    #C
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    Explanation:
    Centralized oracles can be a single point of failure. If they provide false data, contracts relying on them can be exploited.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 29
    Allowed Time - 10 sec
    Best time - 1.368

    What does an Eclipse attack target?

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    Explanation:
    In an Eclipse attack, an attacker isolates a node from the network, feeding it false data. This can lead to incorrect transaction processing or vulnerability to double spending.
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  • Difficulty - Medium
    Total Plays - 32
    Allowed Time - 10 sec
    Best time - 3.504

    What does the immutable keyword do in Solidity?

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    #A
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    Explanation:
    immutable variables are assigned once during deployment and can’t be changed afterward. They are more gas-efficient than regular storage variables.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 30
    Allowed Time - 10 sec
    Best time - 0.977

    What is the primary purpose of a modifier in Solidity?

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    #A
    #B
    #C
    #D
    Explanation:
    Modifiers are used to add conditional logic like access control to functions. They prevent code repetition and keep logic clean.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 32
    Allowed Time - 10 sec
    Best time - 0.985

    Which blockchain introduced smart contracts?

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    Explanation:
    Ethereum popularized smart contracts and allowed developers to build decentralized apps.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 42
    Allowed Time - 10 sec
    Best time - 1.573

    Decentralized exchanges:

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    #A
    #B
    #C
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    Explanation:
    Decentralized exchanges (DEXs) operate using smart contracts, which automatically execute trades without the need for intermediaries. This allows users to trade crypto directly from their wallets while maintaining control of their assets
    Leaderboard
  • Difficulty - Medium
    Total Plays - 34
    Allowed Time - 10 sec
    Best time - 1.883

    Royalties in NFTs allow:

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    #A
    #B
    #C
    #D
    Explanation:
    Royalties in NFTs ensure that artists receive a percentage of sales every time their work is resold on secondary markets. This feature provides creators with ongoing income and supports long-term value for their digital art.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 31
    Allowed Time - 10 sec
    Best time - 1.603

    Which is NOT a Web3 wallet?

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    #A
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    #C
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    Explanation:
    Google Drive is a cloud-based storage service that lets you store, access, and share files online. It offers seamless integration with Google Workspace apps like Docs, Sheets, and Slides.
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  • Difficulty - Medium
    Total Plays - 28
    Allowed Time - 10 sec
    Best time - 1.030

    Gas in Ethereum is measured in:

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    #A
    #B
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    Explanation:
    Gwei is a smaller unit of ETH used to calculate gas costs.
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  • Difficulty - Medium
    Total Plays - 28
    Allowed Time - 10 sec
    Best time - 1.897

    "Liquidity pools" in DeFi are used to:

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    #A
    #B
    #C
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    Explanation:
    Pools lock tokens for trading on platforms like Uniswap, replacing traditional order books.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 28
    Allowed Time - 10 sec
    Best time - 1.643

    Gas limits prevent:

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    #A
    #B
    #C
    #D
    Explanation:
    Gas limits set a maximum amount of computation a transaction can use, preventing infinite loops or excessively long operations from running indefinitely. This protects the network and user funds by halting transactions that exceed the limit.
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  • Difficulty - Medium
    Total Plays - 28
    Allowed Time - 10 sec
    Best time - 1.238

    Combines PoW and PoS?

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    #A
    #B
    #C
    #D
    Explanation:
    Hybrid mechanisms (e.g., Decred) blend PoW mining with PoS voting for balanced security.
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