• Difficulty - Medium
    Total Plays - 31
    Allowed Time - 10 sec
    Best time - 1.388

    What is the purpose of the #[account] macro in Anchor?

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

    #A
    #B
    #C
    #D
    Explanation:
    The #[account] macro in Anchor is used to define and validate account structures for Solana smart contracts. It simplifies account management and ensures data integrity.
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  • Difficulty - Medium
    Total Plays - 27
    Allowed Time - 10 sec
    Best time - 2.943

    Which Rust feature ensures type safety in blockchain data structures?

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

    #A
    #B
    #C
    #D
    Explanation:
    Rust’s ownership model enforces strict rules on data access, preventing issues like double-spending in blockchain applications. It ensures compile-time safety for complex data structures.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 32
    Allowed Time - 10 sec
    Best time - 0.964

    Which Rust framework is used for Solana smart contract development?

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

    #A
    #B
    #C
    #D
    Explanation:
    Anchor is a Rust-based framework designed for developing secure and efficient smart contracts on Solana. It simplifies the process with macros and abstractions for Solana’s programming model.
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  • Difficulty - Medium
    Total Plays - 40
    Allowed Time - 10 sec
    Best time - 2.038

    What’s the purpose of an NFT whitelist?

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

    #A
    #B
    #C
    #D
    Explanation:
    Whitelists let selected users mint first. It rewards loyal fans and avoids gas spikes.
    Leaderboard
  • Difficulty - Medium
    Total Plays - 35
    Allowed Time - 10 sec
    Best time - 1.663

    How do fashion brands use NFTs?

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

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

    What’s NFT “fractionalization”?

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

    #A
    #B
    #C
    #D
    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?

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

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

    Why do some NFTs include royalties?

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

    #A
    #B
    #C
    #D
    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?

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

    #A
    #B
    #C
    #D
    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?

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

    #A
    #B
    #C
    #D
    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?

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

    #A
    #B
    #C
    #D
    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?

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

    #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.
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  • Difficulty - Medium
    Total Plays - 32
    Allowed Time - 10 sec
    Best time - 0.985

    Which blockchain introduced smart contracts?

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

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

    Decentralized exchanges:

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

    #A
    #B
    #C
    #D
    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:

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

    #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?

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

    #A
    #B
    #C
    #D
    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:

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

    #A
    #B
    #C
    #D
    Explanation:
    Gwei is a smaller unit of ETH used to calculate gas costs.
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