• Difficulty - Medium
    Total Plays - 74
    Allowed Time - 10 sec
    Best time - 0.929

    What does OpenZeppelin provide?

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    Explanation:
    OpenZeppelin offers audited, reusable smart contract templates, like ERC-20 and ERC-721 implementations. It enhances security and saves development time.
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  • Difficulty - Medium
    Total Plays - 61
    Allowed Time - 10 sec
    Best time - 1.128

    What does Ganache provide in blockchain?

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    Explanation:
    Ganache creates a local Ethereum blockchain for development and testing. It allows developers to deploy contracts and simulate transactions without real ETH.
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  • Difficulty - Medium
    Total Plays - 58
    Allowed Time - 10 sec
    Best time - 0.081

    What is Web3.js used for?

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    Explanation:
    Web3.js is a JavaScript library for interacting with Ethereum, enabling dApps to communicate with nodes. It handles tasks like sending transactions and reading blockchain data.
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  • Difficulty - Medium
    Total Plays - 52
    Allowed Time - 10 sec
    Best time - 1.527

    What is a token standard?

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    Explanation:
    A token standard, like ERC-20, defines rules for creating tokens on a blockchain. It ensures compatibility for cross-chain transfers and DeFi applications.
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  • Difficulty - Medium
    Total Plays - 49
    Allowed Time - 10 sec
    Best time - 1.130

    What enables cross-chain communication?

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    Explanation:
    Interoperability protocols allow different blockchains to communicate and share data or assets seamlessly. Examples include Polkadot and Cosmos, which facilitate cross-chain transactions.
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  • Difficulty - Medium
    Total Plays - 41
    Allowed Time - 10 sec
    Best time - 1.626

    What Rust feature optimizes blockchain transaction processing?

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    Explanation:
    Rust’s async programming, with crates like Tokio, enables high-throughput transaction processing in blockchain nodes. It supports concurrent handling of network requests and validations.
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  • Difficulty - Medium
    Total Plays - 39
    Allowed Time - 10 sec
    Best time - 1.375

    Why is Rust preferred for high-performance blockchain runtimes?

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    Explanation:
    Rust’s zero-cost abstractions allow developers to write high-level code without runtime performance penalties, ideal for blockchain runtimes. This ensures efficient execution of smart contracts and consensus algorithms.
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  • Difficulty - Medium
    Total Plays - 31
    Allowed Time - 10 sec
    Best time - 1.388

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

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    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?

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    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.
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  • Difficulty - Medium
    Total Plays - 32
    Allowed Time - 10 sec
    Best time - 0.964

    Which Rust framework is used for Solana smart contract development?

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    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?

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

    How do fashion brands use NFTs?

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

    Which platform focuses on NFT-based games?

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

    Which is a risk of using oracles?

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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.
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  • 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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    Explanation:
    immutable variables are assigned once during deployment and can’t be changed afterward. They are more gas-efficient than regular storage variables.
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