Blockchain Quiz

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Blockchain Quiz channel for Web3 learners and professionals: practice blockchain, DeFi, NFT, smart contract, and blockchain security quiz questions with answers

  • 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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  • 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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    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?

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    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:

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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
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  • Difficulty - Medium
    Total Plays - 34
    Allowed Time - 10 sec
    Best time - 1.883

    Royalties in NFTs allow:

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    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.
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