Which consensus algorithm does Bitcoin use? a) Proof of Stake (PoS) b) Delegated Proof of Stake (DPoS) c) Proof of Work (PoW) d) Byzantine Fault Tolerance (BFT) Answer: c) Proof of Work (PoW) Explanation: Bitcoin uses Proof of Work (PoW) as its consensus algorithm, which requires miners to solve complex computational puzzles to validate transactions. […]
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What is the genesis block in blockchain? a) The last block of the blockchain b) The first block in the blockchain c) A block that is encrypted for security d) A block that contains only metadata Answer: b) The first block in the blockchain Explanation: The genesis block is the first block of a blockchain,
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What is a public key in blockchain? a) A key used to encrypt blockchain data b) A publicly available key used to verify transactions c) A key used to generate new blocks d) A key to unlock smart contracts Answer: b) A publicly available key used to verify transactions Explanation: A public key is shared
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What is a private key in blockchain? a) A public identifier for a blockchain wallet b) A secret key used to sign transactions c) A shared password for accessing the blockchain d) A key to encrypt data in blocks Answer: b) A secret key used to sign transactions Explanation: A private key is a cryptographic
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What is a “smart contract” in blockchain? a) A self-executing contract with the terms written in code b) A physical contract stored on the blockchain c) A legal agreement between two blockchain users d) A software application that encrypts blockchain data Answer: a) A self-executing contract with the terms written in code Explanation: Smart contracts
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What is a consensus algorithm in blockchain? a) An algorithm used to control inflation b) A method to achieve agreement on the state of the blockchain c) A program that encrypts blockchain transactions d) A process to create private keys Answer: b) A method to achieve agreement on the state of the blockchain Explanation: A
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What does “decentralized” mean in blockchain? a) All control is with one central authority b) Control is distributed among many participants c) Blockchain is hosted on a single server d) It is a government-controlled network Answer: b) Control is distributed among many participants Explanation: In a decentralized system, control and decision-making are distributed across multiple
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What is the role of miners in blockchain? a) To store data on the blockchain b) To verify and validate transactions c) To create new types of cryptocurrencies d) To manage blockchain wallets Answer: b) To verify and validate transactions Explanation: Miners use computational power to verify and validate transactions, adding them to the blockchain
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What is a block in a blockchain? a) A group of transactions bundled together b) A type of cryptocurrency c) A single transaction in the blockchain d) A user’s private key Answer: a) A group of transactions bundled together Explanation: A block contains a list of transactions that are verified and recorded in the blockchain,
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What is blockchain technology? a) A centralized ledger of transactions b) A decentralized, distributed ledger of transactions c) A physical chain of blocks d) A private database for financial institutions Answer: b) A decentralized, distributed ledger of transactions Explanation: Blockchain is a decentralized and distributed ledger that records transactions across multiple computers, ensuring security and
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Which of the following is a limitation of WebAssembly? a) It cannot handle computationally intensive tasks b) It cannot access browser features like localStorage directly c) It cannot be used with JavaScript d) It cannot be used for mobile development Answer: b) It cannot access browser features like localStorage directly Explanation: WebAssembly cannot directly access
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Which of the following tools can compile C/C++ code into WebAssembly? a) npm b) Emscripten c) Visual Studio d) WebStorm Answer: b) Emscripten Explanation: Emscripten is a popular toolchain that compiles C and C++ code into WebAssembly, enabling high-performance applications to run in the browser. Reference: WebAssembly Quiz – MCQ – Multiple Choice Questions
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What is the primary goal of WebAssembly? a) To replace JavaScript b) To enable near-native performance for web applications c) To build mobile apps d) To replace web browsers Answer: b) To enable near-native performance for web applications Explanation: The primary goal of WebAssembly is to enable high-performance applications, like games and video processing, to
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Can WebAssembly be used in non-web environments? a) Yes, it can be used in non-web environments like Node.js b) No, WebAssembly is limited to browsers c) Only on mobile apps d) Only on server-side platforms Answer: a) Yes, it can be used in non-web environments like Node.js Explanation: WebAssembly can be used outside of the
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Is WebAssembly supported by all modern web browsers? a) Yes, WebAssembly is supported by all major browsers b) No, only Chrome supports WebAssembly c) No, WebAssembly requires a special plugin d) Only mobile browsers support WebAssembly Answer: a) Yes, WebAssembly is supported by all major browsers Explanation: WebAssembly is supported by all modern browsers, including
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Can WebAssembly directly manipulate the DOM? a) Yes, it can directly manipulate the DOM b) No, WebAssembly must interact with the DOM through JavaScript c) Only in certain browsers d) WebAssembly cannot interact with the DOM Answer: b) No, WebAssembly must interact with the DOM through JavaScript Explanation: WebAssembly does not have direct access to
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Which of the following is a primary use case for WebAssembly? a) Basic HTML page rendering b) High-performance applications like games and video editing c) Styling web pages with CSS d) Building simple websites Answer: b) High-performance applications like games and video editing Explanation: WebAssembly is primarily used for high-performance applications like games, video editing,
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What does WebAssembly Text Format (WAT) represent? a) A compiled WebAssembly file b) A human-readable format for WebAssembly binaries c) A JavaScript framework for Wasm d) A debugger tool for Wasm Answer: b) A human-readable format for WebAssembly binaries Explanation: WebAssembly Text Format (WAT) is a human-readable representation of WebAssembly binary files, making it easier
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How is WebAssembly integrated into web applications? a) By embedding it directly in HTML b) By importing it as a JavaScript module c) By compiling it in the browser d) By running it inside a web worker Answer: b) By importing it as a JavaScript module Explanation: WebAssembly modules can be imported and executed in
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What file extension is used for WebAssembly binaries? a) .wasm b) .wbin c) .webasm d) .wat Answer: a) .wasm Explanation: WebAssembly binaries use the .wasm file extension. Reference: WebAssembly Quiz – MCQ – Multiple Choice Questions
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Is WebAssembly designed to replace JavaScript? a) Yes, WebAssembly will fully replace JavaScript b) No, WebAssembly complements JavaScript c) Only for front-end development d) Only for server-side programming Answer: b) No, WebAssembly complements JavaScript Explanation: WebAssembly is designed to complement JavaScript, enabling developers to use both technologies together to build faster and more efficient web
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Which of the following is a benefit of using WebAssembly? a) It allows direct DOM manipulation b) It enables high-performance code execution c) It replaces JavaScript completely d) It is not supported by modern browsers Answer: b) It enables high-performance code execution Explanation: WebAssembly allows near-native performance in web applications, making it suitable for tasks
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How does WebAssembly run in the browser? a) It runs directly on the CPU b) It runs in a virtual machine c) It is interpreted by the browser’s JavaScript engine d) It runs as part of the DOM Answer: b) It runs in a virtual machine Explanation: WebAssembly runs inside a virtual machine embedded in
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Which languages can be compiled into WebAssembly? a) JavaScript b) C, C++, Rust c) HTML and CSS d) SQL Answer: b) C, C++, Rust Explanation: Languages like C, C++, and Rust can be compiled into WebAssembly, enabling high-performance code to run in web browsers. Reference: WebAssembly Quiz – MCQ – Multiple Choice Questions
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What is WebAssembly (Wasm)? a) A high-level programming language b) A low-level binary format for web browsers c) A database management system d) A front-end framework for web development Answer: b) A low-level binary format for web browsers Explanation: WebAssembly (Wasm) is a low-level binary format that runs in web browsers, enabling near-native performance for
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