What is the role of the discount factor in reinforcement learning? a) To give higher weight to future rewards b) To reduce the importance of future rewards compared to immediate rewards c) To balance the action space d) To increase the loss function Answer: b) To reduce the importance of future rewards compared to immediate […]
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What is the “Markov decision process” (MDP) in reinforcement learning? a) A process used to make supervised learning predictions b) A mathematical framework to model decision-making with rewards and states c) An algorithm for training deep neural networks d) A system for classifying data Answer: b) A mathematical framework to model decision-making with rewards and
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What is the difference between reinforcement learning and supervised learning? a) Reinforcement learning uses labeled data, while supervised learning uses trial and error b) Reinforcement learning uses trial and error, while supervised learning uses labeled data c) Both methods use labeled data d) Both methods involve trial and error Answer: b) Reinforcement learning uses trial
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What does the term “exploitation” mean in reinforcement learning? a) Using the agent’s existing knowledge to make decisions b) Searching for new states c) Reducing the action space d) Resetting the environment Answer: a) Using the agent’s existing knowledge to make decisions Explanation: Exploitation refers to using the agent’s learned policy or knowledge to make
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What is the role of exploration in reinforcement learning? a) To ensure the agent always follows the best-known policy b) To allow the agent to try new actions and learn from them c) To increase the loss function d) To minimize the number of states in the environment Answer: b) To allow the agent to
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What does the term “policy” mean in reinforcement learning? a) The function that maps actions to rewards b) The strategy that defines how the agent selects actions c) The model used to predict future states d) The algorithm used to update the environment Answer: b) The strategy that defines how the agent selects actions Explanation:
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What is a reward in reinforcement learning? a) The total number of actions taken b) A signal given to the agent to indicate how good or bad an action is c) The loss value of the agent’s model d) The final state of the environment Answer: b) A signal given to the agent to indicate
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In reinforcement learning, what does the environment refer to? a) The training data b) The external system with which the agent interacts c) A type of algorithm d) The loss function Answer: b) The external system with which the agent interacts Explanation: The environment in reinforcement learning is the external system that the agent interacts
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What is an agent in reinforcement learning? a) A system that provides rewards b) A function that takes inputs c) An entity that interacts with the environment and takes actions d) A type of neural network Answer: c) An entity that interacts with the environment and takes actions Explanation: The agent is the learner in
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What is the goal of reinforcement learning? a) To minimize the loss function b) To maximize cumulative rewards over time c) To reduce the number of features d) To generate labeled data Answer: b) To maximize cumulative rewards over time Explanation: The goal of reinforcement learning is to train agents to take actions that maximize
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What is the role of a timestamp in a blockchain block? a) To record when the block was added to the blockchain b) To encrypt the transactions in the block c) To identify the size of the block d) To reward the miners for their work Answer: a) To record when the block was added
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How does blockchain ensure transparency? a) By keeping all transactions private b) By making the ledger accessible to all participants c) By encrypting all data d) By only allowing governments to access the ledger Answer: b) By making the ledger accessible to all participants Explanation: Blockchain ensures transparency by making the distributed ledger available to
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What is a blockchain explorer? a) A tool used to view information about blockchain transactions and blocks b) A miner that validates transactions c) A program that manages wallets d) A type of cryptocurrency wallet Answer: a) A tool used to view information about blockchain transactions and blocks Explanation: A blockchain explorer is a web-based
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What is gas in the Ethereum blockchain? a) A measure of computational work required for transactions b) A type of cryptocurrency c) A block reward given to miners d) A cryptographic function Answer: a) A measure of computational work required for transactions Explanation: Gas is a unit that measures the computational work required for transactions
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What is the double-spending problem in blockchain? a) When a miner solves two blocks at once b) When the same digital currency is spent more than once c) When a blockchain forks into two d) When miners work together to solve a block Answer: b) When the same digital currency is spent more than once
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How does blockchain achieve security? a) By encrypting transactions with public and private keys b) By allowing everyone to change the data c) By using centralized servers d) By deleting old blocks regularly Answer: a) By encrypting transactions with public and private keys Explanation: Blockchain achieves security by using cryptographic techniques like public and private
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What is a permissioned blockchain? a) A blockchain that is open to the public b) A blockchain that only allows specific participants to validate transactions c) A blockchain without any permissions d) A government-controlled blockchain Answer: b) A blockchain that only allows specific participants to validate transactions Explanation: A permissioned blockchain allows only authorized participants
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Which cryptocurrency was the first to implement blockchain technology? a) Ethereum b) Litecoin c) Bitcoin d) Ripple Answer: c) Bitcoin Explanation: Bitcoin was the first cryptocurrency to implement blockchain technology when it was launched in 2009 by an unknown person or group of people using the name Satoshi Nakamoto. Reference: Blockchain Quiz – MCQ Questions
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What is “immutability” in blockchain? a) Data can be easily modified b) Data can be deleted if needed c) Once data is recorded on the blockchain, it cannot be changed d) Data can be changed only by miners Answer: c) Once data is recorded on the blockchain, it cannot be changed Explanation: Immutability means that
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What is the primary advantage of using blockchain? a) Centralized control of data b) Increased transparency and security c) Lower computational power d) Fewer nodes in the network Answer: b) Increased transparency and security Explanation: Blockchain’s primary advantage is that it increases transparency and security by using decentralized, cryptographically secure data storage. Reference: Blockchain Quiz
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What is a “cryptographic hash” in blockchain? a) A mathematical function that converts input into a fixed-length output b) A block that is encrypted with a private key c) A key used to generate blocks d) A program used to mine cryptocurrencies Answer: a) A mathematical function that converts input into a fixed-length output Explanation:
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What is a permissionless blockchain? a) A blockchain that requires approval to join b) A blockchain that anyone can join and participate in c) A blockchain used only for private companies d) A blockchain that operates without nodes Answer: b) A blockchain that anyone can join and participate in Explanation: A permissionless blockchain allows anyone
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What is a 51% attack in blockchain? a) An attack that disrupts mining b) When a miner or group controls more than 51% of the blockchain’s computational power c) An attack to steal private keys d) A way to fork the blockchain Answer: b) When a miner or group controls more than 51% of the
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What is a fork in blockchain? a) A way to delete blocks from the blockchain b) A change or split in the blockchain protocol c) A cryptographic function used to sign transactions d) A security feature to prevent hacking Answer: b) A change or split in the blockchain protocol Explanation: A fork in blockchain refers
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What is a node in blockchain? a) A user of a blockchain network b) A device or participant that helps maintain the blockchain c) A cryptographic key d) A type of smart contract Answer: b) A device or participant that helps maintain the blockchain Explanation: A node is a participant in the blockchain network that
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