Block Chain Quiz ( Sample)

What is a Blockchain?

• A. A type of cryptocurrency
• B. A decentralized and distributed ledger
• C. A centralized database
• D. A computer programming language

What is the role of miners in a blockchain network?

• A. Creating new coins
• B. Validating transactions and adding them to the blockchain
• C. Managing smart contracts
• D. Setting the rules for the blockchain

What does the term "Decentralization" mean in the context of blockchain?

• A. A single entity or authority controls the entire network
• B. Power and control are distributed among multiple participants
• C. All transactions are private and hidden
• D. The blockchain can be easily modified

What is a Cryptocurrency Wallet used for?

• A. Storing physical cash
• B. Storing digital files
• C. Storing and managing digital assets like cryptocurrencies
• D. Sending emails securely

What is the key feature of a Smart Contract?

• A. It requires manual execution by a third party
• B. It is written in natural language
• C. It self-executes when predefined conditions are met
• D. It can only be executed by a government authority

What is the purpose of Public and Private Keys in blockchain cryptography?

• A. Public Key is used for encryption, and Private Key is used for decryption
• B. Public Key is used for decryption, and Private Key is used for encryption
• C. Both keys are used for encryption
• D. Both keys are used for decryption

What does the term "Immutable" mean in the context of blockchain?

• A. Data can be easily modified
• B. Data can never be changed or tampered with once it's added to the blockchain
• C. Data can only be accessed by a single user
• D. Data is constantly updated

What is a Node in a blockchain network?

• A. A type of cryptocurrency
• B. A participant in the network that stores a copy of the blockchain
• C. A specialized computer for mining
• D. A digital signature
• Option 5

Which blockchain platform is known for supporting Smart Contracts and Decentralized Applications (DApps)?

• A. Bitcoin
• B. Ethereum
• C. Litecoin
• D. Ripple