Blockchain and Cryptography Quiz

What is a ledger in the context of blockchain?

• A) A cryptographic hash function

• B) A collection of transactions

• C) A Bitcoin address

• D) A consensus model

Which cryptographic hash function is commonly used in blockchain implementations?

• A) MD5

• B) SHA (Secure Hash Algorithm)

• C) AES (Advanced Encryption Standard)

• D) RSA (Rivest–Shamir–Adleman)

What does Asymmetric-Key Cryptography enable in blockchain networks?

• A) Private key encryption

• B) Public key encryption

• C) Both A and B

• D) Hash function

How are Bitcoin addresses derived from public keys?

• A) Base64 encoding

• B) Base32 encoding

• C) Base58Check encoding

• D) Base16 encoding

What is the purpose of a wallet in blockchain?

• A) To store and manage Bitcoin

• B) To contain only keys

• C) To encode transactions

• D) To verify the integrity of the blockchain

What is a disadvantage of non-deterministic wallets?

• A) Keys are related to each other

• B) They generate keys from a single master key

• C) Keys are independently generated

• D) They require a seed for key generation

What are transactions in the context of blockchain?

• A) Encoded transfers between participants

• B) Encrypted messages between nodes

• C) Hash values of block headers

• D) Encoded blocks in the blockchain

What is the role of fees in blockchain transactions?

• A) To reward miners for processing transactions

• B) To increase the security of the blockchain

• C) To encode transaction details

• D) To verify the authenticity of transactions

What does a block header in blockchain contain?

• A) List of transaction scripts

• B) Metadata for the block

• C) Encrypted transaction data

• D) Public entry of transactions

What does a locking script do in a transaction?

• A) Encodes the transfer value

• B) Specifies the conditions to spend an output

• C) Contains digital signatures

• D) Contains the checksum for a Bitcoin address