18. Blockchain Technology Quiz

What is a key characteristic of blockchain technology?

• It is only used for cryptocurrencies.

• It is a distributed ledger.

• It is a private ledger.

• It is centralized.

Who can maintain the ledger in a blockchain?

• Only authorized personnel.

• Only the creator of the blockchain.

• Only financial institutions.

• Everyone participating in the blockchain.

What are some applications of blockchain technology?

• Weather forecasting and space exploration.

• Traditional banking and stock trading.

• Social media and online gaming.

• Payment processing and digital identification.

Which of the following is NOT a type of transaction that can be recorded on the blockchain?

• Transferring Bitcoin.

• Transferring a house title.

• Creating a data backup.

• Sending an email.

What happens to the transaction information in a blockchain?

• It is sent to a central server.

• It is sent to everyone participating in the blockchain.

• It is stored in a private database.

• It is deleted after processing.

What is added to a block to ensure the integrity of transactions?

• A unique identifier.

• A digital signature.

• A timestamp.

• A hash.

What happens if a transaction in the blockchain is modified?

• The entire blockchain is invalidated.

• The hash becomes invalid.

• The transaction is ignored.

• The transaction is re-verified.

How do devices maintaining the ledger respond to an invalid hash?

• They modify the block.

• They throw out the block.

• They accept the block.

• They ignore the block.

What is one potential future application of blockchain technology?

• Paper-based transactions.

• Various digital applications.

• Cryptocurrency only.

• Traditional banking.

What ensures the integrity of transactions in a blockchain?

• A hash.

• A digital signature.

• A unique identifier.

• A central authority.