018_Blockchain Technology - CompTIA Security+ SY0-701 - 1.4

What is blockchain technology commonly described as?

• A distributed ledger

• A centralized database

• A type of cloud storage

• A peer-to-peer network

If someone attempts to alter a recorded blockchain transaction, the ______________ becomes invalid, and the modified block is rejected by the network.

• hash

• signature

• transaction ID

• timestamp

What is the purpose of adding a hash to a block in the blockchain?

• To identify the block uniquely and ensure its integrity

• To increase the size of the block

• To make the block easier to read

• To allow for faster transactions

What happens when an invalid hash is detected in the blockchain network?

• The block is accepted and added to the chain

• The block is rejected and considered modified

• The network continues without any changes

• The block is flagged for review but remains in the chain

What is a block in a blockchain?

• A single unit of data that is stored on a chain.

• A type of cryptocurrency used for transactions.

• A method of securing data through encryption.

• A network of computers that validate transactions.

Why is transaction information shared with all participants instead of a single entity?

• To ensure decentralization and transparency

• To increase processing speed

• To reduce operational costs

• To limit access to information

Which technology is commonly used for secure and decentralized data storage?

• Cloud Computing

• Blockchain

• Centralized Database

• Peer-to-Peer Networking

Answer explanation

Blockchain is commonly used for secure and decentralized data storage, making it the correct choice in this scenario.

What is a block in the context of blockchain technology?

• A digital file containing a group of transactions

• A type of cryptocurrency

• A network of computers

• A method of data encryption

How is blockchain used in payment processing?

• It records and verifies transactions without a central authority.

• It requires a central bank to process transactions.

• It eliminates the need for digital wallets.

• It increases transaction fees for users.

In what ways can blockchain help with digital identification?

• By securing identity verification through cryptographic records

• By allowing unlimited access to personal data

• By eliminating the need for any form of identification

• By providing a centralized database for identity storage