Question

question 5 of 10
how does a block of data on a blockchain get locked?
it gets double - checked by the people with access to the public ledger.
the goverment reviews and verifies all blocks of data.
financial institutions review all blocks of data related to cryptocurrency.
blocks of data are locked since they are unalterable.

Explanation:

To determine the correct answer, we analyze each option:

• The first option is incorrect because blockchain data isn't "double - checked" by people with access in the way described; it's verified through consensus mechanisms, not just people checking.
• The second option is wrong as blockchain operates in a decentralized manner, and there's no single government reviewing all blocks.
• The third option is incorrect as blockchain isn't solely reviewed by financial institutions, and its scope is broader than just cryptocurrency - related data.
• The fourth option is correct. In blockchain technology, blocks are linked in a chain, and once a block is added, it's extremely difficult (often considered unalterable in practical terms for most blockchains) to change it. This immutability is what "locks" the data in the block.

Answer:

D. Blocks of data are locked since they are unalterable.