Blockchain Test 1

Question 1

Which of the following are real-world Blockchain applications?

Accepted Answer

All of the above

Answer

Explanation:
The blockchain is a logical technological advancement that is also philosophically progressive, as it transfers power and control of essential information from CEO boards to the general public. If blockchain technology can be developed and expanded to the required degree, it has the potential to eliminate corporate fraud and abuse of power.

Question 2

On a public Blockchain, who can read the records?

Accepted Answer

Everyone on the Blockchain

Answer

Explanation:
On a public blockchain network, anyone can read, write, and see data. It is impossible to change or delete an entry once it has been confirmed in a public blockchain. Permissioned blockchains are private blockchains.

Question 3

A block header is made up of which item(s)?

Accepted Answer

The hash of the previous block

Answer

The correct answer:
The hash of the previous block

Question 4

What happens if two blocks are confirmed simultaneously?

Accepted Answer

Which block is added to the Blockchain is decided by the nodes.

Answer

Explanation:
The chain will split if more than one block is validated at the same time. In other words, each node in a blockchain keeps a copy of the database. Let's pretend that two blocks, A and B, were certified at the same moment. After both blocks have been validated, some nodes will receive A first, while others will receive B first.

Question 5

For cryptocurrencies, which of the following challenges did Blockchain solve?

Accepted Answer

Anonymity

Answer

Explanation:
The fundamental difficulty is that the anonymity-provisioning mechanism must allow other members to verify updates to the blockchain. Most blockchain-based e-cash protocols' pseudonymous feature is insufficient for users to achieve identification and transaction privacy.

Blockchain Practice Test

Blockchain Practice Test

Blockchain Test 1