What is a nonce?
A. None of the above
B. A cryptographic hash
C. The target number to solve the PoW algorithm
D. A number used once
Answer:D
What is a nonce?
A. None of the above B. A cryptographic hash C. The target number to solve the PoW algorithm D. A number used once
Explanation: A nonce is a number used only once. In blockchains, it is combined with the block header to reach the set target. If the target is not reached, the nonce is changed and the hashing starts again, this repeats until the condition is fulfilled. If all nonces have been exhausted, other methods such as the extra nonce solution are used among others.