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What is the purpose of a Nonce?

40. What is the purpose of a Nonce?

1. Follows nouns
2. A Hash Function
3. Prevents Double Spending
4. Send Information to the Blockchain Network

Answer: C) Prevents Double Spending

Explanation:

Every account has a globally available nonce that protects against same-chain replay attacks and double spending. The nonce is the transaction's sequence number, which miners examine since a block with an erroneous nonce is invalid.