4. Problem: How does blockchain work and what are its applications beyond cryptocurrencies?

Solution:
Blockchain is a decentralized database where each block contains data and the hash of the previous block, forming an immutable chain.

Applications beyond cryptocurrencies:

  • Supply chain tracking and product authenticity verification.

  • Digital identity management.

  • Smart contracts that self-execute agreements.

  • Secure, transparent voting systems.

  • Secure medical data exchange.

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