Blockchain programing with IQRAR

Q: What is Blockchain and explain it ?

Answer: A blockchain is a distributed database that is shared among the nodes of a computer network. As a database, a blockchain stores information electronically in digital format. A blockchain is a decentralized, distributed and public digital ledger that is used to record transactions across many computers so that the record cannot be altered retroactively without the alteration of all subsequent blocks and the consensus of the network.”

• Blockchain allows Bitcoin and other cryptocurrencies to operate without the need for a central authority.
• A Blockchain is a method of storing a list of entries, which cannot be changed easily after they are created.
• Blockchain is a system of recording information in a way that makes it difficult or impossible to change, hack, or cheat the system.