When developing in Ethereum which is considered to be an In-Memory Blockchain simulations for rapid development?
Transactions can be only added to a blockchain.
Pending transactions on the Ethereum blockchain are always ordered by highest fee paid to lowest, and then written to the block in that order.
To prevent duplicate addresses/accounts from being generated on the same blockchain network, the input of the hash function that generates the address:
Public blockchains can alter the blockchain ledger by: