CBDE Exam Dumps : BTA Certified Blockchain Developer - Ethereum

to deploy to the main-network as quickly as possible.

to use in-memory blockchain simulations, because mining works instantaneously.

to use a private network at all times, because this is the closest you get to the real network.

would be better, because it can reduce the amount of energy needed for mining.

would be worse, because it would increase the amount of energy needed for mining.

with private state variables. This way nobody else other than the smart contract itself can see the information

with external contracts holding those values. This way we can make sure that the information flow is following a clear logic and nobody else can access this information.

You can't hide anything on the blockchain, because the information is public, just the call is private which means only other smart contracts would be limited in accessing that information.