CBDE Exam Dumps : BTA Certified Blockchain Developer - Ethereum

True, but it's still good to use Ganache, or even a real private network for testing.

False, it's necessary to use Ganache or even a real private network for testing.

to use it for the whole business logic. It’s always best to have everything in once place.

to use it only for things which need the benefits of the blockchain.

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.