depends on the cheese... but a block of extra sharp cheddar with some mold on one edge is still good... just cut the mold off. however, slices of American cheese is a different story. but cheese is what it is---aged.
Cheese is refrigerated.
It does not need to kept refrigerated but it will last longer if it is.
Yes. Ricotta cheese is perishable and needs to be refrigerated. This makes sense because it needs to be refrigerated before it is used as an ingredient in foods so it still needs to be refrigerated. Cream cheese icings on cake should also be refrigerated.
Salt water draws out excess water from inside the cheese, creating a hard outer rind which protects the cheese.
Yes
That is brine, basically salty water
In a fridge. It is best to be kept in the fridge.
On top of old spaghetti, covered with cheese!
An hour at room temp.
Until someone puts it back in.
Yes. Every food can go bad. Cream cheese frosting should be kept in the fridge, since it has dairy in it.