no it is not , it is evergreenActually in cooler climates it is not an evergreen and I don't believe it is considered an evergreen anywhere. It is deciduous.
Yes
no it would not
Yes. The green are picked green and the black are allowed to ripen. They both go through the same process of curing in brine.
It depends on the climate on which the olive tree is being produced. It does need a little cold though. It can grow on rocky surfaces like in Texas.