1. Is there a visa interview?
There is no visa interview.
2. If I have a visa reject from some other country will I get a Canada visa.?
Yes, it is possible to get a Canadian visa.
3. Is there any difference in the process if I want to study in Quebec?
If you apply to study in Quebec, you need a certificate of acceptance or CAQ. However Qeuebec does not have any popular community colleges. Student will have to apply only to private colleges.