Befroe the Canada Interview

Hello everyone
I am a chinese student in the U.S.A right now. I am waiting for an interview for residence in Canadaa. My interivew will be in New York Location. To help prepare myself. I have a few questions about this interiview if there is anyone that can help me . I would really appreciate your reply.
Here are my questions:
1.what kind of questions do they ask you?
2.How long will the interview take ?
3. Do they requir write skill? I appy by business person.
4.Will you know immiediately that you have passed the interview?
5. How much time do they give you before landing?
Thanks for your any information
My E-Mail is [e-mail]
Thanks again