Stephen, questions are not as important as the answers you give to them and the manner with which you present them. so just relax in the interview room and think through all questions before answering because you cant know all the questions before hand. If there is something you don't know let them know you don't know in a respectful manner.
How to Dress to the Interview
Men's Interview Attire
Suit (solid color -black or dark grey,)/ just trousers(preferably black) depending on what you have.
Long sleeve shirt (white or coordinated with the suit)
Dark socks, conservative leather shoes
Little or no jewelry
Neat, professional hairstyle
Limit the aftershave
Neatly trimmed nails
Portfolio or briefcase containing your needed documents like birth certificate and others.
Women's Interview Attire
Suit (navy, black or dark grey) or just suit skirt(black or dark grey)
The suit skirt should be long enough so you can sit down comfortably
Limited jewelry (no dangling earrings or arms full of bracelets)
No jewelry is better than cheap jewelry
Light make-up and perfume
Neatly manicured clean nails
Portfolio or briefcase