You can wear a suit without a tie for an interview. It looks formal if you select suits that are light colored, colors such as grey, cream etc.
suit with a green tie
Proffesional, suit and tie
Depending of the occasion. For a wedding, if you are just a regular guest, I think it's ok to wear a suit without a tie. Better is to ask your friends. Depends on the formality of the wedding.
Any sports coat will look just fine without a tie and will be considered casual business wear.
no you have to wear green or orange
yes you have to
To interview at a bank, you should wear professional clothing. If you are a man, you should wear a suit and tie, or at least khakis and a sports coat. If you are a woman, you should wear a dress or skirt and blouse and high heels. Make sure to look clean and neat. Good luck! Later on in your career, you should wear a blue pin stripe suit, Hermes tie, french cuff shirt and full brogues.
Yes.
No.
cravat
A dressy suit, tie, and shoes.
I would wear a yellow or pink tie