Interview And Suit Wahala

hello,
Interview And Suit Wahala

please i would want to know if its compulsory to put on suit for interview . i thought suits were compulsory for bank jobs or closely related jobs. what about other sectors like energy, oil and gas etc. is this suit thing a must?a friend was invited for an interview and i noticed that he took the suit issue as if the job depended on the suit he wore. plz enlighten me i want to know.