Judges look for contestants who are confident and comfortable with their opinions. A good answer should have 4 parts. These are only a sampling of questions you might encounter during an interview. Don't overdo eye shadows and lipstick. Any length of hair is fine.
Most contestants wear their hair at shoulder length to a long style.
For those with short hair, hair extensions can be used. A good salon should be able to assist in determining color and length. As long as they are natural looking, a judge will not usually be able to tell the difference. Usually, 'pageant hair' has a poof at the top sort of like a Jackie Kennedy bouffant. Teasing and hair spray can accomplish this.