Your roommate may be one of those people. But if you discover that you don't have much in common with your roommate, that's ok. Talk with your roommate. Ask about his or her personal preferences regarding neatness, sleep schedules, music levels, visitors, etc., and then share your preferences, too. If you decide to room with another student during your sophomore year, that's fine.
Many college students change roommates once or twice in their college careers.
Rooming with other students is a wonderful way to learn firsthand how to get along with your fellow human beings, quirks and all. As an international student, you'll also learn the unique aspects of different cultures by living with roommates. Take a soothing, deep breath before reading the test, and ask the professor if you have any questions about its contents. Answer the easier questions on the test and then proceed to the others. Try to allow enough time to review all of your answers.