The reason I got an interview is by taking my current adviser's class and my performance is very good. In the middle of the semester, he told me that he has some funding to support me as an research assistant . If I intend to got that position, I need to do independent study with him. This means that I have to do some research wit him for 6 months and shows him my potentials for this position. Of course, this is an unpaid work. After 6 months working hard, I win the position for my hard working.