If you have not heard from the employer by the time you were told in the interview, call and inquire politely whether they have made a decision. If they have, they may tell you on the spot, so be prepared for either result. If they have decided to hire someone else, thank them for the opportunity of the interview and tell them that you enjoyed meeting them. You never know when your paths may cross again. You might want to ask the interviewer for feedback, which you could use in future applications.
Most interviewers are pleased to provide feedback.
Exhibit enthusiasm and genuine sincerity Make the interviewer believe in you even if you have doubts. I am interested in completing more than one work term with the same firm.