Viva voce exams, also known as orals, are a type of exam where students are tested orally on their knowledge of a subject. This type of exam is often used in language classes, but can also be used to test knowledge in other subjects. The student is asked questions by the examiner and must answer them in order to demonstrate their understanding of the material. Viva voce exams are an effective way to assess a student's knowledge and can provide valuable feedback to the student and instructor.