An oral examination, also known as a viva (4 letters) or a taste test (9 letters), is an assessment of a student's knowledge and understanding of a particular subject. It is usually conducted by a panel of experts who ask questions and evaluate the student's responses. The purpose of an oral examination is to assess the student's ability to think critically and articulate their ideas in a clear and concise manner. It is also used to assess the student's ability to apply their knowledge to real-world situations.