Without a student visa, your plans of studying in the UK cannot materialize. Getting the visa application approved requires one of them to pass an interview at the UK embassy. Students attending this interview can look at this list of UK Embassy interview questions and answers for student visas that are frequently asked.
Before the student appears for the interview, they should be prepared to answer questions about themselves, the course and the university. The interviewer is always well-versed in the course of the study, so it is best to give clear answers.