The interview time of college students depends on the specific purpose and content. Usually, the interview time of college students will be between 30 minutes and 1 hour, but it may be longer or shorter. The length of the interview will be influenced by the depth and details of the respondents' answers, as well as the extent to which the interviewers ask and supplement questions. Generally speaking, the interview time should be enough to fully understand the interviewee's views and experiences.