What are your painful experiences of failed interviews?

Once, I participated in an interview with a manufacturing company, and I was confident that I could get this position. However, after my interview, I knew there was no hope here.

At first, the interviewer seemed to be looking for a question. He keeps asking me questions about my professional background, such as "How much do you know about manufactured products?" "What professional knowledge do you have?" "Do you think you are qualified for this job?" I can usually answer these questions, but my answers can't change his mind. He is always critical of every detail.

Finally, the interviewer asked me a key question: "How long do you have professional experience?" I have only one year's professional experience, and such an answer makes the interviewer very impatient. He kicked me out and said that I lacked enough experience and ability to be suitable for this job.

From this experience, I learned an important lesson: in the process of finding a job, I must be fully prepared and know my ability before going to the interview.