As a job seeker, the interviewer is not too demanding to bring a paper tape pen. If you have doubts about even the simplest requirements, or you can't meet them, the results of your interview will definitely be unsatisfactory.
Maybe the interviewer just takes tape and pen as a topic of interview to see if you pay attention to the simple things in daily life and the simple words explained by the boss. Therefore, if you want to succeed in job hunting, you'd better do it according to the requirements put forward in the interview. Besides, it's really easy to bring a pen and paper. As for what's the use, we can only wait until the interview. This may be related to the position you are interviewing for. It may be recording or calculating something.