In reality it is much more. An interview is not a semi-passive conversation during which you answer questions and then wait to see if you receive a job offer. It is a sales process that requires preparation. Remember that you are selling yourself, and this is the time to close. If it is the first interview, then ask to attend the second interview.
Companies like to see interest on the part of candidates.
If all other factors are equal, they usually prefer the candidate who shows the most interest by asking good questions and by asking for the position. Declare your interest Based on your new understanding of the position and its duties, tell the interviewer what you feel you can contribute. Tell the interviewer that you are interested and why. Then ask to go on to the next stage. An interview is not the time to be shy.