Never forget that an interview is a two-way process.
Good companies recognise this and do their best to put you at ease. They realise that somebody who feels at ease and less stressed will perform better and they will get to know the real you.
They will give you plenty of time to ask questions and will not be dismissive of any question that challenges them.
This does not mean the interview will be a walk in the park. A good company will ask challenging questions and dig deep to ensure that you can substantiate what you claim and that there are no contradictions.
You should welcome a rigorous process too. This will mean that when they decide that you are the right fit for them, they base the decision on how you performed during the process and not just your education levels or the previous company you worked for.
However, if the interviewer is rude, dismissive and/or unpleasant, then you have to question if the company is right for you. If they treat you like this when they want the position filled, how will they be with you when you are in the position?
Always good to give the recruiter feedback too. They can feedback to the HR team who may not know about it and will be able to give the interviewer some training as I am sure they will not want the company brand and image being reflected in this way.
JSL - Recruitment...The right way.