Persistent Systems Senior Systems Administrator interview questions

the consultancy arranged a first round over the phone after getting all the information from me which was not mentioned in the resume. Also the consultancy could arrange this within 2 days and also conveyed the result within a days time. There were 2 people who interviewed me and regarding the feature difference question I could not answer that rather the interviewer also did not know. I strongly believe that is something what can be googled whenever needed and no need to remember such things.