Diyar Consultants interview questions

The interview took place at the Cairo branch. The interview included two interviewers, one of the interviewers asked specific clear questions and the other one asked a design scenario without giving specific information or criteria, he kept converting the interview into a technical debate (when we reach a point of disagreement he provides more questions not a clarification of his point of view) also he kept giving me an impression that he isn't interested in the interview by using his mobile phone from time to time. The interview included direct clear questions in all low current systems (Fire Alarm, Public Address, Access Control, Data Network), For fire alarm they went into details related to devices functions and the standard. They aren't providing feedback regarding the interview result.