Eze Software Systems Engineer interview questions

Applied via job portals, got a call from Boston based HR. First round was kind of fluctuating as the interviewer was asking some irrelevant questions. Overally the interview was good and got the call for face to face round. Interview was straight forward and gone well. There was another face to face round with same interviewer and few other folks. Finally there was a director level interview without many questions.. HR round was around salary negotiations was not tough though because expectation was communicated well before. Finally got the job offer. 3 rounds + 1 HR round