Tomson Group interview questions

Met with a HR then hiring manager. Both asked me the same questions. (Why you left last jobs, what do you know about the company, what else are you applying) Hiring manager asked me about my last field experience, strength/weakness, failure experience at jobs. (I couldn't provide failure..) It was unplesant to me when he asked me if I live with my parents then he said "oh you live with your family so you don't have any home loan. " It seemed that he would reduce my salary because I don't have morgage?