If you are really strong in the subject there won't be any question instead of that you can play with the company otherwise they will play with your career also. Company rules will keep on changing depending on the person. You can not expect salary for a particular month it may come or may not come. You have to postpone all your expenses till you get your salary.it make take one month or two or three or four or five or six months later.you should not ask the management about your salary if you ask they will remove you from your job.what else you want me to say. Only who want job experience they will get a very good experience in all the ways. Those who worked previously in this company got good jobs in reputed companies by their hardwork only.