How many no of question can we ask in stackoverflow ? Is there limit for that ? I am not talking about no of question per hour or minute but limit of total number question.And my second question is can we know about profile visitors ?
There is no limit to the number of questions you can ask on Stack Overflow. You can ask as many as you want. However, be sure that your questions are useful and belong on the site. If your questions are flagged as spam or offensive your account could be suspended.
Pretty much the only information you get about others visiting your profile is under your profile image on your profile page. It will tell you how many people have viewed your profile.