Once i finish the graduation course in usa.can i look for a job there?or is there a restriction that i have to return to india as soon as

You are allowed to work for 29 months on OPT (Optional Practical Training) - without H-1B sponsorship if your degree is related to STEM (Science, Technology, Engineering, Mathematics). If you do MBA, you can work up to 1 year on OPT in USA. After that you will need H-1B visa (work permit) to work th

No there is no restriction like that. all you will need is a visa for working in the US. u can work anywhere in the world. good luck