Educational Loans for Engg. Bachelor's Degree courses?

Is it not at the discretion of the Banker to demand monthly interest payments subsequent to sanction of Educational loans(for Bachelors) and against the GoI tenets. What is to be done to secure Edu. Loans with repayment per established policy(ie., repayment upon completion of degree and securing employment).Where can one get a Govt. Policy (document URL) directions to banker's advancing Educational Loans for reference. ** implied jurisdiction is India.