See there is no college in the country that will assure you for the permanent job. It is the caliber of the students that provide them a good packaged and secure job. If you are opting for the private sector jobs then it is totally your duty to make sure your position in the company for not getting fired. NITs might be providing you a better chances of unravelling yourself in the campussing by providing you a large no. Of options.
Hope this helps.