Hi @rdamuluri - welcome to the community 
Can you clarify what you are asking? I’m not sure what your first question means. In the second question, are you asking if it is possible to import a data file for each individual request in the collection, and then have the collection run? If so, what are you hoping to accomplish? Perhaps there is a better way.
If you can provide more details of what you are hoping to accomplish, we’ll be able to help you much better. Here’s an example of what details could be helpful.