Since I am coming from a relational DB world, wanted to know if there is an option to ROLLBACK the DELETE. Will there be a necessity to COMMIT the changes.
Questions like these are not handled in M001. May I suggest that you turn to the MongoDB online documentation? The documentation really is quite good.
Just Google for the details you’re looking for.
Based on the relevant manual page, it seems that manual commits are not required, unless you are doing particular things in multi-document transactions.