Companies like IBM, SAP etc commonly ask conceptual questions to candidates in interviews. The questions may not be very technical or technology specific, but these test a candidates basic knowledge in depth. Today, I am discussing one such question which was asked to one of my colleagues who attended an interview. Q). What is the difference between rescheduling and back order processing? Answer: The question just requires a candidate to explain the concepts of Rescheduling and Backorder processing. Backorder Processing - Backorder processing is the processing of a backorder. Now, a backorder means a sales order which has not been confirmed in full or has not been confirmed at a certain delivery date. Rescheduling - Rescheduling on the other hand is a proposal which can enable confirmed quantities already assigned to sales orders might be reassigned to other orders. This reassignement may be required due to an order of higher priority which may require an earlier delivery date. Big4guy Tip: For candidates appearing for interviews I recommend you get your basic concepts right. There is a growing trend to ask basic conceptual questions even in technical interview.