A staple in Infosys interview questions with answers, be prepared to answer this one. Yes, I would recommend drawing two separate diagrams. The first is a use-case, and the second is an actor diagram. So that we can highlight all possible activities in a use case and in an actor diagram, and then combine both diagrams to create an effective use-case diagram.  The pair-Choice Technique is used to prioritize different items in a process. It is mostly used when there are multiple stakeholders involved in the project. The group is asked to compare each item to others and choose the one with the highest priority.