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making no use of actor generalization. Do the two versions of the diagram describe the same facts, from the point of view of the restaurant's operations? Which diagram do you find clearer and easier to understand? Extend the description of the 'Record booking' use case described in Lesson 3 to cover the situation where the receptionist tries to double-book a particular table. Would this be an alternative or an exceptional course of events? Record Booking: Basic Course of Events (revised) 1. receptionist performs Display Bookings; 2. receptionist enters details; 3. system records and displays new booking. Use the editor to format your answer Question 3 How detailed a use case description should be? What is the correct meaning of the below diagram? (A) The use case A may not necessarily be performed every time B is performed; (B) The use case A has to be performed every time B is performed; The use case B has to be performed every time A is performed; None of the above. Question 5 The use case view is NOT used for: describing the internal behavior and the actual computations of the system; describing the externally visible behavior of the system; describing how users interact with the system : comprising all the possible interactions that a user can have when performing a given task; being often a dialogue between system and user