UML - Trial Exam

Which Use-Case element is missing from the diagram?

• pre- and post-conditions

• use-cases

• multiplicity

• system boundary

The arrow heads are missing for the include and extend associations.

Which direction should the arrow point to for the extend association?

• towards the extended association

• towards the extending association

• there is no arrow head needed

• both ends should have an arrow head

Can a tour be booked without an airplane ticket?

• yes, because they are separate use-cases

• yes, because this is always an option

• no, only a Travel Agent can do this

• no, since this option is only possible when booking an airplane ticket

Which statement about a use case diagram is true?

• it demonstrates the system's internal structure

• it describes the sequence of operations within the system

• it depicts the relationships between classes in the system

• it displays the interactions between users and the system

What type of Use-Case is Pay for Tour?

• primary

• secondary

• tertiary

• quadrary

There are two different tours that can be booked: a ‘relax tour’ and an ‘adventure tour’.

What is the best method to add the two use-cases Book Relax Tour and Book Adventure Tour, to the diagram?

• use an included association with Book a Tour

• use an extended association with Book a Tour

• use an inheritance association with Book a Tour

• create a new Use-Case diagram for booking a tour and use a actor-UseCase association

What are valid post-conditions for this use-case description based on the step-by-step plan?

• Credit card details are valid OR credit card details are invalid OR credit card details could not be validated

• System displays error OR system displays message

• System displays message

• Credit card details are known

What should be at X?

• Users

• Parties

• Actors

• Secondary actors

In what order will Passenger Boarding and Loading Luggage into Airplane be executed?

• Passenger Boarding first, then Loading Luggage into Airplane

• Loading Luggage into Airplane first, then Passenger Boarding

• they happen at the same time

• they can happen at the same time

Why are there two final nodes in this diagram?

• the post-conditions for each will be different

• you must always have at least two final nodes

• it is a mistake, there should only be one

• so there will be two different classes for the Class Diagram later