Quality Characteristics for MBT Models CT-MBT Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   After an assessment reveals that an MBT model has several unreachable states, which improvement is most appropriate?

   • AIgnore the unreachable states because they do not affect test generation
   • BDocument the unreachable states as known limitations in the model
   • CAdd more transitions to make the unreachable states reachable
   • DRemove the unreachable states and any transitions that lead only to them
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   When assessing the consistency of an MBT model, which of the following is a typical activity?

   • AVerifying that the model does not contain contradictory states or transitions
   • BConfirming that every requirement has at least one corresponding model element
   • CEnsuring that the model is easy to read and understand for stakeholders
   • DMeasuring the number of test cases generated from the model
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4. 13expert · hard

   A team is assessing two different models of the same system: one is a state machine and the other is a decision table. The state machine is complete and consistent, but the decision table has a few inconsistencies. The team has limited time and must decide which model to use for test generation. What is the most appropriate decision?

   • AUse the state machine because it is complete and consistent, and fix the decision table later if time permits.
   • BUse the decision table because it is easier to generate tests from a table format.
   • CUse both models and merge the generated tests, discarding any that conflict.
   • DDiscard both models and create a new one from scratch to ensure consistency.
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A model-based testing team is reviewing two different models of the same system: a state machine and a decision table. The state machine says that a certain action is only allowed when a user is 'admin', while the decision table says the action is allowed for both 'admin' and 'manager'. Which quality characteristic is most directly compromised?

   • ACompleteness — the decision table is missing the 'admin' role.
   • BConsistency — the two models disagree on the same business rule.
   • CCorrectness — the state machine is wrong because it excludes 'manager'.
   • DMaintainability — the two models are too complex to maintain.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   An assessment of a state-machine model reveals that several states are unreachable from the initial state due to a guard condition that can never be satisfied. The team wants to improve the model's quality. What is the most appropriate improvement action?

   • AIncrease the test coverage criteria to force the generator to include those states.
   • BRemove the unreachable states from the model to simplify it.
   • CCorrect the guard condition so that the affected states become reachable, then re-run the reachability analysis.
   • DAdd a new transition from the initial state directly to each unreachable state.
   Reveal Solution Discussion Select an answer first