Misleading Expectations and Pitfalls of MBT CT-MBT Practice Questions (Page 5)

Questions 21–25

1. 21expert · hard

   A test lead proposes using MBT to generate all regression tests for a system. The team expects that the tool will automatically create tests that cover all possible combinations of inputs and states. After implementation, they find that the number of generated tests is enormous and many are redundant. What is the most likely reason for this problem?

   • AThe test oracle is not filtering out redundant tests.
   • BThe model is too detailed and includes unnecessary states and transitions.
   • CThe team should have used a different MBT tool.
   • DThe MBT tool is generating tests incorrectly.
   Reveal Solution Discussion Select an answer first
2. 22application · medium

   A small team of manual testers is assigned to implement MBT. They have no prior experience with formal modeling or state machines. Management expects them to produce a working model of a complex legacy system within two weeks. What is the most realistic risk they will face?

   • AThe legacy system is too old to be tested with MBT.
   • BThe two-week timeline is too short because MBT always requires months of preparation.
   • CThe team will struggle due to a lack of specialized modeling and MBT skills.
   • DThe MBT tool will automatically generate the model from the legacy code.
   Reveal Solution Discussion Select an answer first
4. 23foundation · easy

   What is a likely consequence of not maintaining the MBT model as the system evolves?

   • AThe generated tests will become outdated and may no longer match the actual system behavior.
   • BThe model will automatically update itself to reflect the changes in the system.
   • CThe MBT tool will stop generating tests until the model is updated.
   • DThe test results will remain valid because the model is independent of the system.
   Reveal Solution Discussion Select an answer first
5. 24expert · hard

   A company has invested heavily in an MBT tool that generates tests in a format that is not compatible with their existing test management and reporting tools. The team must manually transfer results, which is error-prone and time-consuming. The project is at risk of failing its quality goals. What is the most effective strategy to mitigate this risk?

   • AReplace the existing test management system with one that supports the MBT tool.
   • BAbandon MBT and return to manual testing.
   • CContinue with manual transfer and accept the risk.
   • DDevelop a custom converter to bridge the MBT tool and the test management system.
   Reveal Solution Discussion Select an answer first
6. 25foundation · easy

   Which of the following is a realistic expectation about the costs and benefits of MBT?

   • AMBT requires a significant initial investment in modeling and training, but can lead to long-term benefits such as reduced maintenance effort for test cases.
   • BMBT will immediately reduce testing costs and provide a high return on investment from the first project.
   • CMBT has no costs because the tools are free and open source.
   • DMBT always provides a higher return on investment than manual testing.
   Reveal Solution Discussion Select an answer first