Model-Based Strategies CTEL-TM-SM Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   After implementing model-based testing, a test manager wants to compare its effectiveness with the previous scripted approach. Which analysis would provide the most meaningful comparison?

   • ACompare the number of testers who prefer each approach.
   • BCompare defect detection rates per test case and the number of defects found in production over a defined period.
   • CCompare the number of test cases executed per day.
   • DCompare the total cost of the testing tools.
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2. 12expert · hard

   A safety-critical system has a state machine model with 200 states and 600 transitions. The team must demonstrate rigorous coverage to a regulator. They have a fixed test execution budget that allows only 150 test cases. Which approach best balances coverage and budget?

   • AUse transition coverage, which will require at least 600 test cases, and negotiate for a larger budget.
   • BUse state coverage, which requires only 200 test cases, and accept the lower coverage.
   • CUse a search-based generation technique to optimize the test suite to cover as many transitions as possible within the 150-test budget.
   • DUse random generation and hope that 150 tests cover the most critical transitions.
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4. 13application · medium

   A test manager is introducing model-based testing into an organization that has a mature scripted testing process. The team is concerned about the learning curve and the risk of losing the ability to reproduce specific test steps. What is the most effective adoption strategy?

   • AUse MBT only for new features and leave existing features untested.
   • BReplace all scripted tests with MBT immediately to avoid maintaining two test suites.
   • CPilot MBT on a small, well-understood module and keep the existing scripted tests for regression until the team gains confidence.
   • DTrain the team on MBT theory first and delay any practical implementation until training is complete.
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5. 14foundation · easy

   What is the primary purpose of using coverage criteria in model-based test generation?

   • ATo generate test cases randomly without any specific goal.
   • BTo define a stopping point for test generation by ensuring that certain model elements are exercised.
   • CTo ensure that all possible test cases are executed.
   • DTo eliminate the need for test oracles.
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6. 15application · medium

   A payments platform is replacing a suite of manual regression scripts with model-based testing. The team has built a state machine model of the payment workflow. During a review, a tester points out that the model omits the 'refund after settlement' path, which is a critical business rule. What is the most appropriate action for the test manager?

   • ASwitch to a decision table model because it better captures business rules like refunds.
   • BAsk the developer to add a unit test for the refund path and rely on code coverage to catch regressions.
   • CUpdate the state machine model to include the missing transition and regenerate test cases from the revised model.
   • DAdd a manual test case for the refund-after-settlement path and keep the model unchanged to avoid rework.
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