3. Describe the Concepts of Test-Driven Development 200-901 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A team's CI pipeline reports 85% line coverage for a Python library that parses IOS XE show commands. A manager asks whether the library is adequately tested. What is the most accurate response?

   • AThe team should increase coverage to 100% before considering the library tested
   • BCoverage indicates which lines were executed, but it does not guarantee that all critical behaviors were verified
   • CCoverage is irrelevant because TDD ensures all code is tested
   • D85% coverage means the library is adequately tested and ready for production
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2. 12application · easy

   A network automation team is debating whether to adopt TDD for a new project. They value maintainable code that can be safely changed. Which benefit of TDD most directly supports this goal?

   • AThe test suite acts as a safety net that allows confident refactoring
   • BTDD eliminates the need for code reviews
   • CTDD reduces the need for documentation
   • DTDD guarantees zero defects in production
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4. 13application · medium

   A developer is writing unit tests for a module that retrieves device configuration via NETCONF. The module depends on a live network device. To test the module in isolation, what should the developer use?

   • AA test double that logs all network traffic for debugging
   • BA real NETCONF session to a lab device to ensure accurate behavior
   • CA mock object that simulates the NETCONF session and returns a predefined configuration
   • DA stub that only verifies the module's method calls without returning data
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5. 14foundation · easy

   What is the role of test automation in a continuous delivery (CD) pipeline?

   • ATo replace the need for staging environments
   • BTo manually review code before deployment
   • CTo generate release notes automatically
   • DTo ensure that only code passing all tests is deployed
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6. 15foundation · easy

   Which statement correctly describes the 'red' phase in the TDD cycle?

   • ARefactor the code to remove duplication and improve readability
   • BRun the test suite to ensure all tests pass
   • CWrite production code first, then write a test to verify it
   • DWrite a test that fails because the required functionality does not exist yet
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