3. Describe the Concepts of Test-Driven Development 200-901 Practice Questions (Page 10)

Questions 46–48

1. 46expert · medium

   A developer is using TDD to build a function that parses Cisco IOS show commands. They write a test for a new feature, run it, and it fails. They then implement the feature and the test passes. However, they notice that the code has a redundant if-else block. What should the developer do next?

   • ALeave the code as is to avoid breaking the passing test
   • BRefactor the code to remove the redundancy and re-run the test suite
   • CDelete the redundant block and commit without re-running tests
   • DWrite another failing test before refactoring
   Reveal Solution Discussion Select an answer first
2. 47application · medium

   A network automation team uses a CI pipeline that runs unit tests and reports code coverage. After a recent sprint, coverage dropped from 85% to 60%. The team wants to ensure new code is adequately tested. Which action is most effective?

   • ARun tests only on the main branch to save CI time
   • BIncrease the number of assertions in existing tests
   • CSet a coverage threshold in the CI pipeline to fail builds below 80%
   • DRemove tests for legacy code to reduce maintenance burden
   Reveal Solution Discussion Select an answer first
3. 48foundation · easy

   What is the primary goal of refactoring in test-driven development?

   • ATo add new features to the code
   • BTo improve code structure without changing its behavior
   • CTo increase test coverage
   • DTo fix bugs that were found by the tests
   Reveal Solution Discussion Select an answer first