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Test-Driven Development

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Test-Driven Development (TDD) is an XP practice where developers first write the test cases for a specific functionality before writing the actual code to implement it. The idea is to ensure that every single piece of code is tested and validated before it is integrated into the larger codebase. Wi…

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Agile Project Management - Test-Driven Development Example Questions

Test your knowledge of Test-Driven Development

Question 1

A new team member is struggling to understand the benefits of Test-Driven Development (TDD). Which is the best approach to help them?

Correct Answer: Encourage them to pair program with a more experienced developer

Pair programming with a more experienced developer is a better approach as it will allow the new team member to get hands-on experience and guidance on TDD.

Question 2

In a scenario where a developer is recently introduced to TDD, he complains that it demands excessive code refactoring which makes the development time longer. What is your best advice to help him?

Correct Answer: Explain to him that refactoring helps in making the code more sustainable and maintainable and catching potential bugs earlier will ultimately reduce development time in the long run.

The best advice for a developer new to Test-Driven Development (TDD) complaining about excessive code refactoring is that refactoring is integral to TDD and it actually makes the code more sustainable and maintainable. It also emphasizes the importance of catching potential bugs earlier which will ultimately reduce development time in the long run. The other answers are not advisable. Ignoring refactoring goes against the principles of TDD and could lead to poor code quality. Similarly, going back to coding without TDD or refactoring only after the whole functionality is implemented also not recommended, as it defeats the purpose of TDD and its principles of code quality and early bug detection.

Question 3

The team has recently introduced TDD into their working process. Which scenario is an expected outcome?

Correct Answer: The overall number of bugs in the code decreases

One of the main benefits of TDD is that it results in fewer bugs in the code due to constant testing.

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