Test First Development

Correct Answer: Write the tests first before writing the functional code

The best approach to undertake in an Agile project, considering the Test First Development principle, is to 'Write the tests first before writing the functional code'. This approach aligns with the principle, which promotes the writing and passing of tests before functional code is implemented. It ensures a comprehensive understanding of requirements and each feature's desired output, leading to a well-defined and testable code. On the other hand, the other approaches are not in alignment with the Test First Development principle. 'Writing the functional code first then carrying out the tests' is a traditional approach, which doesn't inherently address the possible misunderstandings in requirements. 'Writing the tests and functional code simultaneously' would be challenging and introduces the risk of missing important test cases, while 'Skipping the tests and focus more on writing functional code' completely disregards the important role of testing in software development, especially in Agile, which could lead to diminished software quality.

Correct Answer: Make small changes backed up by tests and show the working software after each change

The best approach when incorporating Test-First Development is to 'Make small changes backed up by tests and show the working software after each change'. Test-First Development promotes writing tests before the software, which ensures that each small piece of code is functioning as expected before moving on to the next one. Sticky Discussions with clients are easier when there's running software to demonstrate, and small changes mean you can show progress after each meeting without compromising on testing. 'Show them the functional code without running any tests' would go against the principles of Test-First Development. Tests are crucial to ensure the functionality is working as expected. 'Make bigger changes to show significant improvements', while it might seem impressive, doesn't adhere to the principles of Agile Development which prioritizes incremental changes, frequent feedback and adaptability. Larger changes also present a higher risk of bugs and issues. 'Do not write tests but focus on producing something to show the client' is not a good practice in software development. The absence of tests can lead to missed bugs and faulty functionalities, compromising the overall quality of software product.

Correct Answer: Identify where the bug is and write a test that reveals it

In the context of bug-saturated system repair within the framework of Test First Development, the most appropriate strategy would be to 'Identify where the bug is and write a test that reveals it'. This approach aligns more with Agile principles which place a high value on rapid feedback, iterative development, and the reduction of upfront planning. The tests become a method of specifying what needs to be corrected. Rewriting the whole system (although sometimes necessary in extreme cases), is usually not the first choice as it can be a time consuming task that may introduce more bugs. Delegating the entire task to the most experienced coder isn't optimal either since Agile promotes shared responsibility and collective ownership. Lastly, randomly writing tests to find the bug is not the most effective or efficient strategy, as the focus should be on identifying and writing specific tests for known issues.