Unit Testing

Correct Answer: Review and enhance your unit testing process to ensure it's rigorous and comprehensive. Look into better test design and ensure all code is tested.

The most appropriate approach when dealing with frequent bugs in code that has passed unit testing is to review and enhance the unit testing process. This could include improving test design, ensuring all code is adequately tested, and revisiting test coverage. This option prioritizes quality and effectiveness of the testing process over speed, which aligns with Agile principles. The other answers are not the best solutions since skipping unit tests or ignoring the bugs could lead to major problems down the line, and assigning more resources to writing code and fewer to unit testing does not address the real problem, which lies in the quality and thoroughness of the tests being run.

Correct Answer: Explain that Unit Testing helps detect issues early in the development cycle, which reduces costs and time to rework.

Unit testing is a type of software testing where individual units or components of a software are tested. The objective is to validate that each unit of the software performs as designed. The first answer - 'Explain that Unit Testing helps detect issues early in the development cycle, which reduces costs and time to rework.' is the best answer, because unit testing plays a critical role in the early detection of software bugs, reducing the cost and time of reworking. The second one - 'Unit Testing is necessary for achieving higher developer salaries.' is wrong, because while unit testing indeed contributes to a developer's efficiency and can be a valuable skill, it is not the deciding factor for high salaries. The third one - 'Unit Testing will make the team look more experienced.' is incorrect. Unit testing might increase the professionalism of the team, but it will not make them look more experienced. Experience is gathered over time and with the variety of tasks handled not merely by performing a particular type of test. The fourth one - 'Unit Testing is a compulsory process for Agile certification and that's the only benefit.' is incorrect. Although unit testing is an important aspect of Agile methodology, claiming that it's the 'only' benefit is a false statement, it has many other benefits such as the improvement of the software's overall quality and maintainability.

Correct Answer: You should conduct Unit Testing on the new feature to test individual components for different scenarios.

The best practice in a PMI Agile environment after developing a new feature for a web application would be to conduct Unit Testing on the new feature. This is the preferred approach as it tests individual components of the feature for different scenarios to ensure they work as expected under varying conditions. Unit testing is fundamental in an Agile environment, as it emphasizes incremental and iterative development with testing at each phase. Directly deploying the feature and getting user feedback is not recommended because feedback could become overwhelming and mismanaged, potentially missing critical bugs. Developing the next feature without testing the current one is against Agile principles of iterative development and continuous testing. Conducting stress testing at first could be helpful but, unit testing is generally fundamental and conducted before any other testing methods.