To quickly adapt to changing customer requirements, the development team is using __________, an Agile methodology that focuses on improving software quality and adaptability to changing customer requirements. It emphasizes practices such as pair programming, test-driven development (TDD), continuous integration, and frequent releases to ensure rapid delivery of reliable software.
(On the actual PMI-ACP exam, you may be asked to type the letter into the blank spot. But here, please select the answer below.)

A. Scrum
B. Kanban
C. Extreme Programming (XP)
D. Lead Development

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HINT: Remember this Agile methodology is known for its emphasis on engineering practices that enhance software quality and adaptability. It includes practices like pair programming, test-driven development (TDD), continuous integration, and frequent releases.

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Answer and Explanation:
The correct answer is C.

Extreme Programming (XP) is an Agile methodology designed to improve software quality and responsiveness to changing customer requirements. It emphasizes engineering practices such as pair programming, test-driven development (TDD), continuous integration, and frequent releases to ensure rapid delivery of reliable software. XP is particularly suitable for projects with constantly changing requirements and a need for close collaboration with the customer.

In summary, Extreme Programming (XP) is designed to enhance software quality and responsiveness through practices that support rapid delivery and close customer collaboration. It is particularly effective in high-pressure environments where requirements are dynamic, and customer feedback is crucial for success.

Details for each option:

A. Incorrect. Scrum provides a framework with roles (Product Owner, Scrum Master, Developers), events (sprint planning, daily scrum, etc.), and artifacts (backlog, increment). While it supports iterative delivery, it does not prescribe technical practices like pair programming, TDD, or continuous integration.

B. Incorrect. Kanban focuses on visualizing workflow, limiting work in progress, and improving flow efficiency. It helps manage tasks and optimize delivery but does not include engineering practices for improving code quality.

C. Correct. Extreme Programming (XP) is an Agile methodology that enhances software quality and adapts to changing customer needs by applying practices like pair programming, test-driven development (TDD), continuous integration, and refactoring for faster, reliable delivery.

D. Incorrect. Lean emphasizes eliminating waste, optimizing the whole, and delivering value quickly. It’s a broader philosophy rather than a methodology with specific software engineering techniques like TDD or pair programming.

Reference: Agile Practice Guide - First Edition, Project Management Institute Inc., 2017, A3.3 EXTREME PROGRAMMING