A Level Computer Science OCR Practice Exam

In Extreme Programming, what is the significance of pair programming?

1. It allows for faster coding with less testing

2. It discourages team collaboration

3. It enhances focus on both code and design perspectives

4. It promotes written documentation

The correct answer is: It enhances focus on both code and design perspectives

In Extreme Programming (XP), pair programming plays a critical role by enhancing focus on both code and design perspectives. This practice involves two developers working together at one workstation: one writes the code while the other reviews each line as it's typed, providing guidance and insights. This collaborative approach fosters increased communication and collaboration, as both individuals can share their thoughts on design decisions and code improvements in real time. It leads to higher-quality code because mistakes can be caught early, and design considerations are discussed more thoroughly. Additionally, pair programming can facilitate knowledge sharing, promoting skill development and reducing the risk associated with having only one person familiar with a section of the codebase. The other options do not accurately capture the essence of pair programming in XP. Pair programming is not about faster coding with less testing; in fact, it often leads to greater accuracy and thorough testing since both programmers are actively involved. It also fosters collaboration rather than discouraging it, and while documentation is important in programming, pair programming primarily focuses on real-time collaboration and improvement of code quality, rather than promoting written documentation.