Definition
Pair programming is an agile software development technique where two developers collaborate at one workstation. One developer, the driver, writes code while the other, the navigator, reviews each line as it is typed in, suggesting improvements and identifying defects. This continuous review process helps catch errors early, improves code quality, and fosters knowledge sharing among team members. For instance, a senior developer and a junior developer can pair program to transfer skills and ensure a new feature is built to high standards. Unlike informal code reviews that happen after development, pair programming integrates review directly into the coding process. This practice is frequently tested on the PMI-ACP and CAPM certifications, particularly within agile project management domains.