Guide: Understanding Code Readability in the PMI-ACP Exam

Code readability refers to how easily a developer or other team members can understand a written code. This is crucial in maintaining the code, updating it, and debugging it. There are certain factors that influences the readability of the code including clear logic, simplicity, comments explaining why a certain code behaves in a particular way, and refinement of code onto subroutines. It's also important to have consistent indentation and limited use of global variables.

Pair Programming, an agile software development technique, emphasizes the importance of code readability, given that two team members will be producing code collaboratively. These members switch roles between 'driver' (who writes the code) and 'observer' (who reviews each line of code written by the driver), improving the code's readability.

Exam Tips: Answering Questions on Code Readability

1. Familiarize yourself with a code readability checklist - this increases chances of identifying key features of readable code.
2. Understand that readability is not about the complexity of the code, but more about its clarity and ease of understanding.
3. Anticipate questions examining your understanding of how pair programming contributes to code readability.
4. Practice reading and understanding code - this gives you a practical sense of what makes code more readable.
5. Understand that good commenting practices is a part of code readability - comments should explain why something is done, not what is done, and should be kept up-to-date.