In flow diagrams, what is represented by diamond boxes?

In flow diagrams, diamond boxes represent decisions. This is a key component of flowcharts, used to indicate points where a question is asked or a choice must be made that will affect the subsequent flow of the process. For example, a diamond might represent a question that could have a "Yes" or "No" answer, leading the flow in different directions based on the outcome. This helps in visualizing branching paths in a process, essential for understanding logic or decision-making in programming and algorithms.

The other options pertain to different elements of a flowchart: processes are typically represented by rectangular boxes, inputs/outputs are depicted with parallelograms, and the start or stop of a flowchart is denoted by oval shapes. Each shape has a specific purpose, which contributes to the overall clarity and functionality of the diagram.