Unity Certified Associate Game Development Practice Exam 2025 - Free Game Development Practice Questions and Study Guide

In Unity, the default behavior of buttons in response to mouse hover is to change color. This visual feedback helps users understand that the button is interactive, signifying that it can be clicked. The Unity UI system typically employs the use of different color states to indicate various interactions such as normal, highlighted, pressed, and disabled. When the mouse hovers over the button, the highlighted state is activated, which often involves changing the button's color to make it more visually distinct. This feature enhances the user experience by providing immediate visual cues about the button's state.

Other behaviors, such as playing a sound or triggering an event, are not default settings for mouse hover but can be programmed into the button's functionality if desired. Disabling the button does not correlate with hover behavior and instead signifies that the button is not available for interaction, which is not a default action during a mouse hover event.