Final answer:
When merging update sets and an object has updates in both, a conflict occurs, prompting the user to decide which update to prioritize for the final merged set.
Step-by-step explanation:
When merging update sets in a platform like ServiceNow, if an object has an update in both sets, a conflict is identified. During the merge process, the system needs to resolve these conflicts. It typically does this by prompting the user to decide which update to prioritize. The chosen update will then be applied to the final merged set. If no manual resolution is made, the default behavior depends on the specific system's conflict resolution mechanism, which can either be to keep both updates and manually resolve, or automatically overwrite one update with the other based on rules such as timestamp or version hierarchy.