True or False: If a node matches multiple node definitions, Puppet will use one of them without guarantee which one.

The statement is true because when a node matches multiple node definitions in Puppet, the behavior is such that Puppet does not have a predetermined method for selecting which matching definition to apply. This means that if a node defined in a Puppet manifest correlates with more than one node definition, Puppet will select one of them to apply, but it does not guarantee consistency regarding which one will be chosen in future runs. Therefore, it’s crucial for users to ensure their node definitions are distinct and well-managed to prevent unexpected behavior during Puppet runs.

This understanding highlights the importance of careful organization and specificity in defining node configurations to maintain control over how Puppet applies settings to nodes in different environments. While other options may suggest various levels of certainty or context, the inherent ambiguity in the selection process confirms that one cannot rely on predictable outcomes when multiple definitions exist for a single node.