Under the default Mule configuration, which log level is enabled?

• A. DEBUG
• B. ERROR
• C. TRACE
• D. INFO

Answer: (B)

In logging, messages are shown based on a configured severity level, and the logger emits all messages at that level or higher. Under Mule’s default configuration, the root log level is set to ERROR. This means only error messages (and more severe entries, if any) are written to the logs, while less severe messages like INFO, DEBUG, or TRACE are not shown unless you raise the log level.

This sensible default keeps logs concise, highlighting real problems without drowning you in routine operational information. If you need more visibility for troubleshooting, you can adjust the log level to INFO or DEBUG in the logging configuration or via the runtime management tools to capture more detail.