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Which is a valid method of logging messages to the execution log in APEX applications?
Correct Answer: A
Logging in APEX tracks runtime activity: A . apex_automation.log_info: Correctly logs an informational message to the execution log for automation tasks (e.g., workflows). The syntax || :ENAME || concatenates the item value (e.g., "JOHN") into "SAL for JOHN increased by 19." It's stored in APEX_AUTOMATION_LOG, viewable in Monitoring. B . apex_debug.info: Logs to debug output, but the syntax is flawed (:ENAME || isn't concatenated properly; should be 'SAL for ' || :ENAME || ...). It's valid only when debugging is enabled (e.g., APEX_DEBUG.ENABLE). C . apex_error.add_error: Adds an error to the error stack for user display, not a log message. Technical Insight: log_info is non-intrusive, unlike apex_debug, which requires debug mode, or apex_error, which signals failure. Use Case: Logging salary updates in a scheduled job without debug overhead. Pitfall: Ensure :ENAME is in scope (e.g., page item).
