You have a JCL job with multiple job steps. If one of the steps fails, explain the process of handling and diagnosing the error during execution.

In a JCL job with multiple steps, if one step fails, the system can be configured to attempt to restart the failed step based on predefined conditions. This process is handled by the system's restart and recovery mechanisms. Diagnosing the error involves reviewing system logs, error messages, and job output to identify the cause of the failure. Depending on the severity of the error and the configured job settings, the system may either continue with subsequent steps or terminate the job. Understanding these error handling and diagnostic processes is crucial for effective JCL job management and troubleshooting.