JCL 面试题与答案
问题 11. What is the purpose of the TIME parameter in JCL?
The TIME parameter is used to specify the maximum amount of CPU time allocated to a job step. If the time limit is exceeded, the step is terminated.
Example:
//STEP1 EXEC PGM=XYZ,TIME=5
问题 12. Explain the function of the REGION parameter in JCL.
The REGION parameter is used to specify the amount of virtual storage (memory) allocated to a job step. It helps prevent storage-related errors.
Example:
//STEP2 EXEC PGM=ABC,REGION=4M
问题 13. What is the significance of the NOTIFY parameter in JCL?
The NOTIFY parameter is used to specify the user who should receive job completion or error messages. It is used for notification purposes.
Example:
//JOBNAME JOB ...,NOTIFY=USERID
问题 14. How do you override a cataloged procedure in JCL?
To override a cataloged procedure, you can use the PROC parameter in the EXEC statement, providing the necessary parameter values.
Example:
//STEP1 EXEC PROC=MYPROC,REGION=2M
问题 15. What is the meaning of the COND parameter value 'EVEN' in JCL?
The COND parameter value 'EVEN' is used to conditionally execute a job step only if the return code of the previous step is an even number.
Example:
//STEP3 EXEC PGM=DEF,COND=(EVEN)
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