The disp in the JCL is MOD and the program opens

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The disp in the JCL is MOD and the program opens the file in OUTPUT mode

Q: The disp in the JCL is MOD and the program opens the file in OUTPUT mode. What happens? The DISP in the JCL is SHR and the program opens the file in EXTEND mode. What happen ?

Answer
: Records will be written to end of file (append ) when a WRITE is done in both cases.

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Other Job Interview Questions

• When should DISP = MOD is used?
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• Why do you want to specify the REGION paramter in a JCL step?
• What is model dataset label ( Model DSCB ) ?
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• How do you send the output of a COBOL program to a memeber of a PDS ?
• What does the TIME parameter signify ? What does TIME = 1440 mean ?
• What is S0C7 abend?
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• How to pass the tamp dataset form one JOB step to another?
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