Mainframe Interview Questions and Answers
Ques 16. Explain the concept of a REXX (Restructured Extended Executor) in mainframes.
REXX is a programming language used for scripting and automation in the mainframe environment.
Example:
REXX script: ADDRESS TSO 'SUBMIT JOBNAME'
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Ques 17. What is the purpose of the IGGCSI00 utility in mainframes?
IGGCSI00 is a utility used for defining and managing the system catalog in a DB2 environment on mainframes.
Example:
IGGCSI00 JCL: //SYSIN DD * RUN PROGRAM(DSNTIAUL) PLAN(DSNTIUL1) ...
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Ques 18. Explain the purpose of the IDCAMS REPRO command in mainframes.
The IDCAMS REPRO command is used to copy data from one VSAM dataset to another in mainframes.
Example:
IDCAMS REPRO command: REPRO INFILE(IN_DATASET) OUTFILE(OUT_DATASET)
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Ques 19. What is the function of the SYNCSORT utility in mainframes?
SYNCSORT is a utility used for sorting, merging, and copying datasets similar to DFSORT in mainframes.
Example:
SYNCSORT JCL: //SORTSTEP EXEC PGM=SYNCSORT ...
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Ques 20. Explain the purpose of the JES (Job Entry Subsystem) in mainframes.
JES is a component in mainframes responsible for receiving, scheduling, and managing batch jobs.
Example:
JES command: //SYSOUT DD SYSOUT=A
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