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WithoutBook LIVE Mock Interviews Mainframe Related interview subjects: 74

Interview Questions and Answers

Know the top Mainframe interview questions and answers for freshers and experienced candidates to prepare for job interviews.

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The Best LIVE Mock Interview - You should go through before interview

Know the top Mainframe interview questions and answers for freshers and experienced candidates to prepare for job interviews.

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Experienced / Expert level questions & answers

Ques 1

Explain the function of CICS (Customer Information Control System) in mainframes.

CICS is a transaction processing system that provides services for running applications concurrently on mainframes.

Example:

CICS command: EXEC CICS READ FILE(...)
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Ques 2

Explain the concept of a mainframe 'region'.

A mainframe region is a logical partition where programs and data are executed and managed independently.

Example:

region definition in JCL: //REGION1 EXEC PGM=PROGRAM1,REGION=4M
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Ques 3

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 4

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 5

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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