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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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Freshers / Beginner level questions & answers

Ques 1

Explain the purpose of COBOL in mainframes.

COBOL (Common Business Oriented Language) is a high-level programming language designed for business applications on mainframes.

Example:

COBOL code: MOVE 10 TO AMOUNT.
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Ques 2

Explain the concept of partitioned datasets in mainframes.

Partitioned datasets (PDS) are file structures in mainframes that store data in separate members or partitions.

Example:

JCL for PDS: //DDNAME DD DSN=MY.PDS,DISP=SHR
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Ques 4

What is the purpose of the DD statement in JCL?

The DD (Data Definition) statement in JCL is used to define the input and output data files for a job step.

Example:

DD statement: //INPUT DD DSN=INPUT.FILE,DISP=SHR
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Ques 5

What is the purpose of the IEFBR14 utility in mainframes?

IEFBR14 is a dummy utility used for job steps that do not require any processing, mainly for job control purposes.

Example:

IEFBR14 JCL: //STEP1 EXEC PGM=IEFBR14
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