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Q:

How do you check the syntax of a JCL without running it?

Answer

TYPERUN=SCAN on the JOB card or use JSCAN.


TYPERUN=HOLD on the job card.


it is used for syntatical checks and direct job to spool and hold it.

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Subject: Mainframe Interview

Q:

What are the difference between in-stream procedure and inline procedure in JCL ?

Answer

An in-stream PROC is defined right in the jcl stream and doesn't reside in the proclib. This is an older technique associated with punched cards but it is still in use with setup and installation programs from vendors.


for the in-line perform instead of:


perform add-paragraph until switch = 'y'


you can code


perform until switch = 'y'


body of code


end-perform


body of code is the code from add-paragraph appearing in-line (ie right in the perform) instead of in a separate paragraph (out of line code)

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Subject: Mainframe Interview

Q:

How will you call the return code of JCL ?

Answer

Return Code in JCL can b obtained by the use of COND paramater...it is used to know the return codes of previous steps.

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Subject: Mainframe Interview

Q:

What is the use of SYSPRINT, SYSIN, DUMMY in JCL ?

Answer

SYSPRINT: All system output will appear under this DD card. Suppose you are copying a VSAM file using IDCAMS. Then, number of records processed, highest condition code etc.. will appear under sysprint. You cannot customise SYSPRINT output.


SYSIN: This is nothing but SYStem INstruction. Suppose, you want to sort a file on certain key. You have to have following command under SYSIN.


SORT FIELDS = (starting-col,length,data-type,A/D)


SUM FIELDS = NONE


DUMMY: Mainly used where user is intended to simulate a program without creating an output file.

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Subject: Mainframe Interview

Q:

Assuming that the DEFINE JCL is not available, how do you get info about a VSAM files organisation?

Answer

Use the LISTCAT command.

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Subject: Mainframe Interview

Q:

In the JCL, how do you define the files referred to in a subroutine ?

Answer

Supply the DD cards just as you would for files referred to in the main program.

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Subject: Mainframe Interview

Q:

How do you define a sort file in JCL that runs the COBOL program?

Answer

Use the SORTWK01, SORTWK02,..... dd names in the step. Number of sort datasets depends on the volume of data being sorted, but a minimum of 3 is required.

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Subject: Mainframe Interview