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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:

What are the steps you go through while creating a COBOL program executable?

Answer

DB2 precompiler (if embedded sql used), CICS translator (if CICS program), COBOL compiler, Link editor. If DB2 program, create plan by binding the DBRMs.

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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

Q:

Specify the CICS command used to read a VSAM record starting with prefix F. Code all the relevant options?

Answer

EXEC CICS READ


DATASET('FILENAME')


INTO(data-area)


RIDFLD(data-area)


KEYLENGTH(1)


GENERIC


LENGTH(WK-LEN)


END-EXEC.

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Subject: Mainframe Interview

Q:

The EIB field which gives the last CICS command executed is?

Answer

EIBRCODE

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Subject: Mainframe Interview

Q:

What CICS command do you need to obtain the user logon-id?

Answer

You must code EXEC CICS ASSIGN with the OPENID option.


 

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Subject: Mainframe Interview

Q:

Name some of the common tables in CICS and their usage?

Answer

PCT (Program Control Table) - Defines each transaction containing a list of valid transaction identifiers (transid) where each transaction is paired with its matching program.


PPT (Program Processing Table) - Contains a list of valid program names and maps and whether a current version is in the CICS region or needs to be brought in as a new copy.


FCT (File Control Table) - Contains a list of files known to CICS, the dataset name and status (closed/open, enable/disabled)


TCT (Terminal Control Table)- A list of the terminals known to CICS.

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Subject: Mainframe Interview

Q:

What is the CICS LOAD command ?

Answer

The LOAD command retrieves an object program from disk and loads it into main storage - it's primarily used for a constant table that will be available system-wide.


 

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Subject: Mainframe Interview