IBM MainFrame Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

COBOL (1072)
JCL (1031)
CICS (755)
DB2 (1122)

IMS (143)
IDMS (107)
Natural (81)
ADABAS (26)

REXX (60)
Assembler (68)
CLIST (6)
QMF (32)

MVS (25)
OS390 (10)
OS 2 (7)
VSAM (319)

IBM MainFrame Interview Questions

Questions Answers Views Company eMail

What happens when you open an empty VSAM file in a COBOL program for input?

IBM,

5 28718

How do you initialize a VSAM file before any operation? a VSAM with alternate index?

IBM,

2 15241

What does a file status of 02 on a VSAM indicate?

IBM,

1 8228

How do you calculate record size of an alternate cluster? Give your values for both unique and nonunique.

IBM,

1 8972

What is the difference between sequential files and ESDS files?

IBM,

1 8714

How do you load a VSAM data set with records ?

IBM,

2 8142

How do you define a GDG ?

IBM,

1 5126

Do all versions of the GDG have to be of the same record length ?

IBM, iNautix,

3 13492

How are different versions of GDG named ?

IBM,

2 5579

Suppose 3 generations of a GDG exist. How would you reference the 1st generation in the JCL?

IBM,

2 14712

Suppose a generation of GDG gets created in a particular step of a proc. How would you refer the current generation in a subsequent step? What would be the disposition of this generation now?

IBM,

2 6951

What more info you should give in the DD statement while defining the next generation of a GDG?

IBM,

1 5853

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

IBM,

1 5769

During processing of a VSAM file, some system error occurs and it is subsequently unusable . What do you do ?

1 6981

How do you fix the problem associated with VSAM out of space condition?

IBM,

1 9689

Un-Answered Questions { IBM MainFrame }

Write a program that uses move corresponding.

1156

At what point are extension eliminators mandatory?

1010

Explain how can return codes be tested before execution of a job step?

1332

What are the 2 sqlcodes that are returned?

1196

How can return codes be tested before execution of a job step?

1490

How is it possible to do a cross-sysplex copy of a PDS dataset by running one JCL on the target sysplex? I tried to use IEBCOPY with SUBSYS & CSM as follows: //CSMTRAN1 EXEC PGM=IEBCOPY //SYSPRINT DD SYSOUT=* //SYSUT1 DD DSN=PDS-Dataset-name-from,DISP=SHR, // SUBSYS=(CSM,'SYSPLEXNAME-FROM') //SYSUT2 DD DSN=PDS-Dataset-name-to,DISP=OLD, // SUBSYS=(CSM,SYSPLEXNAME-TO') //SYSIN DD DUMMY This did not work. I always get the following error "IEB1071E DD NAME SYSUT1 IS SUPPOSED TO BE A PARTITIONED DATA SET BUT IT HAS NO DIRECTORY. EXPECT A TERMINAL I/O ERROR. (DS1LSTAR=X'000000' DS1DSORG=X'0000' JFCDSORG=X'0200') " The source dataset is a catalogued pds dataset with many entries. The target dataset is allocated in the same job some lines before the transfer. I got an example like this for PS datasets with IEBGENER. But for PO datasets there should be a similar possibility...

4058

What is the comaera (communication area)?

1114

How to find all duplicate records?

1000

How many bytes will a s9(8) comp field occupy ?

1137

Can you define spufi?

918

What is the difference between a schema and a subschema?

1921

What is package in db2 mainframe?

994

Define autostatus in idms?

858

What are the utility programs in jcl?

1169

Particular area has been affected in cics screen, what is the process to find?

9903

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