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 28981

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

IBM,

2 15376

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

IBM,

1 8337

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

IBM,

1 9057

What is the difference between sequential files and ESDS files?

IBM,

1 8822

How do you load a VSAM data set with records ?

IBM,

2 8264

How do you define a GDG ?

IBM,

1 5208

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

IBM, iNautix,

3 13709

How are different versions of GDG named ?

IBM,

2 5675

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

IBM,

2 14844

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 7064

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

IBM,

1 5931

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

IBM,

1 5878

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

1 7047

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

IBM,

1 9771

Un-Answered Questions { IBM MainFrame }

How jcl work to handle various input output file operations?

1228

What are the uses of db2 optimizer?

1366

how you can direct the data to spool using SYSOUT option?

1521

Explain about logical data model of idms?

955

Explain the system transid cemt?

1168

How to get the last record in vsam file in cluster? And how can u get the ksds file records into cobol program?

1097

what is the meaning of dynamic processing in vsam?

1117

What is the function of finish in idms?

978

in a jcl, a large volume dataset is loaded to a table using bmcload in step1 and an image copy of the loaded table is taken using bmccopy in step2. Step2 abends because the image copy dataset cannot hold the volume of the table. How can this be rectified?

1359

State the maximum value up to which volumes can be inserted to an stogroup?

1107

Explain index cardinality?

1119

Explain how to pass instream data in sysin with assembler?

1152

What is database descriptor?

1083

why should SYSIN DD * statement should not be included inside a PROCedure snippet??? please answer this.. i need to know.

2507

if we display var1 then what will b displayed in below condition. 77 var1 pic s9(2) value -10. 77 var1 pic s9(2) value -11. " " " -12. " " " -13. -14 ... ... -19.

6688

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