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 28696

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

IBM,

2 15224

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

IBM,

1 8216

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

IBM,

1 8964

What is the difference between sequential files and ESDS files?

IBM,

1 8699

How do you load a VSAM data set with records ?

IBM,

2 8128

How do you define a GDG ?

IBM,

1 5114

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

IBM, iNautix,

3 13479

How are different versions of GDG named ?

IBM,

2 5572

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

IBM,

2 14700

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 6938

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

IBM,

1 5845

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

IBM,

1 5767

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

1 6975

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

IBM,

1 9684

Un-Answered Questions { IBM MainFrame }

Explain the advantage of dynamic generation of acb?

3199

Why include statement is used in a jcl?

1184

How to override loadlib?

2040

How to find all duplicate records?

983

How can tablespace be moved to another dasd volume that is allocated for that tablespace?

1240

Have you used the sort in your project?for this type of questions any working on real time project give the eg. with real time scenario.

2435

What does sqlcabc has?

1058

What is a vsam dataset?

1033

What action db2 takes when a program aborts in the middle of a transaction?

1156

Define an asra abend?

1079

Can you explain differences between temporary storage queue (tsq) and transient data queue (tdq)?

1086

When the like statement is used?

1222

what do you mean by the repro command?

1099

What is an ims database?

1146

What is cloudant database?

1100

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