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 28658

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

IBM,

2 15206

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

IBM,

1 8193

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

IBM,

1 8951

What is the difference between sequential files and ESDS files?

IBM,

1 8689

How do you load a VSAM data set with records ?

IBM,

2 8107

How do you define a GDG ?

IBM,

1 5104

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

IBM, iNautix,

3 13460

How are different versions of GDG named ?

IBM,

2 5553

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

IBM,

2 14687

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 6926

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

IBM,

1 5833

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

IBM,

1 5755

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

1 6968

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

IBM,

1 9678

Un-Answered Questions { IBM MainFrame }

What are the various isolation levels possible?

1116

EXPLAIN MAIN FRAME TESTING PROCESS...HOW TO FIX THE MAINFRAME BUGS?

2537

Write a program to enter and display the names of students in a class using the occurs clause.

1202

What is the physical storage length of timestamp data type?

1088

Explain ibm z?

1008

What is page size in db2?

971

what is the meaning of a (new, catlg, keep) disposition mean?

1016

How is record management performed in vsam?

1138

Mention the option used in a cics command to retrieve the response code after execution of the command?

1099

How do you define an altindx?

1038

How can you do the explain of a dynamic sql statement?

1069

is oorexx compatible with rexx?

940

I have many files which i am receiving from client everyday. I have one step for every file to check for empty or not. Here client gives 30 files i need to check for every file for empty or not and i need to perform 30 steps. Can I do it in single step. Dynamically i need to change the File name in my step.

1210

Explain the significance of dbid used in adabs?

949

Mention the location where the output received from explain statement is stored.

1125

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