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 28955

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

IBM,

2 15365

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

IBM,

1 8326

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

IBM,

1 9048

What is the difference between sequential files and ESDS files?

IBM,

1 8818

How do you load a VSAM data set with records ?

IBM,

2 8255

How do you define a GDG ?

IBM,

1 5201

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

IBM, iNautix,

3 13694

How are different versions of GDG named ?

IBM,

2 5666

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

IBM,

2 14829

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 7052

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

IBM,

1 5927

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

IBM,

1 5871

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

1 7043

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

IBM,

1 9765

Un-Answered Questions { IBM MainFrame }

Define the necessity of run stats among the environment test?

1059

i want to learn mainframe..any websites and material to learn from basic..? my mail id : rajeswaribe2010@gmail.com

2285

What is DEQ?

1115

how to access the file from prodution from changeman tool and to submit a file to production

7635

Tell about how do you eliminate the duplicates?

1070

Differentiate between cs and rr isolation levels? Where do you specify them?

1128

What is fset?

1071

what is the facility that allows mainframes to be partitioned into lapars? A.z/os b.pr/sm c.vitual storaged.coupling facility

1258

What is icm instruction?

1123

What is node in db2?

1106

What is the difference between perform … with test after and perform … with test before?

1504

What is a collection in db2?

1097

If a (+1) generation dataset is created in the first step of a job, how can it be referenced in later steps of the same job for input?

1388

What is the idd in idms?

1118

What is the meaning of a (new, catalog, keep) disposition mean?

1204

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