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

Can we use empty VSAM as input?

Convergys, Kanbay,

9 27098

What is the use of TRT instruction and how it is working?

HCL, IBM, Wipro,

7 34316

What is GDG and what is the maximum limit of versions that can be created?

Convergys,

9 49227

What is the use of the utility DFSRRC00 in the JCL?

Convergys,

2 38563

If there are five steps in a JCL i have to execute the 3rd step, bypass the 4th step and execute the 5th step how do i do this?

Cognizant, Convergys, IBM, TCS, Wipro,

13 73124

What is the use of DUMMY statement in the JCL? What is the use of DUMMY Utility in the JCL?

Convergys,

12 70119

what is the difference between the JCLLIB and JOBLIB ,and where do we use it ?

Convergys,

3 20010

Given a input file with duplicates how to remove the duplicate records from the file using JCL?

CDS, Convergys, TCS,

6 31921

What is the difference between START and XCTL? How do you determine when to use either option?

2 16878

how can we establish a link between two maps using a cobol application program....lets say how can u use 'back' in a map ..to come back on previous .

Attra Infotech,

5 16123

In the RECON, what always sets the IC NEEDED flag on for a registered DB?

3 7393

What is the difference between HDAM & HIDAM DB types and when would you use each?

1 13665

What are the valid recovery points?

1 5075

When do you do Build DBD, PSB for making changes in ACBLIB?

1 7970

Which DB access method (OSAM or VSAM) is used for primary index or secondary index and why?

1 6351

Un-Answered Questions { IBM MainFrame }

What is the mainframe computer?

941

What do you mean by cursor?

988

is there any other way to install s/w in mainframe apart from smp/e system?

2626

Explain host variables?

987

What is basic difference between directory and pds in ibm mainframe?

1174

Are there any set of rules for the names of the steps used in a job? What are they?

1067

How do you define a variable of comp-1 and comp-2?

1199

Explain how are you going to remove duplicates from the file that is being read?

999

What is auto status?

1634

Explain how do you establish a starting position in a browse operation?

1060

how many buffers are allocated to vsam ksds and esds?

1163

Can you define path?

985

What is the difference between hdam and hidam databases?

1124

What is mainframe database?

899

What is difference between isnull and coalesce?

1052

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