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 27159

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

HCL, IBM, Wipro,

7 34349

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

Convergys,

9 49273

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

Convergys,

2 38579

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 73220

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

Convergys,

12 70213

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

Convergys,

3 20031

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

CDS, Convergys, TCS,

6 31945

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

2 16899

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 16142

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

3 7400

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

1 13680

What are the valid recovery points?

1 5082

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

1 7973

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

1 6362

Un-Answered Questions { IBM MainFrame }

What is netezza database?

1028

Mention one alternative aspect of CICS?

1073

How ENQ and DEQ used in CICS?

1443

What is cobol?

1238

Give some examples of command terminators?

1261

What is maximum displacement?

1182

What are different data types in cobol?

1322

what are the idcams commands that can be used for vsam and explain each of them.

990

How can you access esds files from cics?

1108

What is the advantage of creating the acbs well ahead of time?

1037

What are the advantages and disadvantages of a hierarchical database?

1144

How to do automated restart when a job abend?

1388

How many register we are using in mvs?

1054

what is difference between file-aid tool and file-aid utility?

1504

What does the following code do? Ap wkur,=p5 where wkur is a label?

1089

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