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 27497

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

HCL, IBM, Wipro,

7 34652

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

Convergys,

9 49600

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

Convergys,

2 38710

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 73765

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

Convergys,

12 70712

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

Convergys,

3 20198

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

CDS, Convergys, TCS,

6 32223

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

2 17022

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 16336

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

3 7517

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

1 13773

What are the valid recovery points?

1 5171

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

1 8059

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

1 6432

Un-Answered Questions { IBM MainFrame }

What does a rollback do in idms?

1044

How do I delete a table in db2?

1130

what is meant by dirty read in vsam?

1395

How to print 10 to 1 if the input have only 10 digit number?

1309

Is it possible to create an Instance in DB2 using DB2 Control Center ?

1157

How do you define an altindx?

1089

What is amode(24)?

1300

Differentiate between the joblib and the steplib statements?

1526

What is the use of the program list table?

1133

Which isolation level provides highest data integrity?

1191

Can you explain communication area?

1097

What is coalesce in db2?

1190

Matching Logic in Jcl not in cobol.Could any one please answer this question

4230

Define a path?

1142

How to remove 2 duplicate records and copy only one using job control language?

1264

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