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 DB2 be accessed by TSO users? If yes, which command is used to invoke DB2?

1 5638

max number of columns in a db2 table?

6 25078

Can you access the DB2 Directory table using SQL?

3 7668

What is correlation names?

1 4857

What is an alias?

3 6323

I need to view the number of tables existing under one particular Owner. Is it possible? If so, pl give the SQL query for this?

3 6585

What is the difference between Where and Having Clause

IBM, iFlex,

7 30523

Which transaction use a command thread ?

1 3812

What is a LIKE table and how is it created?

2 5521

Name some fields from SQLCA.

2 6566

what's the equivalent Cobol Data type for Decimal(x,y) in DB2? what does the current SQLID register contain?

Cap Gemini, Tech Mahindra,

3 18368

What are the isolation levels possible ?

3 7065

What is meant by index cardinality?

2 6587

What does the RUNSTATS Utility do?

4 20682

What is the purpose of the QUIESE Utility?

1 5176

Un-Answered Questions { IBM MainFrame }

How would you understand error(execution phase)?

1264

What is meant by explain?

1140

Can I cleanly uninstall oorexx?

974

What is the function of the steplib dd statement?

1214

What are Naming Standards in QMF?

1695

What are the parameter we cannot use in procedure?

1142

What is load replace in db2?

1005

how could you write a program in a structured format?

1002

What is the purpose of idcams?

1058

What is a lds (linear data set)?

1022

can any one exaplin about Decision Tables in test region with good example

2787

how do u conduct impact analysis?

2348

Why adabas is used?

949

Can you explain create an empty file by using sort?

960

Have you used comp and comp-3 in your project? And how?

2488

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