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

define clustering index.

1024

List out the three types of page locks that can be held.

1147

Explain about rct.

1085

Explain correlated sub-queries.

1025

Mention the location where the output received from explain statement is stored.

1127

What are the uses of db2 optimizer?

1294

Comment whether dclgen is mandatorily used. If not, then what is the point of using it?

1055

Before you give the explain statement, what are the prerogatives?

1028

What is the information associated with sysibm.syslinks table?

1120

Mention the way of highlighting as well as putting a cursor to use in a cobol program.

1075

What is the purpose of using commit?

1096

If the cursor is kept open followed the issuing of commit, what is the procedure to leave the cursor that way?

1146

What is meant by explain?

1126

Define db2.

1108

Highlight all the advantages that are attached to a package.

1113

Un-Answered Questions { IBM MainFrame }

What is difference between rollback and commit?

1157

Explain the difference between using the read command with into option and set option?

1022

I have 60 steps in the JCL and want to Execute Only First from PROC by overriding in JCL ?

1836

What is the difference between hidam and hdam databases?

959

What does the 'cemt:cics' transactions do?

1200

What is the difference between using bind () and rebind () methods of naming class?

1394

what do you mean by gdg in vsam?

1192

When output dataset space is required, what quantity categories are used?

1357

how would find total records in files using sequential?

982

What are the advantages and disadvantages of a hierarchical database?

1140

I have a COBOL program that ACCEPTs some input data. How do you code the JCL statement for this?

1190

What are the contents of dclgen?

1107

Explain how can a jobs execution priority be modified?

1200

I have a subprogram B calling from mainprogram A.I have opened a cursor in A ,Can i fetch the same cursor in subprogram B , If yes , Please explain the reason?

2386

have 3 tables table1, table2 and table3 which contains employee information. table1 is master table, table2 contains emp details like emp no and so on, table 3 contains emp salary. so if any emp leave company between 25th - 30th of every month it has to get updated in tables. but it is not getting updated. What is the reason.

1733

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