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

How are write I/Os from the buffer pool executed?

1 4149

What is the syntax of SELECT statement when embedded in a COBOL program?

2 10090

What is ACQUIRE/RELEASE in BIND?

Cognizant,

3 26847

Can All Users Have The Privilege To Use The SQL Statement Select (DML)?

1 4053

What are foreign keys?

1 4851

What is JOIN and different types of JOIN.

IBM,

2 12574

What does DSNDB07 database do?

2 12221

What is a DB2 access path?

1 7173

What is a recovery log?

1 4807

What is the COBOL picture clause of the following DB2 data types: DATE, TIME, TIMESTAMP?

3 20400

How does DB2 store NULL physically?

2 10943

Explain the use of the WHERE clause?

1 4104

How can you quickly find out the number of rows updated after an update statement?

CSI, CTS,

1 9538

How could one combine a set of incremental image copies into a single copy?

1 4420

When one binds a PACKAGE ( of a plan ) what package information is stored and where it is stored?

3 8432

Un-Answered Questions { IBM MainFrame }

What is comp-1?

960

to use the rewrite command, how should the vsam file be opened?

1311

What is database reorganization?

1128

Tell me what type of files we can process thru file-aid?

945

What is redefines clause in COBOL?

1295

What Are Send Map Maponly & Send Map Dataonly ?

1215

At what point are extension eliminators mandatory?

1003

Why is it required to have a keyed directed retrieval?

1025

how you can access an uncataloged dataset in a JCL?

1141

What is the compute verb? How is it used?

1149

Can we give +2 instead of +1 while creating a new gdg file?

967

What does reorg do in db2?

1029

what u mean by csrloc and rtncsrloc in rpgIV in as/400.Give an eg? to do...give some coding...what is row no and column no ???..if possible...give a no of lines coding....please

4450

What is the advantage in De-normalizing tables in DB2?

1181

when can a job time-out occur? How to overcome that?

1293

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