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

What is the meaning of VSAM RETURN-CODE 28?

3 21739

On which datasets You can have ALT INDEX?

2 6152

How many Alternate Indexes you can have on a dataset?

AB Inc,

2 9930

Is it slower if you access a record through ALT INDEX as compared to Primary INDEX? Why?

1 5971

Yes. Because the alternate key would first locate the primary key, which in turn locates the actual record. Needs twice the number of I/Os.

2424

What is RECOVERY and SPEED parameters in DEFINE CLUSTER command?

1 14334

Describe SHAREOPTIONS parameter (SHR) in Define Cluster command.?

1 17741

What does the KEYRANGES parameter in Define Cluster commend do?

1 7462

What are the optional parameters to the input dataset While loading the empty cluster with the data records?

IBM,

1 6189

What is IDCAMS? and what is the purpose of it?

4 19000

How to delete a member using JCL.?

5 15429

What is the Difference between LDS & ESDS ?

3 15338

Is a delete operation possible in an ESDS?B. Is rewrite operation possible in ESDS ?

3 10379

What is an alternate index and path ?

Infosys, TCS,

2 26759

How many buffers are allotted to VSAM KSDS and ESDS?

1 8245

Un-Answered Questions { IBM MainFrame }

why ci and ca splits are not possible in esds and rrds?

1161

How do you select a row using indexes in db2?

1137

What is the difference between PIC 9.99 and PIC9v99?

1339

what do you mean by define model parameter?

1151

What is check constraint in db2?

1091

What are the different data types in cobol?

1447

What is the meaning of the eibaid field?

928

What is the physical storage length of timestamp data type?

1095

What does a ROLLBACK do?

1523

explain sorting techniques in cobol program?

1206

Mention the option used in a cics command to retrieve the response code after execution of the command?

1106

Can you define cics task?

1110

explain in brief what are the 3 types of vsam files?

1109

What is mainframe application testing?

1057

can anybody post me about file-aid and changemen tools pls and give me reference if any mainframe guys are there

2473

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