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 21871

On which datasets You can have ALT INDEX?

2 6290

How many Alternate Indexes you can have on a dataset?

AB Inc,

2 10046

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

1 6044

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.

2500

What is RECOVERY and SPEED parameters in DEFINE CLUSTER command?

1 14443

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

1 17836

What does the KEYRANGES parameter in Define Cluster commend do?

1 7553

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

IBM,

1 6309

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

4 19205

How to delete a member using JCL.?

5 15612

What is the Difference between LDS & ESDS ?

3 15481

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

3 10540

What is an alternate index and path ?

Infosys, TCS,

2 26880

How many buffers are allotted to VSAM KSDS and ESDS?

1 8328

Un-Answered Questions { IBM MainFrame }

why is there no os/2 (ecs) port of oorexx?

1055

Using alternate indexes in batch program?

1177

What is the pcp in the cics?

984

How to handle exceptional conditions in cics?

1191

What is jcl in mainframe, and how many types of jcl statements are there for a job?

1255

What is DEQ?

1114

What is reorg and runstats in db2?

1263

how many buffers are allocated to vsam ksds and esds?

1213

can we describe the results of opening for input empty vsam files in a cobol program?

1061

How may sets be ordered?

943

How to check sequence on a table in db2?

1120

When the job statement is used?

1032

How can a jobs execution priority be modified?

1347

What is mainframe computer /system?

1079

What db2 400?

1260

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