IBM MainFrame Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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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 21752

On which datasets You can have ALT INDEX?

2 6165

How many Alternate Indexes you can have on a dataset?

AB Inc,

2 9944

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

1 5977

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 14343

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

1 17750

What does the KEYRANGES parameter in Define Cluster commend do?

1 7471

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

IBM,

1 6198

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

4 19012

How to delete a member using JCL.?

5 15448

What is the Difference between LDS & ESDS ?

3 15353

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

3 10389

What is an alternate index and path ?

Infosys, TCS,

2 26768

How many buffers are allotted to VSAM KSDS and ESDS?

1 8251

Un-Answered Questions { IBM MainFrame }

What is journal recovery?

1061

What are the cics transactions?

1038

What do you mean by storage group (stogroup)?

1046

What is the maximum length of a single line of jcl?

1358

Explain the function of entry-sequenced data set?

1042

How to remove the spaces at the end of each record in the output file of variable length, via cobol program?

1178

What is commit in db2?

1065

When the like statement is used?

1229

Which dd parameters are required?

1195

When you specify multiple datasets in a JOBLIB or STEPLIB, what factor determines the order?

1471

What makes vrrds different from vsam?

1255

What is the difference between hidam and hdam databases?

969

Why do we bind in db2?

1216

What is currency in idms?

973

Explain what are the optional parameters to the input dataset while loading the empty cluster with the data records?

1164

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