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

IBM MainFrame (5234)
IBM AS400 (1355)
IBM PL/1 (31)

MainFrame Interview Questions

Questions Answers Views Company eMail

What is the difference between base table and view?

7 32856

I have a KSDS File.I hav a Records like 1,2,3,4,5,6,...100. I want to read using Dynamic mode like from 10 th Record onwards like, 10,12,14,16,18,....60. Waht is the command for this.

CTS,

2 8532

what is the difference between adding keys & constraints into a phisical file

HSBC,

4 11757

what is the difference between adding keys & constraints into a phisical file

HSBC,

6 15607

How we can't update join logical files?

10 25545

what is the purpose of DMPCLPGM IN CL?

IBM, Wipro,

3 19640

How can i write a comp-3 variable into a sequential file should i declara the field in the file description as comp- 3?

1 11225

I want to change the attribute of field or want to add new field in existing PF but condition is format level identifier should not change, is it possible?

Mind Tree, TCS,

9 25338

what is QSAM?use of the QSAM?how it is used?

1 7056

Alt key is used for what type of vsam file

3 7578

How many cluster index can have in a table?

HSBC,

3 7498

what is level 66 means??

7 27906

What is UNION,UNION ALL?

2 13389

What are the different types of VSAM files available?

CSC,

3 12683

What is Control Interval, Control Area ?

L&T,

1 7310

Un-Answered Questions { MainFrame }

Explain about rct in db2?

1118

What is the meaning concurrency in the db2 database?

1119

Explain db2.

1045

What is parallel sysplex?

824

Why is free space left in ksds dataset?

1150

How errors are handled in CICS programs?

1137

What are the parameters that are used in creating a gdg?

1229

Can you define path?

996

Mention the downsides of page level lock.

1170

What are the mainframe computing pros and cons?

1124

Is their any limit for data sets?

1196

Differentiate cobol and cobol-ii. (Most of our programs are written in cobolii, so, it is good to know, how, this is different from cobol)?

1125

What are the steps involved in access method services?

970

Difference Between Interactive & Batch Job?

1244

how can you check for a records existence without causing and i/o (chain/read)?

2106

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