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 to read the 2nd last record of a VSAM file? (The file size is huge and we don't know the key)

HCL,

3263

In the house keeping section of an MVS assembly language program, like the one below STM R14,R12,12(R13) BASR R12,R0 USING *,R12,R11 LA R11,2048 LA R11,2048(R11,R12) .... .... 1. What if BASR R12,R0 IS NOT PRECEDE USING *,R12,R11? 2. USING (base address), REGISTER does USING directive says assembler to treat particular Register as a base register with the mentioned base address..in the above case * i.e current location counter..well if that is the case why we need BASR R12,R0 ? 3. What if I write like STM R14,R12,12(R13) BASR R12,R0 LA R11,2048 LA R11,2048(R11,R12) USING *,R12,R11 there is no address resolution being calculated in both LA statements so is it a right way to set Base register?..will there be any issues with Domain regarding R11 and R12?

1980

What does LA R3,R3 ?

Amdocs,

1 3237

What is SQL Code -904 and -903 in DB2 And how to handle it?

IBM,

1 7295

Why we should use cursor ?

3 4245

I know my query will return more than one row but I don't want cursor what should I do?

1 3441

How can you get the number of rows impacted by the last executed query?

1 2810

While unloading huge amount of data from table. Suddenly job failed some error. Imagine 1M data unloading, In that 90% data unloaded only 10% left, So if want to unload the rest 10% what needs to be done? Whether do i need to start from top or anything ?

JPMorgan Chase,

2331

How to fetch the uncommited data from table ?

JPMorgan Chase,

1 3659

Difference between Find and Read operation in ADABAS file.

Cognizant,

1 5497

I am having n number of records in a table which consists of emp-name is one of the field among them. Now i want to change the first letter of every name with capital.

Cap Gemini,

1 2531

assume ther are 5000 records in a database and want to fetch using cursor. cursor fetches only 3000 records and fetch is not happening for remaining 2000 records. why it happens and how to rectify it

TCS,

1 3201

in db2, already 10 columns arie der, and i want to insert 11th column. what parameters u wil consider for insertion and how will u insert

TCS,

1 3195

I have 60 steps in the JCL and want to Execute Only First from PROC by overriding in JCL ?

1838

How to override loadlib?

Fiserv,

2040

Un-Answered Questions { IBM MainFrame }

What is condition checking in jcl? Is this possible?

1116

how do you round the addition or subtraction of two numbers in assembler? what does the following code do? change process tool(code changes from dev to prd) the changes made to your code should be effected in live. How the process takes place. That is how can you move the code changes from development to production?

1123

What is a plan and package in db2?

1104

Explain the use of DCT ?

1080

difference between tsq and tdq?

1215

What is CICS ?

991

Explain how would you resolve an asra abend?

992

Particular area has been affected in cics screen, what is the process to find?

9891

What is a collection in db2?

1036

What is the pcp in the cics?

939

What is meant by an AICA ABEND?

1183

which cics service transaction is used to gain accessibility to cics control tables? Mention the one that has the highest priority.?

1184

How to execute a query in qmf at a particular time?

945

what is the syntax of ams modal commands?

1264

What is the compute verb? How is it used?

1149

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