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

Can anyone tell me how to handle the array beyond the limit. If we have an array or a table which can handle 5000 records but now we have to compensate 20000 records with the same array? how to handle the situation.

2 9664

Which is more efficient - the external subroutine or a copycode coded in to a NATURAL program? And Why?

Hexaware,

2 14190

We have two PS files,want to compare those files and put the duplicate records in one file. Input file 1 contains(1,2,4,9,10) Input file 2 contains (1,4,5,11,12,14,16). Help me with jcl.

6 17011

I have two questions here. 1. How to read a flat file in reverse order? 2. How to read a VSAM KSDS file in reverse order? In both the cases we donot know the total number of records.

L&T,

2 17432

What is catelog procedure and how many catelog procedure to use in one job?

Infosys,

2 8700

How to check empty file in jcl?

Infosys,

4 27146

How to pass values in jcl to cobol?

IBM, Infosys,

4 25710

Request to database but database is not available so what is was abend is raised?

UST,

2 7637

Why do we need to create an alias if we can directly use the table name? What are the benefits of referring a table name by its alias? Also, when should we go for alias and when for synonyms?

1 4133

what is the responsibility of the construction superintendent

Almco,

2151

how to convert the recors form vsam file to db2 table tru file aid

TCS,

3270

I have two input files i/p1 name id-key flag date i/p 2 name id-key date if id-key matches in the both the files then it should write the output file from i/p1 with flag 'Y'. It should be done thru JCL sort card ,Please provide the info on this. ---Note : output file should have all records from i/p1 with proper Flag.

2 5925

I have 5 steps in my jcl ,I need to execute first three steps and then 2nd step again ,4th and 5th steps if rc of 2nd step is zero

ABC,

1 4020

What is the difference between Re-Entrant and Quasi re entrant program?? By looking at the program how can you tell if its re- entrant or not??

IBM,

1 10491

Does Natural online require CICS or other TP systems to function? How does Natural interact with CICS? Thanks.

1 4916

Un-Answered Questions { IBM MainFrame }

What is isolation level in db2?

1017

List in order the hierarchical levels of jcl?

1114

Name and explain the three location modes?

1369

Explain the difference between start and xctl?

1081

Explain how to pass instream data in sysin with assembler?

1101

What is eib?

1178

What is explain plan in db2?

1007

what is the compile process of cobol program expalin with code

2595

What is amode(24)?

1251

What does db2 mean?

1024

how do you reference the variable block file formats from cobol programs

1266

Can you explain primary aspect of cics?

1162

Hello Guys, I have 1+ Year Experience in MAINFRAME TESTING. After 1 Week I have an Interview With a Company on Mainframe Testing. Please Could You Guys Please Suggest me What Sections Should I prepare ?? ___Tell Me the Topic Or Appropriate Site & Links. ?? ---------------Thank You

2793

Suppose I have a program in cobol name ”careerride” and want to execute the program by jcl. Specify the process?

1124

Discuss record management in vsam?

979

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