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

Suppose I have a file with three fields with data in the following format 1. empid - S9(4) COMP 2. empname - X(20) 3. empsal - S9(5)V(2) COMP-3 If I view this file, it will not be in a readable format. How to display the empid and empsal fields in a readable format without using COBOL program? What kind of SORT card will have to be coded?

4 9822

To check the locks , we use cmd WRKOBJLCK , but how we confirm whether it's objeck lock / member lock. I confused with the Lock type and Status values...Can any body please tell me ...

5 23736

I want my simple Green screen should refersh every 1 min ,How can I do it..? Please share the logic

2 7269

Is there a way to check for an empty file in JCL other than using IEBCOMPR and the command PRINT COUNT(1)?

8 27944

I have to change a program. This program is calling a subroutine mor than 100times within it. so will it have any performance issue? if yes than what changes i can make. Thanx for ur valuable answer.

2 6506

When a object will be locked & when a record will be locked? Plz explain.

2 8210

Can comments be specified at the very beginning of a jobcard? Will the JCL execute?

3 7931

How to display the index.(displacement from an array)

IBM,

4 17185

How to define the a field which accepts value till 99999.99 in db2

3 8757

Some times While checking MSGW for object / member / record locks ,I have seen it's locked by itself ...? How it happen and what action we need to perform if job is updating / writing a record....?

HSBC,

6 15378

Q1.How to read the Array? Q2.How to copy the content of one Array to another Array?

IBM,

4 13053

Q1.How we can copy the data of file one session to another session? Q2.how we can execute a loop infinitely in AS/400 coding? Q3.In ALDON tool,multitask is posible on a perticular object by the user?

CSC,

6 13462

1) What is ONCODE (Return code) in PL/1? 2) How to handle the ONCODE in PL/1? Please give me some examples?

IBM,

1 7899

How many steps we can overide in the proc's?

CS,

2 7232

How to retain the Duplicates in the one records?

CS,

3 10204

Un-Answered Questions { MainFrame }

State all the file open modes?

1081

What is bufferpool in db2?

1059

What is the difference between bind and rebind in db2?

1459

Have you used comp and comp-3 in your project? And how?

2488

How can we read file using curser? how to define a curser?

1313

Define declaration generator (dclgen).

1123

Explain how you can characterize tables in cobol?

1063

What happens in bind step in a db2 program?

978

how to retrieve the instream data in sysin?

1147

how to run other job when one job is active?

1020

Define predicate?

1140

What is the function of the dd avgrec keyword in sms datasets?

1345

Which command is used to remove all rows from a table?

1119

What is lock escalation in db2?

1039

Can we change the password using ALTER? anyone tried and changed?

2021

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