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 9953

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 23959

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

2 7394

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

8 28265

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 6595

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

2 8324

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

3 8072

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

IBM,

4 17347

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

3 8892

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 15613

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

IBM,

4 13205

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 13657

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 7976

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

CS,

2 7335

How to retain the Duplicates in the one records?

CS,

3 10330

Un-Answered Questions { MainFrame }

Explain the data storage?

1065

can any one exaplin about Decision Tables in test region with good example

2856

What is house keeping in assembler?

1078

What is the advantages of using IDMS compared to other database systems?

1463

What is dbd?

1071

Define the necessity of run stats among the environment test?

1051

What is bmp mode?

3604

Explain the contents that are a part of dclgen.

1144

what is the meaning of each of the values in shareopts(2 3)?

1076

what is the disadvantage of using global variable?

1260

Can you explain common systems area?

1160

What is db2 stogroup?

1225

can oorexx run normal rexx programs?

1063

How to establish dynamic cursor position on a map?

1118

What are the mainframe computing pros and cons?

1180

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