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

Is there GOTO and SWITCH-CASE available in JCL ? Is IF-THEN-ELSE available in JCL also just like it is available for VSAM datasets under Model Commands category ?

IBM,

1 13710

What is a JCL Command statement ?

IBM,

1 7297

How many JOB statements a JCL can have ? If there are more than one JOB statements in a JCL, are they submitted in succession or in parallel ?

IBM, Tech Mahindra,

4 17444

If Name is NOT given for a JOB statement, then will it give error or installation will supply it for the JOB ?

IBM,

1 9202

How to release a JOB (from the input queue) held by TYPRUN = HOLD ? and how to see the installation default time after which a JOB will be automatically released ? How to see the list of currently HELD JOBS ?

IBM,

5 27414

How to print the Output to SPOOL using MSGCLASS and SYSOUT ?

IBM,

4 23810

Is Default for MSGCLASS = (1,1) ?

IBM,

2 6900

1) Is CLASS used for assigning Priority (as we say a job having class '6' will run before the job having class '5'? then what is the difference between CLASS and PRTY ? 2) In a same JCL, 2 JOB statements with different Classes and NO PRTY are submitted ? which will run first ? & with different classes and different PRTY also, which will run first now ?

IBM,

3 17062

Can we have a JOBSTEP without any EXEC ?

IBM,

6 20057

Is stepname is a MUST and should be unique also for each JOBSTEP ? or system can supply the stepname for a step which is not given a name by the programmer ?

IBM,

6 11588

Why 16 is used in calculating the DPRTY ? as, DPRTY = (num1, num2), THEN, DPRTY = 16* num1 + num2

IBM,

4 11832

As PARM can supply information to a program ? Can PARM be used to supply information to a cataloged or Inline Procedure also ?

IBM, RS Software,

2 6670

what is the Difference between SYSIN and PARM ?

IBM,

5 18660

What is default if we don't specify RD parameter at all ?

IBM,

1 4894

What is Automatic Restart ? EXEC PGM = PROG1, RD = R (Is it the Restart of a JOBSTEP or Restarting the execution of the program?) Do we Restart it or it automatically Restarts executing again and again ? Then when it will finish executing ? or After Abending, when we submit it again, then it is Restarted from the Last successful Checkpoint ? If some JOBSTEP is abending, what is the benifit to Restart it, WILL IT NOT ABEND AGAIN if you don't change the LOGIC ?

IBM,

1 6489

Un-Answered Questions { IBM MainFrame }

There are 5 fields and 1000 records in a file. Unload it into an array. Write the syntax for declaration and how will you unload it.

1502

Explain the difference between a package and a plan. How does one bind 2 versions of a cics transaction with the same module name in two different cics regions that share the same db2 subsystem?

1101

Is it possible to obtain a record from IDMS database without mentioning the record-name itself?

1398

What is the clustering index in the db2 database?

1050

Write some characteristics of cobol as means of business language.

1203

What is maximum displacement?

1267

How do you round the addition or subtraction of two numbers in assembler?

1091

What is the difference between record occurrence and record type in idms?

954

How is the record format of an output dataset specified?

1209

What will happen if we drop the base register in the program which contains only one basereg?

1026

Differentiate between addressing mode and run mode.

1140

What is the problem of ordered sequential files access?

1214

How can you submit a job through cobol program?

1593

How to view db2 table structure?

1069

What is icm instruction?

1123

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