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 13715

What is a JCL Command statement ?

IBM,

1 7318

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 17468

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

IBM,

1 9207

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 27441

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

IBM,

4 23827

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 17076

Can we have a JOBSTEP without any EXEC ?

IBM,

6 20078

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 11613

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

IBM,

4 11850

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 6682

what is the Difference between SYSIN and PARM ?

IBM,

5 18680

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

IBM,

1 4909

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 6500

Un-Answered Questions { IBM MainFrame }

Can you define cics task?

1197

What does a disposition of (new,catlg,keep) for a dsn mean?

1208

Explain the function of dd disp parameter?

1186

What does a ROLLBACK do?

1597

Explain ims software environment?

1049

explain in brief how are different versions of gdg named?

1057

How many databases can be created inside an instance in db2 ?

1091

How do I delete a table in db2?

1131

How to remove 2 duplicate records and copy only one using job control language?

1270

what is uni-rexx?

1047

why is there no os/2 (ecs) port of oorexx?

1063

What are steplib and joblib? What for they are used?

1314

What is use of restart and how to use it?

1373

How to use the same COBOL program in Batch and CICS on lines? explain with an example

2443

What is interval control?

1211

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