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

What is the difference between external and global variables in COBOL?

Winsol Solutions,

1455

In COBOL programming, what is PERFORM? What is VARYING?

CDC,

1142

What is the maximum length of a field you can define using COMP-3 in COBOL?

UGC Corporation,

1 1986

In COBOL, what is the different between index and subscript?

TryTechnicals Pvt Ltd,

1243

What is inspect in cobol ?

Infosys,

1293

How many sections are there in data division in COBOL?

B-Ways TecnoSoft,

1127

What is the difference between PIC 9.99 and 9v99 in COBOL?

SwanSoft Technologies,

1327

What is the difference between array and a multiple occurrence data structure?

1 2080

What is the purpose of the "N" in the following calculation specification? C KEY CHAIN FILE N 99

1 1730

Which of the following operations does NOT zero the field FLDA defined as 4,0? C MOVE *ZEROS FLDA C Z-ADD *ZEROS FLDA C Z-ADD 0 FLDA C MOVE *ALL'0' FLDA C SUB FLDA FLDA C MOVE '0000' FLDA C CLEAR FLDA C MOVE *BLANKS FLDA

1 1690

What is the purpose of the following? I 'CLOSED' C STAT01 I 'OPEN' C STAT02

1 1626

List the steps/commands necessary to accomplish the following: a. Copy data from the file ORDHDR into file ORDHIST b. The file ORDHIST may or may not exist c. If the file ORDHDR does exist, it may or may not contain data d. The file ORDHIST may or may not contain data, if the file does contain data the old data should be erased

1 1716

What is the purpose of the following? FORDHDR1 IF E K DISK ORDHDRF KRENAMEORDHDRF1

1 1625

What is the purpose of the following C/COPY QRPGSRC, ORDERR

1 1744

What is the purpose of the following FORDHDR1 CF E WORKSTN $2SFN SFILE FMT2

1 1567

Un-Answered Questions { MainFrame }

In the house keeping section of an MVS assembly language program, like the one below STM R14,R12,12(R13) BASR R12,R0 USING *,R12,R11 LA R11,2048 LA R11,2048(R11,R12) .... .... 1. What if BASR R12,R0 IS NOT PRECEDE USING *,R12,R11? 2. USING (base address), REGISTER does USING directive says assembler to treat particular Register as a base register with the mentioned base address..in the above case * i.e current location counter..well if that is the case why we need BASR R12,R0 ? 3. What if I write like STM R14,R12,12(R13) BASR R12,R0 LA R11,2048 LA R11,2048(R11,R12) USING *,R12,R11 there is no address resolution being calculated in both LA statements so is it a right way to set Base register?..will there be any issues with Domain regarding R11 and R12?

1977

What are the building blocks used in vsam datasets?

980

how can you check if a file is empty using jcl?

1418

Write in brief about clusters?

974

Is it possible to left uncode disp? If yes, how?

1180

Have you used the sort in your project?for this type of questions any working on real time project give the eg. with real time scenario.

2429

How to find the number of rows in db2 tables?

1061

What is file information data structure(infds) in as400?

1475

Where the QTEMP library will get created? if the the answer is QSYS, then howcome more than one job can create same library name(QTEMP) in QSYS? what is the uniqueness of QTEMP? For example, run the below command in different workstation WRKOBJ QSYS/QTEMP And take 8 in the option to check the description. both will have different info. so where(which LIB) exactly the QTEMP is stored?

8604

What information does a psb contain?

1102

I understand Join always perform better than subqueries. Then what is the advantage/use of Subqueries/correlated subqueries etc.,in DB2 programming.Please explain.

2059

A dd statement consists of 4 fields. Name them?

1418

What is a storage group (stogroup)?

1241

What are the sub parameters for undo command?

1085

How to know whether the module is dynamical or statistical?

1134

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