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 COMMAREA(communications area)?

2 11409

Mention the 5 fields available in the symbolic map for every ?NAMED? field in the DFHMDI macro? Give a brief description of these fields (Not exceeding a line).

IBM,

2 13615

What is the function of the LOAD command?

IBM,

1 5242

What are the differences between an EXEC CICS XCTL and an EXEC CICS LINK command.

1 9499

What is the difference between START and XCTL ?

IBM,

3 8012

What is the meaning of BMS length of field = 0?

IBM,

1 8972

How and where is the TWA size set? .

IBM,

1 12075

What is the difference between LINK and XCTL ?

IBM,

1 7646

What is the EIB parameter and the CICS command used to implement Pseudo-Conversational technique using single PCT ? Single PPT entry?

IBM,

1 7418

Name some common CICS service programs and explain their usage?

IBM,

1 6102

What is the difference between EXEC CICS HANDLE CONDTION and an EXEC CICS IGNORE command?

IBM, TCS,

2 8980

Explain floating maps with illustration.

IBM,

1 4660

What is the difference between a RETURN with TRANSID and XCTL ?For example prog. A is issuing REUTRN with TRANSID to prog B. Prog A. is issuing XCTL to prog B?

3 29140

What is an AEY9 abend ?

IBM, Xansa,

4 25132

How do you fire a batch job from a CICS transaction ?

TCS,

2 10623

Un-Answered Questions { MainFrame }

what does the opcode free do?

1945

what are different types of substems?

2247

what are the additional information you should give in the dd statement while defining the next generation of a gdg?

981

What are fillers? What is the actual use of fillers? With mall/simple example?

999

Explain the input procedure?

941

What rules are followed by the search verb.

1106

What is use of restart and how to use it?

1310

What are the two types of logging in the db2 database? Explain them.

1071

I have created a command that display Source file and library. Now i want that when i enter library name and press f4 on Source file, pgm should display all the PF- SRC's in that Library. For F4 option i have used Choice program but since only limited paramters are passed in Choice pgm i am not able to paas library name and further can't call a pgm that will display list of Source files. Below is the Code snippet for CMD type object :- CMD PROMPT('Source Scan for HUB Standard') PARM KWD(SOURCE) TYPE(*CHAR) LEN(1) RSTD(*YES) + VALUES(N A) MIN(1) + CHOICE('N,A') PARM KWD(SRCFILE) TYPE(FILE) RSTD(*NO) + PROMPT('SOURCE FILE') FILE: QUAL TYPE(*NAME) LEN(10) RSTD(*NO) EXPR (*YES) + CHOICE(*PGM) + CHOICEPGM (XXXXXLIB/YYYPGM) QUAL TYPE(*NAME) LEN(10) DFT(*LIBL) + SPCVAL((*LIBL)) EXPR(*YES) PROMPT ('Library') Below is the Choice pgm:- PGM PARM(&PARM1 &PARM2) DCL VAR(&PARM1) TYPE(*CHAR) LEN (21) DCL VAR(&PARM2) TYPE(*CHAR) LEN (2000) IF COND(%SST(&PARM1 1 10) = 'CHOICE ' *AND + %SST(&PARM1 11 10) = 'SRCFILE ' *AND + (%SST(&PARM1 21 1) = 'C' *OR %SST (&PARM1 + 21 1) = 'P')) THEN (DO) /* (%SST(&PARM1 21 1) = 'C' *OR %SST (&PARM1 + */ CHGVAR VAR(&PARM2) VALUE('Name, F4 for List') ENDDO IF COND(%SST(&PARM1 1 10) = 'CHOICE ' *AND + %SST(&PARM1 11 10) = 'SRCFILE ' *AND + %SST(&PARM1 21 1) = 'P') THEN (DO) CHGVAR VAR(&PARM2) VALUE('Name, F4 for List') CALL PGM(GTSQL) PARM ('XXXXLIB') return ENDDO Thanks in Advance for looking into.

3488

How is the value function used?

1151

On which dataset you can have alt index?

913

What is mainframe computer /system?

1019

we cant write data into file using cl program then what is sndf

1652

What the difference is between continue and next sentence?

1155

Explain how can a jobs execution priority be modified?

1198

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