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Equivalence of DFHCOMMAREA in CICS ?

 
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Soumyaranjan

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Joined: 16 Jul 2008
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Location: USA

PostPosted: Sun Nov 16, 2008 12:28 am    Post subject: Equivalence of DFHCOMMAREA in CICS ?
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Hi all,
Can anyone answer this question with proper explanation...?

(Q) which one of the following is equivalent to DFHCOMMAREA in CICS ?
(a) VSAM
(b) TSQ
(c) Intra partition TDQ
(d) Extra partition TDQ


Regards ;
Soumya
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Robert Sample

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PostPosted: Sun Nov 16, 2008 4:02 am    Post subject:
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TSQ is a memory area used to hold data needed between transactions, similar to DFHCOMMAREA. VSAM and extra partition TDQ both refer to types of files. Intra partition TDQ are destructive read so aren't quite the same as DFHCOMMAREA. They are also stored in a file managed by CICS.
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Soumyaranjan

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PostPosted: Sun Nov 16, 2008 3:44 pm    Post subject: Reply to: Equivalence of DFHCOMMAREA in CICS ?
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But TSQ's can be read and modified by any transaction within the same cics region,where as DFHCOMMAREA can be modified only by the trasactions using it.
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Robert Sample

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PostPosted: Sun Nov 16, 2008 7:55 pm    Post subject:
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Nothing is exactly the same as DFHCOMMAREA, but TSQ's are closer than any of the other three. All four can be used by any transaction so using that as a filter criteria doesn't provide any additional information that would help.

You asked, I gave an answer -- if you don't like it, then pick your own -- but you have the reasons I selected the one I did.
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dick scherrer

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Joined: 23 Nov 2006
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PostPosted: Mon Nov 17, 2008 12:38 am    Post subject:
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Hello,

Quote:
which one of the following is equivalent to DFHCOMMAREA in CICS ?
IMHO, the answer should be (e) None of the above. Or the question should be better qualified.

Because none of them exactly are (as Robert mentoned).

Keep in mind that you may be asked a question in an interview that has no truly correct answer, so you pick the one that is closest (or the one you think the interviewer wants for an answer).

Quote:
But TSQ's can be read and modified by any transaction within the same cics region,where as DFHCOMMAREA can be modified only by the trasactions using it.
Similar "qualifications" can be said for all of the other answers as well. . .

Not to sound too harsh, but if you don't like the answer given - ok, but your debate/disagreement should be with with the place that asked the question rather than the forum.
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