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  • INTERVIEW QUESTIONS MAINFRAME DETAILS
    Question :
    why do we use S9(4) comp to define the PARM length and not s9(4)comp-3? which is better?

    Posted by: neha on 6/13/2010

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    Category Mainframe Interview Questions
    Rating (0.4) By 1019 users
    Added on 6/13/2010
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    Answers:

    S9(4) COMP uses 4/2= 2 bytes to store the PARAM length whereas S9(4) COMP-3 uses same 4/2= 2 bytes plus 1/2 byte to store the sign bit, therefore a total of 3 bytes. Hence, we use the former.



    Posted by: Parveen Arora    

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    in addition to above answer, as we know the max length of data that can be passed by parm is 100, s9(4)comp is preferable than the other.



    Posted by: kishore    

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