INTERVIEW QUESTIONS MAINFRAME COBOL DETAILS

Question: Why can't occurs clause be used at 01 level ?

Answer: Occurs Clause can be used only for group item and not for elementary item.

Occurs Clause can be used only for group item and not for elementary item. Source: CoolInterview.com

Occurs clause is used to repeat data-items but not Records Source: CoolInterview.com

occurs clause is used for declaring group of fields ocuuring multiple times while 01 level is used to dealre record Source: CoolInterview.com

occurs clause is used for elementary and group fields. Source: CoolInterview.com

Occurs clause is using only repeat of the fields in the record.

Ex: 01 group-rec. ---->record
05 ws-details occurs 5 times.
10 ws-accno pic x(10).
10 ws-accname pic x(15). Source: CoolInterview.com

we cannot use 01 level for occurs because 01 level is used for Record strcture so we cannot repeat the record stucture more than once but we can use 05 or 10 levels to repeat the specific field more than once in the record structure. Source: CoolInterview.com

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