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In Oracle, which of the following package procedure is UNRESTRICTED ?

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In Oracle, which of the following package procedure is UNRESTRICTED ?

(a) CALL_INPUT

(b) CLEAR_BLOCK

(c) EXECUTE_QUERY

(d) USER_EXIT

This question was addressed to me during an interview.

Question is taken from Programmatic Oracle Structures in chapter Oracle Database 11g Architecture Options of Oracle

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The correct choice is (d) USER_EXIT

To explain I would say: A user exit is a C subroutine and called by Oracle Forms to do special-purpose processing.It can display messages on the Oracle Forms status line, get and set field values, do high-speed computations and table look-ups, and manipulate Oracle data.

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