Correct Answer : All of the above
Explanation : PL/SQL text is made up of lexical units, which are groups of characters and can be classified as Delimiters, Identifiers, Literals and Comments.
Correct Answer : IN, INOUT
Explanation : IN and INOUT pass parameters can be reference by procedure.
Correct Answer : IN
Explanation : IN pass parameter cannot be overwritten by procedure.
Explanation :