Answer 17

Correct answers: a, c, e

Explanation:

PL/SQL table methods are built-in subprograms (procedures or functions) that operate on tables and are called using dot notation (.).

• EXISTS(n): Returns TRUE if the nth element in a PL/SQL table exists.
• TRIM : Removes one element from the end of a PL/SQL table.
• COUNT : Returns the number of elements that a PL/SQL table currently contains.

Choices B and F are incorrect because SUBSTR and UPPER are single-row character functions.

Choice D is incorrect because FLOOR is a single-row number function.