Which of the following is the main difference between a function and a procedure in PL/SQL?

Update logs must have both old value and new value in the case of -----------

In PL/SQL, a cursor is a pointer to which of the following area?

Which of the following operator is used to match a single character or group of characters (string) to a given string?

Which of the following symbol is used to denote a single line comment in PL/SQL?

A correct execution of the transaction must take the database from one stable state to another. Which of the desirable property of a transaction does this statement refer to?

----------- is used for collision resolution in non-linear search scenario.

--------- is the middle level schema present in three schema architecture.