To answer this question, you need to understand the concept of schema objects in a database.
A schema object is a logical database structure that is created and owned by a specific user or schema in a database. These objects are used to store, manage, and manipulate data within the database.
Let's go through each option to understand why it is correct or incorrect:
Option A) Indexes - This option is a schema object. Indexes are database objects that improve the speed of data retrieval operations on database tables.
Option B) Tables - This option is a schema object. Tables are used to store data in a structured manner and are one of the fundamental objects in a database.
Option C) Public Synonyms - This option is not a schema object. Public synonyms are used to provide a consistent and simplified naming convention for database objects across multiple schemas. However, they are not considered as schema objects themselves.
Option D) Triggers and Packages - This option is a schema object. Triggers and packages are database objects used to automate actions and encapsulate related procedures, functions, and variables.
The correct answer is C) Public Synonyms. This option is not a schema object because public synonyms are not considered as schema objects in a database.