1. What is an External Schema?

Group of answer choicesThe object-oriented mapping of a (relational) database in an external client program.

A database schema that only contains data about some entities that are external to your organisations - such as the customers or the suppliers.

A number of view definitions that provides an user a restricted view of a given logical schema.

A schema that was created by an external IT developer.

2.

Select three main components of a database management system (DBMS).

Group of answer choices

Query Optimizer

System Catalog Files

Buffer Manager

Replication Coordinator

HTML user interface

Transaction Manager

SQL Clients

C link library

3.

What are the three Levels of Abstraction of a database schema?

Group of answer choices

External Views, Conceptual Schema, Hardware Schema

Conceptual Schema, Physical Schema, Hardware Level

External Views, Physical Schema, Hardware Level

External Views, Logical Schema, Physical Schema