Question 1

Which statement is used to define a named group of related tables, views, domains and other database objects?

Options :

A : CREATE

B : CREATE TABLE

C : CREATE DOMAIN

D : CREATE SCHEMA

Answer: D

Question 2

Which of the following best describes a composite key?

Options :

A : A composite key is a primary key that consists of the first two attributes of a relation

B : A composite key is a primary or foreign key defined by its parent keys.

C : A composite key is a foreign key that consists of the same attributes as the primary key from a related table.

D : A composite key is a primary or foreign key that consists of two or more attributes of a relation

Answer: D

Question 3

What improvement can be made to file-based databases to overcome their limitations?

Options :

A : Implement a tabular structure.

B : Gather files in a distributed repository

C : Use a hierarchical database file system.

D : Tightly couple database structure to database application programs.

Answer: A

Question 4

Consider the following relational algebraic expression as well as the Employee and Department relations shown in the exhibit: Which of the following relations would result from the given relational algebraic expression?

Options :

A :

B :

C :

D :

Answer: D

Question 5

With regard to databases, what is normalization?

Options :

A : The process of reducing the cardinality of a relation

B : The process of organizing and refining relations

C : The process of duplicating data to reduce the number of tables

D : The process of limiting data stored in a table to a specific range of values

Answer: B