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Introduction to Database System

Introduction to Database System
A relation is in this form if it is in BCNF and has no multivalued dependencies:

domain/key normal form.
third normal form.
fourth normal form.
second normal form.

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Introduction to Database System
The only reason for the existence of relations is to store instances of functional dependencies.

True
False

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Introduction to Database System
Which command is used to remove an index from the database in SQL?

ROLL BACK INDEX
REMOVE INDEX
DELETE INDEX
DROP INDEX

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Introduction to Database System
In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?

One-to-One Relationship
Composite Relationship
One-to-Many Relationship
Many-to-Many Relationship

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Introduction to Database System
Which of the following is not considered to be a basic element of an enterprise-class database system?

Database applications
DBMS
COBOL programs
Users

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Introduction to Database System
In a _____ a parent record type can be linked to one or more "child" record types, but a child record type can have only one parent.

Hierarchical database
Network database
Relational database
Distributed database

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