Database Management Ultimate Quiz!

Approved & Edited by ProProfs Editorial Team

The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.

Learn about Our Editorial Process

| By BOSTON COLLEGE

BOSTON COLLEGE

Community Contributor

Quizzes Created: 1 | Total Attempts: 530

Questions: 49 | Attempts: 530 | Updated: Mar 21, 2023

Questions

Settings

Feedback

During the Quiz End of Quiz

Play as

Quiz Flashcard

Create your own Quiz

Database Management Ultimate Quiz! - Quiz

Do you know what is database management? Database management allows the user to organize, store and retrieve information from a computer. It can also describe the data storage, operations, and security practices of a database administrator. This quiz will require you to know things like how entity subtypes and supertypes are organized in a specialization hierarchy and important inheritance characteristics. This quiz will teach you about database management and what it entails.

Questions and Answers

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Dec 17, 2018

Quiz Created by
BOSTON COLLEGE

Database Management Ultimate Quiz!

Entity supertypes and subtypes are organized in a specialization hierarchy.

Within a specialization hierarchy, a supertype can exist only within the context of a subtype.

The entity supertype contains the common characteristics and the entity subtypes contain the unique characteristics of each entity subtype.

The property of the subtype discriminator enables an entity supertype to inherit the attributes and relationships of the subtype.

One important inheritance characteristic is that all entity subtypes inherit their primary key attribute from their supertype.

At the implementation level, the supertype and its subtype(s) depicted in the specialization hierarchy maintain a 1:1 relationship.

Entity subtypes do not inherit the relationships in which the supertype entity participates.

In specialization hierarchies with multiple levels of supertype/subtypes, a lower-level supertype inherits all of the attributes and relationships from all of its upper-level subtypes.

An entity supertype can have disjoint or overlapping entity subtypes.

Overlapping subtypes are subtypes that contain a unique subset of the supertype entity set.

Disjoint subtypes are subtypes that contain nonunique subsets of the supertype entity set.

Implementing non-overlapping subtypes requires the use of one discriminator attribute for each subtype.

The completeness constraint can be partial or total.

Generalization is based on grouping unique characteristics and relationships of the subtypes.

Specialization is the top-down process of identifying lower-level, more specific entity subtypes from a higher-level entity supertype.

An entity cluster is a "virtual" entity type used to represent multiple entities and relationships in the ERD.

To model time-variant data, you must create a new entity in an M:N relationship with the original entity.

A design trap occurs when a relationship is improperly or incompletely identified and, therefore, is represented in a way that is not consistent with the real world.

Some designs use redundant relationships as a way to simplify the design.

The extended entity relationship model (EERM) is sometimes referred to as the ____.

____ is a generic entity type that is related to one or more entity subtypes.

The ____ depicts the arrangement of higher-level entity supertypes (parent entities) and lower-level entity subtypes (child entities).

The relationships depicted within the ____ are sometimes described in terms of "is-a" relationships.

Every subtype can have ____ supertype(s) to which it is directly related.

A specialization hierarchy can have ____ level(s) of supertype/subtype relationships.

Non-overlapping subtypes are subtypes that contain a(n) ____ subset of the supertype entity set.

In the specialization hierarchy there is a ____ relationship between a subtype and supertype.

One important inheritance characteristic is that all entity subtypes inherit their ____ key attribute from their supertype.

The default comparison condition for the subtype discriminator attribute is the ____ comparison.

A(n) ____ is the attribute in the supertype entity that determines to which entity subtype each supertype occurrence is related.

The property of ____ enables an entity subtype to inherit the attributes and relationships of the supertype.

____ is the bottom-up process of identifying a higher-level, more generic entity supertype from lower-level entity subtypes.

If one exists, a data modeler uses a ____ as the primary key of the entity being modeled.

An entity cluster is formed by combining multiple interrelated entities into ____.

Overlapping subtypes are subtypes that contain ____ subsets of the supertype entity set.

A ____ key is a real-world, generally accepted identifier used to distinguish that is, uniquely identify-real-world objects.

The most important characteristic of an entity is its ____ key, used to uniquely identify each entity instance.

The primary key's main function is to uniquely identify a(n) ____ within a table.

The “____” characteristic of primary key states that: The PK must uniquely identify each entity instance. A primary key must be able to guarantee unique values. It cannot contain nulls.

The “____” characteristic of a primary key states that: The selected primary key must not be composed of any attribute(s) that might be considered a security risk or violation. For example, using a Social Security number as a PK in an EMPLOYEE table is not a good idea.

The “____” characteristic of a primary key states that: The PK should not have embedded semantic meaning. An attribute with embedded semantic meaning is probably better used as a descriptive characteristic of the entity rather than as an identifier.

Composite primary keys are particularly useful as identifiers of composite entities, where each primary key combination is allowed only once in the ____ relationship.

Surrogate primary keys are especially helpful when there is no ____ key.

____ keys work with primary keys to properly implement relationships in the relational model.

The preferred placement for a foreign key when working with a 1:1 relationship is ____.

____ data refer to data whose values change over time and for which you must keep a history of the data changes.

A ____ occurs when you have one entity in two 1:M relationships to other entities, thus producing an association among the other entities that are not expressed in the model.

____ relationships occur when there are multiple relationship paths between related entities.

According to the data modeling checklist, ____ should clearly define participation and cardinality rules.