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Which of the following indicates the maximum number of entities that can be involved in a relationship?A. Minimum cardinalityB. Maximum cardinalityC. ERDD. Greater Entity Count (GEC)

Answer: Option B

Which type of entity cannot exist in the database unless another type of entityalso exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?A. Weak entityB. Strong entityC. ID-dependent entityD. ID- independent entity

Answer: Option A

In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.A. parentB. child

C. instanceD. subtype

Answer: Option A

In which of the following is a single-entity instance of one type related to many entity instances of another type?A. One-to-One RelationshipB. One-to-Many RelationshipC. Many-to-Many RelationshipD. Composite Relationship

Answer: Option B

An attribute that names or identifies entity instances is a(n):A. entity.B. attribute.C. identifier.D. relationship.

Answer: Option C

Properties that describe the characteristics of entities are called:A. entities.B. attributes.

C. identifiers.D. relationships.

Answer: Option B

On an entity-relationship diagram, a rectangle represents a(n):

A. data flow.B. entity.C. multivalued attribute.

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D. repeating group.E. relationship.

Answer: B

A named property or characteristic of an entity that is of interest to the organization defines:

A. attribute.B. relationship.C. instance.D. associative entity.E. data flow.

An attribute (or combination of attributes) that uniquely identifies each instance of an entity type defines:

A. data element occurrence.B. identifier.C. trigger.D. associative entity.E. data marker.

Answer: A

An attribute that can have more than one value for each entity instance is referred to as:

A. a gerund.B. a multivalued attribute.C. a nonexclusive attribute.D. a data replica.E. none of the above.

Answer: B

If STUDENT and COURSE participate in a relationship, this is an example of a(n):

A. unary relationship.B. binary relationship.C. ternary relationship.D. extraordinary relationship.E. coupled relationship.

Answer: B

A ternary relationship occurs when a relationship exists among instances of:

A. the same entity.B. two entity types.

C. three entity types.D. four entity types.E. nine entity types.

Answer: C

A relationship between the instances of one entity type is a:

A. unary relationship.B. binary relationship.

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C. ternary relationship.D. singular occurrence.E. partnership occurrence.

Answer: A

A relationship between instances of two entity types is a:

A. unary relationship.B. binary relationship.C. ternary relationship.D. multiple occurrence.E. partnership occurrence.

Answer: B

Which of the following is an extension of the Relational Database model?A. Hierarchical databaseB. Multidimensional databaseC. Network databaseD. Object oriented database

Answer: D

1st Normalization rule is each cell of a table contains only one atomic value.A. TRUEB. FALASE

Answer: A

Composite attributes cannot be further subdivided.A. TRUEB. FALASE

Answer: B

The relationships are displayed as _______ in ER-diagrams.

A. rectanglesB. ovalsC. trianglesD. diamonds

Answer: D

What type of graphical model is used to define a database?A. E-R diagramB. Organizational modelC. Programming modelD. NONE

Answer: A

After you develop a ER-model for your database, you should validate model by _____.

A. normalization rulesB planC. approveD. None of the above

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Answer: A

Converting the M:N relationship into TWO 1:M relationships.A. TRUEB. FALASE

Answer: A