A logical representation of the data for an organization or for a business area is known as an entity-relationship model.
A logical representation of the data for an organization or for a business area is known as an entity-relationship model.
An oval represents which of the following in an ERD?
An oval represents which of the following in an ERD?
Output reports should be included as part of an ERD.
Output reports should be included as part of an ERD.
A good identifier is which of the following?
A good identifier is which of the following?
Some business rules cannot be represented in common data modeling notation.
Some business rules cannot be represented in common data modeling notation.
A derived attribute is an attribute whose values can be calculated from a related relationship.
A derived attribute is an attribute whose values can be calculated from a related relationship.
A strong entity is an entity whose existence depends on some other entity type.
A strong entity is an entity whose existence depends on some other entity type.
An attribute is a person, place, object, event in a user environment.
An attribute is a person, place, object, event in a user environment.
Which of the following conditions should exist if you want to convert a relationship to an associative entity?
Which of the following conditions should exist if you want to convert a relationship to an associative entity?
A binary relationship is a relationship between two or more entities.
A binary relationship is a relationship between two or more entities.
No two attributes of the same entity type should have the same name.
No two attributes of the same entity type should have the same name.
A binary relationship cannot be which of the following?
A binary relationship cannot be which of the following?
Relationships cannot have attributes.
Relationships cannot have attributes.
A relationship is which of the following?
A relationship is which of the following?
When the minimum number of instances of an entity is one, you know which of the following?
When the minimum number of instances of an entity is one, you know which of the following?
Cardinality specifies the number of instances of one entity that can be associated with each instance of another entity.
Cardinality specifies the number of instances of one entity that can be associated with each instance of another entity.
A binary relationship is which of the following?
A binary relationship is which of the following?
A rectangle represents which of the following in an ERD?
A rectangle represents which of the following in an ERD?
Business rules and policies are universal.
Business rules and policies are universal.
If there are two entities with a relationship between them, and one of the entities is completely dependent on the other, then which of the following must exist?
If there are two entities with a relationship between them, and one of the entities is completely dependent on the other, then which of the following must exist?
A time stamp is a time value that is associated with a data value.
A time stamp is a time value that is associated with a data value.
A composite attribute is which of the following?
A composite attribute is which of the following?
An attribute name should be which of the following?
An attribute name should be which of the following?
A fact is a word or phrase that has a specific meaning for the business.
A fact is a word or phrase that has a specific meaning for the business.
A good business rule is which of the following?
A good business rule is which of the following?
An entity name should be which of the following?
An entity name should be which of the following?
Multiple and binary relationships are the same thing.
Multiple and binary relationships are the same thing.
A relationship is an association representing the interaction between attributes.
A relationship is an association representing the interaction between attributes.
A ternary relationship involves how many entities?
A ternary relationship involves how many entities?
When the minimum and maximum number of instances of an entity is one, you know which of the following?
When the minimum and maximum number of instances of an entity is one, you know which of the following?
