Exam 8: Structuring System Data Requirements

A ________ relationship is a relationship between instances of two entity types and is the most common type of relationship encountered in data modeling.

An entity ________ is a single occurrence of an entity type.

List at least four requirements for determination questions for data modeling.Include a question and which asset is related to that determination.

A(n)________ is an assertion or rule that governs the validity of data manipulation operations such as insert,update,and delete.

The ________ defines the number of instances of entity B that can (or must)be associated with each instance of entity A.

The ________ shows the static structure of an object-oriented model: the object classes,their internal structure,and the relationships in which they participate.

During requirements structuring,a ________ model represents conceptual data requirements for a particular system.

The term ________ data model means a conceptual data model with some additional properties associated with the most popular type of database technology like relational databases.

A ________ key is an attribute (or combination of attributes)that uniquely identifies each instance of an entity type.

________ data models are generic data models that are designed to be used by organizations within specific industries.

A(n)________ is an operation that does not have any side effects; it accesses the state of an object but does not alter the state.

What is the link between a data model and a DFD?

An ________ model is a detailed,logical representation of the entities,associations,and data elements for an organization or business area.

The technique of hiding the internal implementation details of an object from its external view is known as encapsulation.

A common mistake many people make when they are just learning to draw E-R diagrams,especially if they already know how to do data flow diagramming,is to confuse data entities with ________ and relationships with data flows.

A(n)________ data model is a detailed model that captures the overall structure of organizational data that is independent of any database management system or other implementation considerations.