Exam 7: Structuring System Requirements: Conceptual Data Modeling

Desired features are those that users could live without but that are used to select between design strategies that are of almost equal value in terms of essential features.

A logical data model is prepared during systems analysis.

A product is an example of a(n):

Use a verb or verb phrase to name an entity.

During which of the following steps will you bring the current phase to a close, prepare a report and presentation to management concerning continuation of the project, and get ready to move the project into design?

For each of the following statements, answer "a" if it is a true statement, or answer "b" if the statement is false. -An entity instance is a single occurrence of an entity type.

In theory, if there are four sources of application software, two implementation environments, and three sets of requirements, how many design strategies are possible?

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

While essential features help screen out possible solutions, desirable features help compare alternative design strategies.

A single occurrence of an entity type defines:

Ideally, each data store on a primitive data-flow diagram will be an individual entity.

For each of the examples listed below, indicate if it is a relationship, an entity, or an attribute.(Answers may occur more than once.) -invoice item

Process, logic, and data-model descriptions of a system must be consistent and complete since:

The data modeling perspective that derives the business rules for a data model from an intimate understanding of the nature of the business, rather than from any specific information requirements in screens, reports, or business forms, is referred to as the:

A primary key should be null.

For each of the following statements, answer "a" if it is a true statement, or answer "b" if the statement is false. -A diamond is used to represent an entity.

For each of the following statements, answer "a" if it is a true statement or answer "b" if the statement is false. -On E-R diagrams, relationships are labeled with verb phrases.

When constructing a data model, the analyst needs to know how, when, and where data are processed.

Book, supplier, and state are examples of entity types.

A relationship that the data modeler chooses to model as an entity type best defines: