Section 3.4

All exams belong to a course. A course must exist before course exams are created. When a course is deleted, course exams are also deleted. Courses are always part of an academic department. We set up academic departments in the database before we add courses. Exam-BelongsTo-Course (Match)

Dependency relationship

All exams belong to a course. A course must exist before course exams are created. When a course is deleted, course exams are also deleted. Courses are always part of an academic department. We set up academic departments in the database before we add courses. Exam (Match)

Dependent entity

Determining cardinality always precedes distinguishing independent and dependent entities.

False

Distinguishing independent and dependent entities is a logical design activity.

False

All exams belong to a course. A course must exist before course exams are created. When a course is deleted, course exams are also deleted. Courses are always part of an academic department. We set up academic departments in the database before we add courses. AcademicDepartment (Match)

Independent entity

All exams belong to a course. A course must exist before course exams are created. When a course is deleted, course exams are also deleted. Courses are always part of an academic department. We set up academic departments in the database before we add courses. Course and AcademicDepartment (Match)

Master entity

How many dependency relationships can each dependent entity have?

One or many

How often is a master entity also an independent entity?

Sometimes

Database designers can look for dependency relationships first, before identifying dependent entities.

True

______ is a modeling standard intended for software development

Unified Modeling Language

How many dependent entities can depend on one independent entity?

Zero, one, or may

In some diagrams, 'many' is depicted with ______ notation.

crows feet

A group of related entities is often called a/an ______ .

subject area

In some models, dependent entities are called ______ entities.

weak