5 Questions
What type of relationship is defined between a class and a set of member classes?
Identifying Relationship
What type of entity is a subclass that depends on the existence of a superclass?
Weak Entity
What is the term for the primary key of a weak entity that is partially dependent on the primary key of the strong entity?
Partial Key
What is the process of creating a new entity type from an existing entity type?
Generalization
What type of entity is used to represent a many-to-many relationship between two entities?
Associative Entity
Study Notes
Types of Entities
- Student grades depend on the student and the course
Generalization
- Inheritance that encapsulates common characteristics of many subordinate entities
- Example: a car entity consists of engine, chassis, gear box, etc. as its subordinate entities
Specialization and Generalization Abstractions
- ERD in its original form did not support these abstractions
- Specialization defines a set-superset relationship between a class and a set of member classes
Test your understanding of object-oriented programming concepts, including generalization, inheritance, and encapsulation. Learn how to identify and apply these principles in software design. Improve your skills in programming and software development.
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