EMERGING TRENDS IN SOFTWARE ENGINEERING
MISCELLANEOUS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Association
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Inheritance
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Aggregation
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Class
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Detailed explanation-1: -A unary relationship, also called recursive, is one in which a relationship exists between occurrences of the same entity set. In this relationship, the primary and foreign keys are the same, but they represent two entities with different roles. See Figure 8.9 for an example.
Detailed explanation-2: -Degree of a relationship-the number of entity types that participate in a relationship. Cardinality constraint-specifies the number of instances of one entity that can be associated with each instance of another entity.
Detailed explanation-3: -Cardinality. Defines the numerical attributes of the relationship between two entities or entity sets. The three main cardinal relationships are one-to-one, one-to-many, and many-many.