If an entity appears in only one relationship then it is

Related MCQs

• An entity in A is associated with at most one entity in B, and an entity in B is associated with at most one entity in A.This is called as
• If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has
• In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.
• An entity in A is associated with at most one entity in B. An entity in B, however, can be associated with any number (zero or more) of entities in A.
• There are similarities between the instructor entity set and the secretary entity set in the sense that they have several attributes that are conceptually the same across the two entity sets: namely, the identifier, name, and salary attributes. This process is called
• The function that an entity plays in a relationship is called that entity’s _____________
• Consider the employee work-team example, and assume that certain employees participate in more than one work team. A given employee may therefore appear in more than one of the team entity sets that are lower level entity sets of employee. Thus, the generalization is                            
• Entity Relationship model consists of collection of basic objects called _________ and relationship among these objects.
• A                            constraint requires that an entity belong to no more than one lower- level entity set.
• For a weak entity set to be meaningful, it must be associated with another entity set, called the