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idef1x Crowsfoot Chen Models
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Entity Relationships - Quiz
Each question is worth one point. Select one answer for each of the five questions.
1.
One A may relate to zero, one or many Bs, and one B may relate to zero, one or many As. What is the maximum-cardinality relationship?
Please select the best answer.
A.
1:1 relationship
B.
1:N relationship
C.
M:N relationship
2.
One A may relate to zero, one or many Bs, while one B may relate to zero or one A. What is the relationship from A to B?
Please select the best answer.
A.
1:1 relationship
B.
1:N relationship
C.
M:N relationship
3.
One A may relate to zero or one B, and one B may relate to zero or one A. What is the relationship?
Please select the best answer.
A.
1:1 relationship
B.
1:N relationship
C.
M:N relationship
4.
Each instance of B may relate to zero or one instance of A. What is the participation of B in this relationship?
Please select the best answer.
A.
Mandatory participation
B.
Optional participation
C.
None of the above
5.
Each instance of A must relate to exactly one instance of B. What is the participation of A in this relationship?
Please select the best answer.
A.
Mandatory participation
B.
Optional participation
C.
None of the above
Submit