In the standard ER-model direction from the owning strong entity set to the…
2022
In the standard ER-model direction from the owning strong entity set to the weak entity set, a weak entity set must be part of which identifying relationship?
- A.
One-to-one relationship
- B.
One-to-many relationship
- C.
Many-to-many relationship
- D.
None of the above
Attempted by 1917 students.
Show answer & explanation
Correct answer: B
Key direction: The option is read from the owning strong entity set to the weak entity set.
One strong owner can be associated with many weak entities.
Each weak entity must be associated with exactly one strong owner so it can be identified using the owner key plus its partial key.
Therefore, from weak entity to strong owner, the same relationship can be described as many-to-one. The question now states the direction explicitly.
Answer: One-to-many relationship