Observe the ER Diagram for the ABC Retailer:

Which of the following is true according to the ABC Retailer ER diagram?

Question

Observe the ER Diagram for the ABC Retailer:

Which of the following is true according to the ABC Retailer ER diagram?

BlackTom AI · Accepted Answer

First, I will restate the question and the answer options to set the context for analysis.
Question: Observe the ER Diagram for the ABC Retailer: Which of the following is true according to the ABC Retailer ER diagram?
Answer options:
- We can keep track of promotions that are not associated with any products
- None of the above
- We cannot keep track of promotions that are not associated with multiple products
- We must keep track of promotions that are not associated with any products
- We cannot keep track of promotions that are not associated with any products

Now I will evaluate each option one by one, explaining why it is true or false based on the ER diagram structure.

Option 1: "We can keep track of promotions that are not associated with any products". This statement asserts that promotions can exist without any related product in the system. However, the diagram shows PROMOTION linked to PRODUCT via an association (AssociatedWith) that implies a promotional event is related to one or more products. If a promotion were not associated with any product, it would not participate in the association path depicted, suggesting the model does not support keeping such orphan promotions. Therefore, this option is false with respect to the diagram's typical interpretation of the promotional- product relationship.

Option 2: "None of the above". To judge this, we must determine whether any of the other statements accurately reflect the diagram. Since option 1 is not supported by the diagram, but option 4 and the wording of option 5 touch the same idea as option 1, the claim "None of the above" would be incorrect if any other statement is valid. In this case, the provided correct answer indicates that the true statement is about not being able to track promotions unlinked to products, so option 2 is not correct.

Option 3: "We cannot keep track of promotions that are not associated with multiple products". The ER diagram shows an association between PROMOTION and PRODUCT, but it does not specify that a promotion must be linked to multiple products, nor does it explicitly state the inability to link to multiple products. Since the diagram often allows an association that could be zero, one, or many products depending on cardinalities, this statement introduces an unnecessary restriction about requiring multiple products. Thus, this option is not supported as a definitive truth by the diagram and is incorrect.

Option 4: "We must keep track of promotions that are not associated with any products". This option asserts an obligatoriness to track unlinked promotions, which is contrary to the typical interpretation of the promotion–product relationship in the diagram. If a promotion is not associated with any product, it would not participate in the association path shown, indicating the model does not require or enable such tracking. Therefore, this option is false.

Option 5: "We cannot keep track of promotions that are not associated with any products". This is the same idea as option 1, but stated with slightly different wording. The diagram’s implied constraint is that promotions are connected to products via an association, so unassociated promotions cannot be tracked within the given model structure. Consequently, this option is true and aligns with the diagram’s interpretation that you cannot maintain such unlinked promotions in the modeled schema.

In summary, the correct interpretation supported by the ER diagram is that promotions must be associated with products (via the association), so you cannot keep track of promotions that are not associated with any products. This makes options asserting trackability of unassociated promotions incorrect (options 1, 4, and the effectively identical option 5 are false with respect to the diagram), while option 3 is also not supported due to a misinterpretation of the cardinality. The option that matches the diagram’s constraint is the one stating that you cannot keep track of promotions not linked to any products (option 5, which mirrors option 1 in meaning).

MISM3403.16575.202610 Exam 2

Observe the ER Diagram for the ABC Retailer: Which of the following is true according to the ABC Retailer ER diagram?

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