According to the given ER diagram, which of the following statements is not true about any Analyst?

Question

BlackTom AI · Accepted Answer

Take a careful look at what each option asserts and relate it to the given ER diagram.

Option 1: "an Analyst has one AnalystID; different Analysts have different AnalystIDs"
- In the diagram, AnalystID is shown as a key attribute (underlined) of the Analyst entity. This implies each Analyst has exactly one AnalystID, and different Analysts must have distinct IDs. This aligns with typical primary-key semantics. Therefore, this statement is true according to the diagram.

Option 2: "an Analyst has some number of Expertise; different Analysts may have the same collection of Expertise"
- The Expertise attribute appears as an attribute associated with Analyst, drawn as an oval. If Expertise is modeled as a multi-valued attribute (often represented with a double circle) or as a collection of values tied to Analyst, it means an Analyst can have multiple expertise items. It is also plausible for multiple Analysts to share the same set of expertise items (e.g., both know SQL and Python). Thus this statement is consistent with common ER modeling patterns shown here and is true.

Option 3: "an Analyst has one JobTitle; different Analysts may have the same JobTitle"
- JobTitle is presented as an attribute connected to Analyst. This setup implies each Analyst has a single JobTitle, but different Analysts can share the same JobTitle (e.g., both could be labeled "Senior Analyst" or similar). This interpretation matches the diagram, so the statement is true.

Option 4: "an Analyst has one HourlyFee; different Analysts have different HourlyFees"
- The HourlyFee attribute is attached to the Stakeholder side of the relationship (near the Stakeholder and the Consults relationship), not to the Analyst entity itself. This indicates that HourlyFee is a property of Stakeholders (or at least not a property that uniquely belongs to Analyst within this model). Therefore, the claim that an Analyst has one HourlyFee, and that different Analysts have different HourlyFees, is not supported by the diagram. In other words, this statement is not true about Analysts according to the ERD.

In summary, options 1, 2, and 3 align with how the entities and attributes are drawn, while option 4 contradicts the diagram by not attributing HourlyFee to Analyst in this model. The statement asked for is the one not true about any Analyst, which corresponds to option 4.

ISYS2120 (ND) Practice Quiz EFT-S2 2025

According to the given ER diagram, which of the following statements is not true about any Analyst?

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