Question at position 15 The name used for an entity type should never be the same in other E-R diagrams on which the entity appears. TrueFalse单项选择题
A
True
B
False

Question

Question at position 15 The name used for an entity type should never be the same in other E-R diagrams on which the entity appears. TrueFalse

BlackTom AI · Accepted Answer

Entity type names are intended to represent the same real-world concept across designs, so consistent naming is usually preferred rather than prohibited.

Relevant knowledge points:
- An E-R (Entity-Relationship) diagram models entities (types) and relationships.  
- Naming an entity type identifies that concept (e.g., Customer, Product).  
- Consistency in naming across diagrams aids clarity, integration, and mapping when multiple diagrams represent the same domain or portions of a larger schema.  
- Different diagrams can reflect different views, levels of abstraction, or separate systems; names can be changed deliberately, but there is no rule forbidding reuse.

Step-by-step reasoning:
1. Interpret the statement: it claims that a name used for an entity type should never be the same in other E-R diagrams where that entity appears. That is an absolute prohibition of reuse.  
2. Compare to modeling practice: Modelers normally reuse the same entity type name across diagrams to show they represent the same concept (e.g., “Employee” in HR and Payroll diagrams). Reuse supports merging diagrams and consistent database design.  
3. Consider counterexamples: When the same real-world concept appears in several diagrams (sales, support, analytics), it is appropriate and common to use the same name. This directly contradicts the statement’s “never be the same” claim.  
4. Conclusion from reasoning: the statement is false.

Why False is correct:
- The statement conflicts with standard practice and logical modeling principles. Reusing the same name across diagrams is often desirable to indicate identity of the entity type. While renaming can occur when contexts differ or to avoid ambiguity, saying names should never be the same is incorrect.

Why True is incorrect:
- Marking the statement True would assert an absolute rule that prevents helpful reuse and would lead to unnecessary confusion and duplication.

Final confirmation: The correct answer is False, which matches the provided answer.

Question at position 15 The name used for an entity type should never be the same in other E-R diagrams on which the entity appears. TrueFalse单项选择题

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Question at position 8 The name used for an entity type should never be the same in other E-R diagrams on which the entity appears. TrueFalse

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