Which of the following data dictionary entries is INCORRECT for a data store?

Question

BlackTom AI · Accepted Answer

A data store's data dictionary entry must document its identity, content, and how processes interact with it — including both input and output data flows — so "Output data flow: N/A" is incorrect.

1) Relevant knowledge points and concepts
- A data dictionary entry for a data store typically includes: Name/ID, Data structure (the fields and types stored), Description/purpose, Input data flows (who writes to it), Output data flows (who reads from it), and storage details/constraints. Data Flow Diagrams (DFDs) model data movement; a data store that has no output flows would never be read by any process, which is either an error or must be explicitly justified.

2) Step-by-step reasoning
- Check A: "Name: D2 Customer Information" — valid. Names commonly use an identifier (D2) plus a descriptive label. This is a correct and expected entry.
- Check B: "Data Structure: EmployeeID, Name, Address, Gender" — this is a proper way to list data elements/fields for a store. Even if the field EmployeeID sounds like an employee rather than a customer, the structure format is valid as a data dictionary element. The entry type is correct.
- Check C: "Output data flow: N/A" — this claims there are no output/read flows from the store. In conventional data dictionary practice, both input and output flows should be documented; a store with no outputs implies it is never read (effectively unused), which is incorrect or at least incomplete documentation. Therefore marking output flows as N/A is not a correct/complete entry for a typical data store.
- Check D: "Description: Stores transcation records" — despite a minor spelling error ("transcation" → "transaction"), the entry type (a description of what the store holds) is correct and expected.

3) Intermediate checks/calculations
- No numeric calculations are needed; this is a structural/documentation check against standard data dictionary content.

4) Why the correct answer is correct
- Option C is incorrect because a proper data store entry must identify output data flows (who reads the data). Listing "N/A" omits required interaction information and thus is not a correct data dictionary entry.

5) Why other options are incorrect
- A, B, and D are valid types of entries: A provides a proper name/ID; B lists the data structure fields; D gives the purpose/contents. Minor issues (naming consistency or a typo) do not make them incorrect entry types.

Conclusion: Option C ("Output data flow: N/A") is the incorrect data dictionary entry for a data store, matching the provided correct answer.

Which of the following data dictionary entries is INCORRECT for a data store?单项选择题

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