Question at position 3 With the database approach, data descriptions are stored in a central location known as a: PC. repository. server. mainframe.单项选择题
A
PC.
B
repository.
C
server.
D
mainframe.

Question

Question at position 3 With the database approach, data descriptions are stored in a central location known as a: PC. repository. server. mainframe.

BlackTom AI · Accepted Answer

A central metadata store in the database approach is called a repository.

1. Relevant knowledge points and concepts
- Database approach: organizes data so multiple applications share a centralized collection of data managed by a Database Management System (DBMS).
- Data descriptions (metadata): information about the structure, constraints, formats, and relationships of data (schema, data dictionary, catalog).
- Repository (or data repository/metadata repository): a central location where metadata and data descriptions are stored and managed, enabling data independence, consistency, and reuse.

2. Step-by-step reasoning
- Step 1: Recognize that the question asks where data descriptions are stored under the database approach; data descriptions are metadata (schema, definitions).
- Step 2: Identify the correct technical term for a central store of metadata: repository (also called data dictionary or catalog).
- Step 3: Compare each option against the technical definition:
  - PC: personal computer, not a conceptual store for metadata.
  - Repository: matches the definition of a central metadata store.
  - Server: a machine or process that provides services; not specifically the conceptual name for metadata storage.
  - Mainframe: a class of large-scale computer hardware, not the metadata concept.

3. Intermediate conceptual mapping
- Metadata → stored centrally → term used in database literature = repository (or catalog/data dictionary).
- Repository provides centralized management of schema, constraints, and descriptive data for the DBMS.

4. Why the correct answer is correct
- The repository is the standard database concept for a central place that stores data descriptions and metadata used by the DBMS and applications to interpret and enforce schema and constraints.

5. Why other options are incorrect (briefly)
- PC: hardware (personal computer), not a metadata concept.
- Server: a machine or service, not the specific conceptual container for metadata.
- Mainframe: a type of large computer system, not a metadata storage concept.

Conclusion: The correct choice is "repository." This matches the provided answer, repository.

Question at position 3 With the database approach, data descriptions are stored in a central location known as a: PC. repository. server. mainframe.单项选择题

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