Question at position 30 With the database approach, data descriptions are stored in a central location known as a: repository. mainframe. server. PC.单项选择题
A
repository.
B
mainframe.
C
server.
D
PC.

Question

Question at position 30 With the database approach, data descriptions are stored in a central location known as a: repository. mainframe. server. PC.

BlackTom AI · Accepted Answer

A central catalog that holds metadata — names, types, constraints, relationships, and descriptions of data — is called a repository. In database terminology this repository is often implemented as the data dictionary or system catalog managed by the DBMS.

1) Relevant knowledge points and concepts
- Metadata = data about data (field names, formats, keys, relationships, access rules).
- Repository/Data dictionary/System catalog = centralized storage for metadata in a database approach.
- Benefits of a central repository: consistency, controlled access, easier maintenance, data independence, and support for tools and queries that need schema information.

2) Step-by-step reasoning
- The phrase “data descriptions” refers to metadata rather than raw data records.
- In a database approach, metadata must be stored centrally so all applications and users refer to the same definitions.
- The DBMS provides a central metadata storage often called a repository (or data dictionary/system catalog).
- Therefore the correct label for “central location” holding these data descriptions is repository.

3) Intermediate/illustrative steps
- Identify what is being stored: descriptions (metadata).
- Map that function to known terms: metadata storage = repository/data dictionary.
- Compare to other options (see next section) and eliminate them.

4) Why the correct answer is correct
- A repository explicitly denotes a place where metadata/data descriptions are centrally stored and managed. It captures schema, constraints, and other descriptive information required by a database approach.

5) Why other options are incorrect
- Mainframe: a type of large computer system (hardware), not the conceptual storage for metadata.
- Server: a machine or software service that provides resources; not the specific term for metadata storage (though a repository may be hosted on a server).
- PC: a personal computer; unrelated to the database concept of a central metadata store.

Conclusion: The correct answer is repository., which matches the provided answer.

Question at position 30 With the database approach, data descriptions are stored in a central location known as a: repository. mainframe. server. PC.单项选择题

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