Question at position 7 With the database approach, data descriptions are stored in a central location known as a: repository. PC. server. mainframe.单项选择题
A
repository.
B
PC.
C
server.
D
mainframe.

Question

Question at position 7 With the database approach, data descriptions are stored in a central location known as a: repository. PC. server. mainframe.

BlackTom AI · Accepted Answer

Data descriptions (the schema, metadata, data dictionary/catalog) are centrally stored in a repository because a repository is the designated centralized place for metadata in the database approach.

1) Relevant knowledge points and concepts:
- “Data descriptions” refers to metadata: schema definitions, data dictionaries, constraints, and catalog information that describe data structure and meaning.
- In the database approach, metadata must be centrally accessible to ensure consistency, integrity, and shared use by applications and DBMS components.
- The common term for that centralized storage of metadata is a repository (often implemented as a data dictionary or system catalog).

2) Step-by-step reasoning:
Step 1: Identify what is being stored — “data descriptions” = metadata.
Step 2: Determine the role required — centralized, authoritative storage to be used by multiple applications and by the DBMS.
Step 3: Match the correct term: repository is the precise term for a central store of metadata (data repository/data dictionary).
Step 4: Check distractors to ensure they do not match the precise meaning (see next section).

3) Intermediate explanation (no numeric calculations here):
- A repository organizes and preserves metadata so changes propagate consistently; it is a logical place for schema and semantics.
- The DBMS relies on this repository to enforce rules and supply structural information to client programs.

4) Why the correct answer is correct:
“Repository” specifically denotes a centralized store for data descriptions and metadata. It conveys the conceptual and functional role required by the database approach.

5) Why the other options are incorrect:
- PC: refers to a personal computer (hardware), not the conceptual central store for metadata.
- Server: denotes a machine or software service that hosts data; while a repository may reside on a server, “server” is not the term for the metadata store itself.
- Mainframe: a class of large computer hardware; again, it is hardware, not the semantic concept of a metadata store.

Conclusion: The correct choice is “repository.” This matches the provided answer: repository.

Question at position 7 With the database approach, data descriptions are stored in a central location known as a: repository. PC. server. mainframe.单项选择题

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