Does ODBC provide a DBMS-independent interface that Web server programs (and other applications) can use to access and process relational data sources?
Correct Answer: Correct
Introduction / Context:Web applications frequently need to access relational data from different DBMSs. ODBC, by design, offers a DBMS-independent API so that applications can switch drivers with minimal code changes. This question asks whether ODBC provides such a neutral interface for Web server programs.
Given Data / Assumptions:
- ODBC applications call a standard set of C APIs.
- ODBC drivers translate those calls into DBMS-specific wire protocols and SQL dialects.
- Web servers typically run application code (CGI, ISAPI, FastCGI, native modules) that can link to ODBC libraries.
Concept / Approach:ODBC’s purpose is to abstract the DBMS so that application code can remain largely unchanged when swapping back ends. As long as there is an appropriate ODBC driver and DSN/connection string, the same code can run against different databases. Therefore, the statement is correct.
Step-by-Step Solution:
Write Web code that uses ODBC connection, prepare/execute statements, and fetch results.Configure a DSN for Database A and verify functionality.Switch the DSN to Database B with a compatible schema; re-run without recompiling.Observe that the ODBC layer handled the DBMS specificity.Verification / Alternative check:Replace a SQL Server ODBC driver with a PostgreSQL ODBC driver; adjust only DSN parameters and confirm that the core program logic is unchanged.
Why Other Options Are Wrong:
- No OLE DB pairing is necessary; ODBC works independently.
- ODBC is not tied to any particular Web server product.
- Server and desktop databases alike can be accessed via appropriate drivers.
Common Pitfalls:Assuming SQL dialects will always be identical; in practice, minor SQL differences may require adjustments even with ODBC.
Final Answer:Correct