Connectivity basics: Evaluate this claim about Open Database Connectivity (ODBC): "ODBC requires the specific driver."
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AValid (ODBC needs a DBMS-specific ODBC driver)
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BInvalid (ODBC works without drivers)
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CValid only for JDBC, not ODBC
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DValid only on Linux, not on Windows
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EValid only for cloud databases
Answer
Correct Answer: Valid (ODBC needs a DBMS-specific ODBC driver)
Explanation
Introduction / Context: ODBC is a C-based standard API that enables applications to access data from different DBMS products using a common interface. The portability comes from a driver-manager plus individual drivers that translate calls into each DBMS’s native protocol. This question checks whether you know that an ODBC driver for the specific database is required.
Given Data / Assumptions:
- An application issues SQL through ODBC function calls.
- A driver manager routes calls to a vendor-specific ODBC driver.
- Each DBMS (for example, SQL Server, Oracle, MySQL, PostgreSQL) provides or supports its own ODBC driver.
Concept / Approach: ODBC’s abstraction does not remove the need for a driver. The driver implements protocol details, data type mappings, and features for the target DBMS. Without the correct driver installed and configured (DSN or DSN-less), the connection cannot be established.
Step-by-Step Solution:
Confirm the API used: ODBC requires a driver manager and driver.Identify the target DBMS: select the corresponding ODBC driver.Configure connection (DSN, connection string, authentication).Result: the statement is valid; a specific driver is necessary.Verification / Alternative check: Attempt to connect with only the driver manager present; the connection fails because no driver exists to speak the DBMS wire protocol.
Why Other Options Are Wrong:
- Invalid: contradicts ODBC’s architecture.
- Valid only for JDBC: JDBC also uses drivers, but that does not negate ODBC’s driver requirement.
- Platform- or cloud-only: driver necessity is platform-agnostic.
Common Pitfalls: Confusing ODBC drivers with OLE DB or JDBC drivers; mismatched 32-bit vs. 64-bit driver; missing SSL or authentication options specific to the DBMS.
Final Answer: Valid (ODBC needs a DBMS-specific ODBC driver)