ODBC capability tiers Which features are part of the ODBC Level 1 API (beyond the core), considering standard portability goals?

Introduction / Context:
Beyond the core ODBC API, Level 1 and Level 2 add optional capabilities that enhance portability and developer ergonomics. Understanding which tier introduces which feature helps teams set realistic cross-platform expectations and decide which functions to rely upon.

Given Data / Assumptions:

• We focus on ODBC Level 1, not core or Level 2.
• Typical Level 1 additions include basic catalog and connection discovery features.
• Scrollable cursors are considered a more advanced feature, commonly associated with Level 2.

Concept / Approach:

ODBC Level 1 extends the core with functionality such as enumerating or browsing available drivers and data sources, enabling applications to discover connection options at runtime. Features like scrollable cursors are generally provided in Level 2, not Level 1. Driver-specific connection mechanisms exist, but the question asks about standard Level 1 features rather than vendor-specific extensions.

Step-by-Step Solution:

Verification / Alternative check:

Historical ODBC documentation and summaries categorize discovery/catalog helpers under Level 1, with enhanced cursor navigation and positioned updates commonly under Level 2.

Why Other Options Are Wrong:

• B: Driver-specific connection methods are not what Level 1 standardizes.
• C/D: Scrollable cursors are Level 2, not Level 1.
• E: Level 1 adds more than diagnostics; it includes discovery features.

Common Pitfalls:

• Assuming all cursor features arrive in Level 1; many are Level 2.
• Relying on vendor extensions that reduce portability.

Final Answer:

Browse possible connections and data sources only.