Exam Plat-Arch-204 Topic 4 Question 45 Discussion

In the world of Salesforce SOAP APIs, the choice of WSDL depends on the nature of the application being built. When an architect needs to build an integration that is org-agnostic-meaning it can work across multiple different Salesforce organizations with varying custom objects and fields-the Partner WSDL is the correct choice.
The Partner WSDL is loosely-typed. It does not contain information about an org's specific custom metadata; instead, it uses a generic sObject structure. This allows a single client application (like a third-party integration tool or a mobile app) to connect to any Salesforce org and dynamically discover its schema at runtime. Because it is not tied to a specific org's metadata, it does not need to be regenerated every time a custom field is added to one of the target orgs.
In contrast, Option A (Enterprise WSDL) is strongly-typed. It is generated specifically for one org and contains hard-coded references to that org's custom objects and fields. While this provides better compile-time safety for internal, single-org integrations, it is unsuitable for an application intended for "more than one Salesforce org" because the WSDL would be invalid for any org that doesn't have the exact same metadata. Option C is a general term; the actual choices provided by Salesforce for integration are the Partner or Enterprise WSDLs. Therefore, for maximum flexibility and reusability across a multi-org landscape, the Partner WSDL is the industry standard.