True or False: When using create() or update(), all records must be of the same sObject type.

The assertion that all records must be of the same sObject type when using create() or update() is false. In Salesforce, the create() method is designed to accept a list of sObject records, but this list does not have to consist entirely of records of the same type. This flexibility allows developers to work with different sObject types within a single operation, which is particularly useful in various integration scenarios.

The same principle applies to the update() method; it can also handle multiple sObject types as long as they are managed properly within their respective contexts. This design choice enhances Salesforce's capability to handle diverse data operations in a streamlined manner, reducing the need for multiple API calls and thus improving performance.

Understanding this characteristic is crucial for effective implementation of Salesforce integration strategies, especially when dealing with complex data models and interactions.