Salesforce API calls are:

Service Requests and Responses, Asynchronous, Committed Automatically Versus Rollback on Error

Service Requests and Responses, Asynchronous, Rollback on Error

Some of calls are Asynchronous, Rollback on Error

Service Requests and Responses, Synchronous, Committed Automatically Versus Rollback on Error

Answer:
Service Requests and Responses, Synchronous, Committed Automatically Versus Rollback on Error

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