You are working on a serverless application where each component is designed to execute a distinct operation within an e-commerce checkout process. During the development cycle, you want to confirm that each component functions independently and as expected without making actual calls to cloud services. What technique should you employ within your unit tests to simulate the behavior of the external dependencies?
Create instances of client objects specific to cloud resources within your unit tests
Configure an API management service to handle dependencies during test runs
Reference recorded responses from an object storage service during test execution
Utilize SDK mocking utilities to emulate the behavior of external service calls