Salesforce Platform Developer I (legacy) — Question 259

A developer wrote Apex code that calls out to an external system using REST API.

How should a developer write the test to prove the code is working as intended?

Answer options

• A. Write a class that extends WebServiceMock.
• B. Write a class that implements HTTPCalloutMock.
• C. Write a class that extends HTTPCalloutMock.
• D. Write a class that implements WebServiceMock.

Correct answer: C

Explanation

The correct answer is C because extending HTTPCalloutMock allows the developer to simulate responses for HTTP callouts in tests. Options A and D are incorrect as they pertain to WebServiceMock, which is not suitable for REST API callouts. Option B is also incorrect because while it implements HTTPCalloutMock, it does not extend it, which is necessary for creating a mock response.