Google Professional Cloud Developer Question 270
Select 3Google Cloud PlatformYou are developing a serverless application on Google Cloud using Cloud Functions, and you want to ensure that your code is reliable and performs well under various conditions. Considering best practices for testing in Google Cloud, which of the following actions should you take to comprehensively test your application?
- A
Write unit tests to validate the functionality of individual functions using mock dependencies.
- B
Deploy the application to production and use real user data for testing performance and reliability.
- C
Create integration tests to validate the interaction between Cloud Functions and other services, such as Pub/Sub and Firestore.
- D
Perform load testing in an isolated environment to measure how the application scales under increased traffic.
- E
Skip end-to-end testing because serverless applications automatically handle most operational concerns like scaling.
Show answer and explanation
Correct answers: A, C, D
Explanation
Testing is a critical part of application development, especially for serverless architectures on Google Cloud. Unit tests validate individual components, integration tests ensure proper communication between services, and load testing provides insights into scalability. These practices together ensure a reliable, robust, and scalable application. Testing must be done in controlled environments, and skipping end-to-end testing is not advisable, even for serverless applications.
- A. Correct.
Unit tests are a fundamental part of testing that help validate the correctness of isolated pieces of functionality. Mocking dependencies ensures that tests are fast, reliable, and not dependent on external services.
- B. Incorrect.
Testing directly in production with real user data is a bad practice because it can lead to unexpected issues, data corruption, and poor user experience. Testing should be done in controlled environments.
- C. Correct.
Integration tests ensure that different components of your application work together as expected, which is crucial for serverless architectures that often depend on multiple Google Cloud services.
- D. Correct.
Load testing in an isolated environment allows you to understand how your application behaves under various levels of traffic and ensures scalability, which is critical for serverless applications.
- E. Incorrect.
End-to-end testing is essential for identifying issues across the entire workflow of your application. Skipping it can lead to undetected issues, even in a serverless architecture.