Google Professional Cloud Developer Question 459
Select 2Google Cloud PlatformYou have developed a REST API that serves frequently requested data about product details. To reduce latency and improve performance, you decide to implement caching. Which of the following approaches would be the most effective and aligned with Google Cloud best practices for caching the API results?
- A
Use Memorystore (Redis) to cache the API responses for frequently accessed endpoints.
- B
Implement a client-side cache using the browser's local storage to store API responses.
- C
Use Google Cloud CDN to cache static data and configure it to serve dynamic API responses.
- D
Add a Cache-Control header to your API responses to allow HTTP caching by intermediary caches.
- E
Store the API responses in Firestore with an expiration timestamp and query it for cached results.
Show answer and explanation
Correct answers: A, D
Explanation
The best practices for caching API responses in Google Cloud include using managed caching services like Memorystore (Redis) for low-latency access and leveraging HTTP caching by configuring Cache-Control headers. These approaches effectively reduce the load on the API backend and improve response times while adhering to Google Cloud architecture principles. Other options, while potentially useful in specific scenarios, are either not optimal or not aligned with best practices for caching APIs.
- A. Correct.
Using Memorystore (Redis) is a recommended practice for caching API responses as it provides low-latency access to cached data, is managed, and scales easily within Google Cloud.
- B. Incorrect.
While client-side caching can improve performance for users, it is not a comprehensive or scalable solution for server-side API caching and does not align with best practices for API design.
- C. Incorrect.
Google Cloud CDN is effective for caching static data, but it is not designed for dynamic API responses unless you specifically configure it, which adds significant complexity and may not be the most efficient approach.
- D. Correct.
Adding a Cache-Control header to API responses is a widely used and recommended practice for enabling HTTP caching, allowing intermediary caches and client browsers to store responses effectively.
- E. Incorrect.
Firestore can be used to store data, but it is not an ideal caching solution due to higher latency compared to dedicated caching tools like Memorystore.