Web API Development with Flask (Video 15)

This video tutorial explores caching in web applications and APIs, focusing on types of caching, Etag, and cache control. It discusses advanced techniques like reverse proxy caching and tools such as Redis and Hazelcast. The video also demonstrates practical implementation in a Python application, setting HTTP headers and using Postman for testing. The tutorial concludes with a summary and a preview of the next topic on error handling in RESTful APIs.

What is an ETag primarily used for in web applications?

• To compress files

• To encrypt data

• To uniquely identify a request

• To authenticate users

Which of the following is a potential downside of using caching tools like Redis extensively?

• Increased security risks

• Slower application performance

• Higher server costs

• Reduced data accuracy

What is the role of a reverse proxy in caching?

• To authenticate users

• To compress files

• To serve cached responses

• To encrypt data

In the middleware implementation, what is the purpose of setting the cache control header?

• To compress the data

• To authenticate the request

• To encrypt the response

• To specify the maximum age for caching

How is the ETag generated in the middleware example?

• Based on the SHA-256 hash of the data

• Using a timestamp only

• Using a random number generator

• By encrypting the data