Which of the following methods can effectively reduce latency in API responses?

The method of optimizing server performance and using caching strategies effectively reduces latency in API responses by addressing two critical aspects of API performance.

First, optimizing server performance can involve improvements such as better resource allocation, efficient database queries, and load balancing. These enhancements help ensure that the server processes requests more quickly and handles higher loads without significant delays.

Second, caching strategies significantly reduce the time it takes to serve repeated requests. When data is cached, it is stored temporarily for quick access, allowing the server to return responses swiftly without querying the database or performing heavy computations each time. This reduction in processing time directly translates to lower latency for end-users.

By combining these two approaches, overall responsiveness of the API improves, thereby making it a robust solution for minimizing latency. Other methods, while potentially beneficial under specific circumstances, do not directly contribute to reducing the time it takes for an API to respond as effectively as this comprehensive strategy does.