All 7 Amazon API Gateway questions
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What is Amazon API Gateway and why is it used? What are the different types of APIs you can build with API Gateway? How does API Gateway handle authentication and authorization for incoming requests? What is request throttling in API Gateway and why is it important? How does API Gateway support versioning and staged deployments of an API? What is the difference between edge optimized, regional, and private API Gateway endpoints?
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How can you cache responses in API Gateway to improve performance?

Intermediate

Answer

API Gateway provides a built in caching layer that stores responses from your backend for a configurable time to live period, so repeated requests for the same data can be served directly from the cache instead of hitting your backend service again, which reduces latency and backend load significantly.
aws apigateway update-stage --rest-api-id abc123 --stage-name prod --patch-operations op=replace,path=/cacheClusterEnabled,value=true
Real-world example A weather application caches its API Gateway responses for five minutes, since weather data does not change every second, dramatically reducing the number of calls made to the backend Lambda function.

Common follow-ups: How do you invalidate the API Gateway cache manually?;What cache sizes are available for API Gateway?

Amazon CloudFront & Content Delivery;Monitoring (CloudWatch)
All 7 Amazon API Gateway questions