Ravi Sir's Cards › AWS
Who waits for the result?
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
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Who waits for the result?
Synchronous invoke
Caller waits for the response.
Asynchronous invoke
Event is queued; Lambda runs later.
Key points
API Gateway → Lambda.
S3, SNS, EventBridge → Lambda.
Example
HTTP 200 with body.
Use when
User-facing APIs.
Background processing.