Ravi Sir's Cards › AWS
Who waits?
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
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What this card says
Who waits?
Sync API to DynamoDB
Caller waits until the row is written.
Async API via SQS
Caller gets 202; worker writes later.
Key points
Simple CRUD notes.
Spiky checkout that must stay fast.
Example
POST creates note immediately.
Use when
Direct write APIs.
Decoupled intake.