Medium-Easy Understand AWS Cloud Services open_ended

What is the purpose of a NAT Gateway and where must it be placed?

Understand — Tests comprehension and ability to explain concepts.

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This question is from the AWS Cloud Services topic (Cloud Computing).

Which AWS feature provides automatic failover for RDS within the same region when the primary DB instance fails?

An S3 presigned URL is generated server-side. Which of the following is true about its security?

What is a Lambda cold start, and which configuration reduces it most effectively for latency-sensitive workloads?

You have a DynamoDB table with userId as partition key. You need to query orders by status across all users. What do you add?

What is the difference between a Security Group and a Network ACL (NACL) in a VPC?