A team has an application that detects new objects being uploaded into an Amazon S3 bucket. The uploads trigger a Lambda function to write object metadata into an Amazon DynamoDB table and RDS PostgreSQL database.
Which action should the team take to ensure high availability?
A. Enable cross-region replication in the Amazon S3 bucket.
B. Create a Lambda function for each Availability Zone the application is deployed in.
C. Enable multi-AZ on the RDS PostgreSQL database.
D. Create a DynamoDB stream for the DynamoDB table.
DynamoDB databases are Highavailable by default unlike RDS so to ensure HA you should focus on enabling Multi-AZ on the RDS PostgreSQL
@isla it is AWS who says that ... I got this from the AWS documentation: stores data on Solid State Drives (SSDs) and replicates it synchronously across multiple AWS Availability Zones in an AWS Region to provide built-in high availability and data durability.
so you don't need to do anything to ensure DynamoDB HA it's not the case with RDS