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AWS Certified Solutions Architect - Professional · AWS
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For multi-tenant cost allocation on shared DynamoDB tables, you must track consumption (RCU/WCU) at the application level per tenant.
This is a tricky question as A and B are suitable. The difference is - A is not as "granular" as B (lambda adds more detail) on the other Hand - A is simpler "less operational Overhead" then "B"(you have to maintain additional lambda code) Now they want "granular" and "least operational overhead" - which is a contradiction. As I read it, they want a "granular" solution. Out of the possible granular solutions they want the one with the least overhead. Hence I go for B.
A is the answer : for D- GuardDuty alerts after threats—it does not prevent deletion or modification. No mention of object lock, versioning, or backup/replication. An attacker with sufficient credentials could still erase evidence and data.