AWS Cost Management Flashcards

Which approach reduces NAT Gateway data processing costs in a VPC?

Answer: Using VPC endpoints (Gateway endpoints) for S3 and DynamoDB traffic

Gateway VPC endpoints route S3 and DynamoDB traffic privately, bypassing NAT Gateway data charges.

What is the recommended way to manage costs across many AWS accounts in a large enterprise?

Answer: AWS Organizations with consolidated billing and Cost Categories

AWS Organizations with consolidated billing and Cost Categories centralizes and structures multi-account cost management.

Which EC2 option provides a discount for a steady commitment while still allowing you to switch instance families?

Answer: Convertible Reserved Instances

Convertible RIs allow exchanging for different instance families, OS, or tenancy while keeping a discount.

How can you reduce Lambda costs for predictable, high-volume functions?

Answer: Apply a Compute Savings Plan and right-size memory allocation

Compute Savings Plans cover Lambda usage, and tuning memory optimizes the cost-performance balance.

Which metric in Cost Explorer helps identify whether your Savings Plans commitment is being fully used?

Answer: Savings Plans utilization

Savings Plans utilization shows what percentage of your committed spend is actually consumed.

What is a cost benefit of using Graviton (ARM-based) instances?

Answer: They typically offer better price-performance than comparable x86 instances

Graviton instances generally deliver better price-performance than equivalent x86 EC2 instances.

Which practice helps avoid paying for forgotten or orphaned resources?

Answer: Regularly reviewing Trusted Advisor and tagging resources for ownership

Routine Trusted Advisor reviews plus ownership tags help identify and clean up idle or orphaned resources.