ACorrect
Economies of scale
Correct. Aggregating demand from millions of customers enables bulk purchasing, which lowers the unit price and allows AWS to continuously pass the savings on to customers while maintaining profitability.
AWS aggregates resource demand from millions of customers to achieve bulk purchasing, and continuously passes the resulting cost savings back to customers. What is this mechanism called?
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Select an answer
CorrectA
Explanation
A question asking which mechanism achieves continuous price reductions through AWS's aggregation of millions of customers.
- 1「millions of customers」An enormous global customer base that enables significant purchasing power.
- 2「bulk purchasing」Procuring resources for millions of customers at once, drastically lowering unit costs.
- 3「continuously passes」The scale effect is ongoing — price reductions recur as the customer base grows, not just once.
BIncorrect
Pay-as-you-go pricing
Pay-as-you-go is the AWS pricing model in which customers pay only for what they use.
It describes how customers are billed, not the mechanism by which aggregated demand and bulk purchasing continuously lower unit prices, so this is incorrect.
CIncorrect
Volume discounts
Volume discounts are tiered price reductions applied when an individual customer's usage increases (for example, Amazon S3 tiered pricing or consolidated billing aggregation).
This is a discount based on a single customer's usage volume, not the mechanism by which AWS aggregates all customers' demand to reduce procurement costs and passes the savings on as lower prices, so this is incorrect.
DIncorrect
Reserved Instance discounts
Reserved Instances are a purchasing option in which customers receive a discount in exchange for committing to 1- or 3-year usage.
This is a discount tied to an individual customer's long-term commitment, not the mechanism by which AWS bulk purchasing achieves lower standard prices for all customers, so this is incorrect.
Key Takeaway
Economies of scale is one of the 6 key benefits of AWS. Along with the CapEx → OpEx shift, it is a critical advantage. When an exam question asks why prices keep falling, look for the keywords 'scale' or 'economies of scale' immediately.