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Zorluk: KolayAWS Free Tier

An individual developer is utilizing the AWS Free Tier (12-Month Free) to host small applications. During a 30-day month, the developer runs two t2.micro Amazon EC2 Linux instances continuously at the same time. How will the developer be billed for this EC2 usage?

  1. The developer is billed at standard On-Demand rates for the EC2 hours that exceed the combined 750-hour monthly Free Tier limit.Cevap
  2. B
    Both instances run completely free of charge because the 750-hour monthly limit applies to each EC2 instance individually.
  3. C
    The developer is billed for all hours of the second instance because the Free Tier only allows one active EC2 instance at a time.
  4. D
    The developer must pay an upfront capital expense (CapEx) to secure the Free Tier pricing model before launching the second instance.

Cevap

The developer is billed at standard On-Demand rates for the EC2 hours that exceed the combined 750-hour monthly Free Tier limit.
The correct answer is correct because the AWS Free Tier provides 750 hours of combined monthly usage for t2.micro or t3.micro instances. When running multiple instances concurrently, their run hours are added together. In a 30-day month, two instances run for a total of 1,440 hours, meaning the developer is billed for the 690 hours that exceed the 750-hour limit.

Adım Adım Çözüm

1
Calculate the total hours of EC2 usage for the month.
Two instances running continuously for a 30-day month results in 2×30 days×24 hours/day=1,440 hours2 \times 30 \text{ days} \times 24 \text{ hours/day} = 1,440 \text{ hours} of usage.
Total usage must be calculated to compare against the AWS Free Tier limit.
2
Compare the total hours against the AWS Free Tier limit and identify the billing outcome.
The Free Tier provides 750 free hours. The excess usage is 1,440750=690 hours1,440 - 750 = 690 \text{ hours}, which is billed at the standard On-Demand rate.
Since the 750-hour limit is aggregated across all running instances, any hours beyond 750 are billable.

Anahtar Kavram

AWS Free Tier EC2 limits are aggregated monthly across all active instances.
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