1 AWS Pricing Fundamentals Free Online FlashCards

What does pay-as-you-go mean in AWS pricing?

AWS generally uses pay-as-you-go pricing: you pay for the resources and activity you use rather than buying equivalent infrastructure in advance.

What measurable units can contribute to an AWS service bill?

A bill may reflect time, capacity, storage, requests or operations, data transfer, and configuration. A service can combine several of these dimensions.

What can make AWS unit rates vary?

Rates can vary by service, Region, configuration, and pricing option; some services also change unit rates across usage tiers.

Which factors commonly affect an EC2 instance’s compute charge?

EC2 compute charges commonly depend on instance type, Region, operating system or software license, and how long the instance runs.

When is EC2 On-Demand a suitable purchase option?

On-Demand is suited to flexible usage without a long-term commitment.

What tradeoff can Savings Plans and Reserved Instances offer?

Savings Plans and Reserved Instances can lower eligible costs in exchange for a usage or configuration commitment.

What workload characteristic suits EC2 Spot Instances?

Spot Instances use spare capacity at a discount, but may be interrupted; they suit workloads that can tolerate interruptions.

Why might stopping an EC2 instance not eliminate all related costs?

Stopping or terminating unneeded resources can reduce usage-based compute charges, but attached resources such as storage may continue to incur costs.

Besides stored data volume, what can affect Amazon S3 charges?

S3 charges can depend on stored volume and duration, storage class, requests, retrievals, and certain data-management or replication features.

What should guide the choice of an S3 storage class?

Compare access patterns and all applicable charges: less frequently accessed classes may have retrieval charges or minimum-storage-duration rules.

What costs can arise when using an archival S3 class?

Retrieving archived data or moving objects between classes can add charges, even when the archival class has lower storage costs.

Is internet data transfer into AWS always free?

Transfer into AWS from the internet is generally not charged, but this is not a universal rule for every service or transfer path.