Tools / Datadog Interview questions
How does Datadog's Cloud Cost Management attribute spend?
It ingests detailed billing export data from cloud providers, such as an AWS Cost and Usage Report, which breaks charges down to the individual resource level rather than a single lump sum per account.
That resource-level billing data is then joined against the tags already applied to those same resources - team, service, environment - so cost can be sliced along the same dimensions engineers already use for performance monitoring, without a separate cost-tagging project.
Resources that are untagged, or inconsistently tagged, typically fall into an 'unallocated' or 'untagged' bucket in the resulting cost breakdown, which is itself a useful signal pointing at where tagging hygiene needs improvement before attribution can be fully accurate.
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