10 real AWS DevOps Pro questions.

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A rule built from this document is rejected when the team tries to create it. Which line is the problem?

• The "detail-type" value must be an array — every leaf value in a pattern is a list of acceptable values, even when there is only one
• The "source" value should be "aws.cloudtrail", because instance state changes are recorded by CloudTrail
• The "state" field must be nested under "detail-type", not under "detail"
• A "region" field is required so the rule knows which Region's events to match