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I/O Configuration & Sensors Flashcards

7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 I/O Configuration & Sensors flashcards as text

  1. An engineer needs to fan out sensor events from a single IoT topic to multiple independent downstream processors. Which AWS architecture pattern achieves this most efficiently?

    Answer: IoT rule action → SNS topic → multiple SQS queues

    Routing IoT messages to SNS and subscribing multiple SQS queues enables fan-out to independent consumers without tight coupling between processors.

  2. In AWS Systems Manager, which document type defines a configuration remediation workflow that can automatically correct non-compliant EC2 instance settings?

    Answer: Automation document (AWS-type Automation)

    SSM Automation documents define multi-step remediation workflows that can automatically correct configuration drift on EC2 instances.

  3. A CodePipeline pipeline uses a custom action with an external CI system. Which mechanism does the external system use to report job success or failure back to CodePipeline?

    Answer: PutJobSuccessResult / PutJobFailureResult API calls

    External workers poll for jobs using PollForJobs and report outcomes using PutJobSuccessResult or PutJobFailureResult, which are the only way to signal completion to CodePipeline.

  4. An IoT sensor publishes temperature readings every second. A DevOps team wants to detect anomalies using ML without writing custom models. Which AWS service provides this natively?

    Answer: Amazon Lookout for Metrics

    Amazon Lookout for Metrics uses ML to automatically detect anomalies in time-series data like sensor readings without requiring custom model development.

  5. When configuring a CodeBuild project to cache dependencies between builds, which cache type stores the cache on the build host's local disk for the fastest retrieval?

    Answer: LOCAL cache

    CodeBuild LOCAL cache stores files on the build host's ephemeral disk, providing the fastest cache retrieval since no network I/O is required.

  6. A DevOps team deploys configuration updates to thousands of IoT devices using AWS IoT Jobs. Which job configuration parameter prevents overwhelming devices with simultaneous updates?

    Answer: RolloutConfig maximumPerMinute rate limit

    The RolloutConfig maximumPerMinute parameter throttles how many devices receive the job per minute, preventing fleet-wide simultaneous update storms.

  7. Which AWS Config managed rule evaluates whether EC2 instances have the Systems Manager agent running, confirming they can receive remote configuration and I/O commands?

    Answer: ec2-instance-managed-by-systems-manager

    The ec2-instance-managed-by-systems-manager AWS Config managed rule checks that EC2 instances are registered and reachable by SSM, confirming agent connectivity.