AWS DevOps I/O Configuration & Sensors 5

Question 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?

Accepted Answer

IoT rule action → SNS topic → multiple SQS queues

Answer

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

Question 2

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

Accepted Answer

Automation document (AWS-type Automation)

Answer

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

Question 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?

Accepted Answer

PutJobSuccessResult / PutJobFailureResult API calls

Answer

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

Question 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?

Accepted Answer

Amazon Lookout for Metrics

Answer

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

Question 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?

Accepted Answer

LOCAL cache

Answer

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

AWS Practice Test

AWS Practice Test

AWS DevOps I/O Configuration & Sensors 5