AWS DevOps I/O Configuration & Sensors 3 — Questions and Answers
Question 1: An AWS CodePipeline action produces output artifacts that must be consumed by a downstream stage. Where are these artifacts stored by default?
- Amazon EFS shared filesystem
- Amazon S3 bucket managed by CodePipeline (Correct answer)
- AWS CodeCommit repository
- Amazon DynamoDB table
Correct answer: Amazon S3 bucket managed by CodePipeline
CodePipeline stores input and output artifacts in an Amazon S3 bucket it manages, which acts as the shared I/O layer between pipeline stages.
Question 2: When configuring an AWS IoT rule to route sensor telemetry into a Lambda function, which component evaluates incoming MQTT messages to determine whether the rule fires?
- Lambda event source mapping
- IoT Policy document
- IoT Rule SQL statement (Correct answer)
- Kinesis Data Firehose selector
Correct answer: IoT Rule SQL statement
The AWS IoT Rules Engine uses a SQL-like statement to filter and transform MQTT messages before routing them to the configured action target.
Question 3: A DevOps team wants CloudWatch to alert when a connected sensor stops publishing data for more than 5 minutes. Which CloudWatch feature handles this?
- Composite alarm with suppressor alarm
- CloudWatch Logs Insights anomaly detection
- EventBridge scheduled rule with Lambda
- Missing Data treatment set to 'breaching' (Correct answer)
Correct answer: Missing Data treatment set to 'breaching'
Setting the missing data treatment to 'breaching' on a CloudWatch alarm causes it to transition to ALARM state when no data points arrive within the evaluation period.
Question 4: In a CodeBuild project, what is the correct buildspec field for specifying files that should be exported as output artifacts to S3?
- artifacts: files: (Correct answer)
- output: exports:
- cache: paths:
- phases: post_build: commands:
Correct answer: artifacts: files:
The 'artifacts' block in buildspec.yml, specifically the 'files' key, lists the files or directories CodeBuild packages and uploads as output artifacts.
Question 5: An AWS IoT Greengrass core device needs to process sensor data locally without internet connectivity. Which Greengrass component type runs the custom processing logic at the edge?
- IoT Device Defender component
- Lambda function component (Correct answer)
- CodeDeploy agent component
- CloudWatch agent component
Correct answer: Lambda function component
AWS IoT Greengrass supports Lambda function components that execute locally on the core device, enabling offline sensor data processing at the edge.
Question 6: When using SSM Parameter Store to supply configuration values, which SSM document syntax retrieves a SecureString parameter during a Run Command execution?
- aws:configurePackage with parameter ARN
- aws:downloadContent from S3
- aws:executeStateMachine with parameter path
- aws:runShellScript referencing {{ssm:parameter-name}} (Correct answer)
Correct answer: aws:runShellScript referencing {{ssm:parameter-name}}
SSM Run Command documents support the {{ssm:parameter-name}} syntax in aws:runShellScript actions to dynamically inject Parameter Store values at execution time.
Question 7: A sensor fleet publishes data to AWS IoT Core. A DevOps engineer wants to archive all raw telemetry to S3 with the least operational overhead. Which IoT rule action achieves this?
- Kinesis Firehose action with S3 destination
- S3 rule action writing directly to a designated bucket (Correct answer)
- SNS action triggering an SQS-to-S3 pipeline
- Lambda action that calls PutObject
Correct answer: S3 rule action writing directly to a designated bucket
The IoT Rules Engine S3 action directly writes matching messages to an S3 bucket with configurable key prefixes, requiring no intermediate services.
AWS DevOps I/O Configuration & Sensors 3
An AWS CodePipeline action produces output artifacts that must be consumed by a downstream stage.
Where are these artifacts stored by default?