AWS DevOps DevOps Automation Tools & Scripting Techniques 4

Question 1

A bash script running in CodeBuild needs to exit immediately when any command fails. Which bash option enables this behavior?

Accepted Answer

set -e

Answer

set -e causes the shell to exit immediately when any command returns a non-zero exit status, preventing silent failures from propagating.

Question 2

Which feature of AWS CodePipeline allows a pipeline to pause and wait for a human to review an artifact before proceeding to the next stage?

Accepted Answer

Approval action in the pipeline stage

Answer

A manual approval action pauses the pipeline and sends an optional SNS notification; the pipeline resumes only after an authorized reviewer approves or rejects.

Question 3

A team uses AWS SAM CLI to test a Lambda function locally before deploying. Which command invokes the function locally using a sample event JSON file?

Accepted Answer

sam local invoke -e event.json FunctionName

Answer

sam local invoke -e event.json FunctionName runs the specified Lambda function locally using the provided event JSON file for testing before deployment.

Question 4

In a CloudFormation template, a developer uses !Sub to construct an ARN string. Which syntax correctly substitutes the AWS account ID into a string?

Accepted Answer

!Sub 'arn:aws:s3:::${AWS::AccountId}-bucket'

Answer

!Sub uses ${AWS::AccountId} with the pseudo parameter AWS::AccountId to dynamically substitute the current account ID into the string.

Question 5

A Lambda function triggered by S3 events needs to process files only from a specific prefix path. Where is this filter configured?

Accepted Answer

In the S3 event notification filter rules with prefix and suffix conditions

Answer

S3 event notifications support filter rules on key prefix and suffix, so only objects matching the pattern trigger the Lambda function.

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AWS DevOps DevOps Automation Tools & Scripting Techniques 4