You Recently Encountered a Major Bug in Your Windows-Based Web

question 400

Multiple Choice

You recently encountered a major bug in your Windows-based web application during a deployment cycle. During this failed deployment, it took the team four hours to roll back to a previously working state, which left customers with a poor user experience. During the post-mortem, your team discussed the need to provide a quicker way to roll back failed deployments. You currently run your web application on Amazon EC2 using Windows 2012R2 and use Elastic Load Balancing for your load balancing needs. Which technique should you use to solve this problem?

• A) Create deployable versioned bundles of your application. Store the bundles on Amazon S3. Re-deploy your web application on Elastic Beanstalk, and enable the Elastic Beanstalk autorollback feature tied to CloudWatch metrics that define failure.
• B) Re-deploy your web application using an AWS OpsWorks stack, and use the AWS OpsWorks auto-rollback feature to initiate a rollback during failures.
• C) Create deployable versioned bundles of your application. Store the bundle on Amazon S3. Re-deploy your web application using an AWS OpsWorks stack, and use AWS OpsWorks application versioning to initiate a rollback during failures.
• D) Re-deploy your web application using Elastic Beanstalk, and use the Elastic Beanstalk application versions when deploying. During failures, re-deploy the previous version to the Elastic Beanstalk environment.
• E) Re-deploy your web application using Elastic Beanstalk, and use the Elastic Beanstalk API to trigger a FailedDeployment API call to initiate a rollback to the previous version.

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Definitions:

Capacitance Tester

A device used to measure the capacitance (the ability of a component to store an electric charge) of various electrical components.

CCA

Cold Cranking Amps; a rating used to describe a battery's ability to start an engine in cold temperatures.

Sealed Lead-Acid Battery

A type of rechargeable battery that uses lead peroxide and sponge lead, contained in a sealed unit to prevent leakage and reduce maintenance.

Carbon Pile Testing

A method for assessing the performance of an electrical component or system, such as a battery or alternator, by applying adjustable loads.