Master AWS CodeDeploy: 10 Interview Questions and Answers Explained

I can help you with the top 10 AWS CodeDeploy interview questions and answers.

1. Q: What is AWS CodeDeploy?
   A: AWS CodeDeploy is a fully managed deployment service that automates application deployments to various compute services, including Amazon EC2 instances, AWS Fargate, Lambda functions, and on-premises servers.

2. Q: What are the benefits of using AWS CodeDeploy?
   A: The benefits of using AWS CodeDeploy include:

   • Automated deployments with minimal downtime

   • Ability to roll back deployments in case of issues

   • Support for various deployment strategies

   • Easy integration with other AWS services

   • Centralized control and monitoring of deployments

3. Q: What deployment strategies does AWS CodeDeploy support?
   A: AWS CodeDeploy supports several deployment strategies, including:

   • In-place deployments: Replaces instances in an Auto Scaling group during deployment.

   • Blue/green deployments: Creates a new set of instances and switches traffic to the new environment.

   • AWS Lambda deployments: Directly deploys new versions of Lambda functions.

4. Q: How does CodeDeploy ensure minimal downtime during deployments?
   A: AWS CodeDeploy ensures minimal downtime by using features such as Auto Scaling groups and rolling deployments. It deploys application updates in small increments, allowing you to gradually shift traffic from the old version to the new one.

5. Q: How can you integrate CodeDeploy with other AWS services?
   A: AWS CodeDeploy can be integrated with other AWS services through various means, such as CloudFormation, AWS CLI, AWS SDKs, and AWS CodePipeline. These integrations allow for automated deployments as part of a CI/CD pipeline.

6. Q: What are the prerequisites for using AWS CodeDeploy?
   A: To use AWS CodeDeploy, you need the following prerequisites:

   • AWS IAM roles and permissions for CodeDeploy access

   • Application revision files stored in an S3 bucket or GitHub repository

   • Compute resources, such as EC2 instances or Lambda functions

7. Q: How can you roll back a failed deployment in CodeDeploy?
   A: In CodeDeploy, you can roll back a failed deployment by using the AWS Management Console, AWS CLI, or SDKs. By initiating a rollback, you can revert to the previous, known working version of your application.

8. Q: What is a deployment configuration in CodeDeploy?
   A: A deployment configuration in CodeDeploy defines the deployment rules and settings. It specifies parameters such as the deployment strategy, minimum healthy instances, and how traffic shifting should be performed during the deployment.

9. Q: How can you troubleshoot issues with CodeDeploy deployments?
   A: To troubleshoot CodeDeploy deployments, you can:

   • Review deployment logs in the AWS Management Console or CLI.

   • Use CloudWatch Logs to analyze application logs during deployments.

   • Monitor deployment metrics and alarms to identify issues.

   • Check the permissions and roles associated with CodeDeploy.

10. Q: Can you perform rolling deployments with AWS Lambda functions?
    A: No, rolling deployments are not applicable to AWS Lambda functions. Lambda deployments are instantaneous, and the new version of the function is immediately available. There is no need for traffic shifting or scaling.

Remember, these are sample questions and answers. It's always recommended to study the topic in-depth and understand the practical implementation of AWS CodeDeploy to perform well in an interview.