Your company relies heavily on AWS for its critical services. How would you design a disaster recovery plan to ensure high availability and data integrity?
Answer: I would implement a multi-region architecture using AWS services like Route 53 for DNS failover, AWS Global Accelerator for traffic routing, and AWS S3 for cross-region replication of critical data. I would also set up automated backups using AWS RDS for databases and implement AWS CloudFormation for infrastructure as code to facilitate easy replication of resources across regions.
The company has seen an increase in AWS costs. How would you go about identifying cost-saving opportunities while maintaining service quality?
Answer: I would start by using AWS Cost Explorer to analyze cost trends and identify areas of high spending. I would then look for unused or underutilized resources and consider rightsizing or terminating them. Additionally, I would explore options like Reserved Instances, Spot Instances, and AWS Lambda for serverless workloads to optimize costs further.
Your application experiences a sudden spike in traffic. How would you ensure it scales seamlessly without downtime?
Answer: I would utilize AWS Auto Scaling to dynamically adjust the number of EC2 instances based on traffic patterns. Additionally, I would leverage services like AWS Elastic Load Balancer to distribute traffic evenly and Amazon CloudFront for content delivery. AWS Lambda and Amazon RDS read replicas can also be used to handle increased read traffic.
Your company is concerned about the security of sensitive data stored on AWS. How would you secure this data?
Answer: I would implement a combination of AWS Identity and Access Management (IAM) for access control, AWS Key Management Service (KMS) for encryption, and AWS CloudTrail for auditing. Additionally, I would ensure that data at rest is encrypted using services like AWS S3 SSE and enable SSL for data in transit.
The company wants to implement a continuous deployment pipeline on AWS. How would you go about setting up this pipeline?
Answer: I would use AWS CodePipeline for orchestrating the pipeline, AWS CodeCommit for version control, AWS CodeBuild for building and testing, and AWS Elastic Beanstalk or AWS ECS for deployment. This setup ensures automated, consistent, and reliable deployments.