AWS Developer Interview Questions
Amazon Web Services (AWS) has established itself as a leading cloud solutions provider, underpinning countless applications and digital infrastructures globally. As organizations migrate and innovate on this platform, securing adept AWS developers is paramount. The ensuing guide comprises 25 questions meticulously crafted to probe a candidate's proficiency in AWS architectures, service integrations, and scalability solutions. Employing these insights during interviews will aid businesses in identifying developers well-versed in harnessing the full spectrum of AWS offerings.
Explain the significance of IAM in AWS.
Answer: IAM (Identity and Access Management) is a web service that helps manage users and user permissions in AWS, ensuring the right individuals have the correct access to resources.
What is an Amazon VPC?
Answer: Amazon VPC (Virtual Private Cloud) allows provisioning of a private, isolated section of the AWS Cloud where one can launch AWS resources in a defined virtual network.
How do you ensure high availability and fault tolerance in AWS?
Answer: I utilize services like Amazon RDS Multi-AZ deployments, Elastic Load Balancing, and AWS Auto Scaling, along with distributed architectures across multiple regions and availability zones.
Describe the AWS shared responsibility model.
Answer: AWS is responsible for the security "of" the cloud (infrastructure, hardware, software). Customers are responsible for security "in" the cloud (data, applications, and user access).
How do you manage stateful applications in AWS?
Answer: I utilize services like Amazon Elastic File System (EFS) or Amazon RDS to manage and store application state and data.
What is AWS Lambda?
Answer: AWS Lambda is a serverless compute service that runs code in response to events, automatically managing compute resources.
Explain the concept of auto-scaling in AWS.
Answer: AWS Auto Scaling monitors applications and adjusts capacity to maintain steady, predictable performance at the lowest possible cost.
How do you handle data migration to AWS?
Answer: I use tools like AWS Data Migration Service, AWS Snowball, and the AWS Transfer Family to migrate databases, data warehouses, and data to AWS.
What is Amazon CloudFront?
Answer: Amazon CloudFront is a content delivery network (CDN) that distributes content globally with low latency.
How do you approach cost optimization in AWS?
Answer: I utilize the AWS Cost Explorer, AWS Budgets, and the AWS Trusted Advisor to monitor costs and optimize resources.
What is AWS SAM?
Answer: AWS SAM (Serverless Application Model) is a framework for building serverless applications on AWS.
Describe AWS Step Functions.
Answer: AWS Step Functions coordinate multiple AWS services into serverless workflows so applications can be built and updated quickly.
How do you ensure data security in AWS?
Answer: I implement encryption (both in-transit and at-rest), utilize AWS Key Management Service, enforce IAM policies, and regularly audit using AWS CloudTrail.
What is Amazon Redshift?
Answer: Amazon Redshift is a fully-managed petabyte-scale data warehouse service in the cloud.
How do you monitor applications in AWS?
Answer: I utilize Amazon CloudWatch to monitor applications, collecting and tracking metrics, and set up alarms.
Describe AWS Elastic Beanstalk.
Answer: AWS Elastic Beanstalk is a service for deploying and scaling web applications and services with popular programming languages.
What's the difference between Amazon RDS and Amazon DynamoDB?
Answer: Amazon RDS is a relational database service, while Amazon DynamoDB is a NoSQL database service.
How do you handle disaster recovery in AWS?
Answer: I use AWS services like S3 versioning, AWS Backup, and cross-region replication, and frequently test recovery scenarios.
What are AWS Security Groups?
Answer: Security Groups are virtual firewalls for EC2 instances to control inbound and outbound traffic.
Describe the purpose of AWS CloudFormation.
Answer: AWS CloudFormation provides a common language to describe and provision AWS resources and set of infrastructure as code.
How do you manage configurations in AWS?
Answer: I utilize AWS Systems Manager Parameter Store to manage configuration data and secrets.
What are AWS Spot Instances?
Answer: AWS Spot Instances are unused EC2 instances available at up to 90% discount compared to On-Demand prices.
Describe AWS Direct Connect.
Answer: AWS Direct Connect is a network service that provides a dedicated connection from on-premises to AWS, bypassing the public internet.
How do you deploy microservices on AWS?
Answer: I typically use Amazon ECS or AWS EKS for containerized microservices, leveraging services like AWS Fargate for serverless deployment.
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