Introduction
In the ever-evolving landscape of cloud computing, mastering the intricacies of Amazon Web Services (AWS) is essential for professionals aiming to excel in the field. Interviews for AWS positions often probe candidates' knowledge of various services, tools, and best practices. Let's explore some common AWS interview questions and dive into their answers.
Name 5 AWS Services and Their Use Cases:
Amazon S3 (Simple Storage Service): Ideal for storing and retrieving any amount of data.
Amazon EC2 (Elastic Compute Cloud): Provides scalable computing capacity in the cloud.
AWS Lambda: Enables serverless computing for running code without provisioning or managing servers.
Amazon RDS (Relational Database Service): Simplifies database setup, operation, and scaling.
Amazon VPC (Virtual Private Cloud): Offers a logically isolated section of the AWS Cloud where you can launch AWS resources.
Tools for Sending Logs to the Cloud Environment:
AWS CloudWatch: Monitors, logs, and reacts to changes in your AWS resources.
AWS CloudTrail: Records AWS API calls for your account and delivers log files.
IAM Roles: Creation and Management: IAM (Identity and Access Management) roles are created and managed through the AWS Management Console or AWS Command Line Interface (CLI). Roles grant permissions to AWS resources securely without the need for long-term access keys.
Upgrading/Downgrading Systems with Zero Downtime: Use techniques like Blue-Green Deployment or canary releases, where the new version is gradually rolled out, ensuring minimal impact on users.
Infrastructure as Code (IaC): IaC involves managing and provisioning infrastructure through machine-readable script files rather than physical hardware configuration. Tools like AWS CloudFormation and Terraform enable the automation of infrastructure deployment.
Load Balancer and Scenarios:
Classic Load Balancer: Distributes incoming traffic across multiple Amazon EC2 instances.
Application Load Balancer: Best for routing HTTP/HTTPS traffic and provides advanced features.
Network Load Balancer: Handles TCP, UDP, and TLS traffic with high performance.
CloudFormation and Elastic Beanstalk:
AWS CloudFormation: A service for creating and managing AWS infrastructure as code.
AWS Elastic Beanstalk: Simplifies the deployment of applications, automatically handling capacity provisioning, load balancing, and more.
Cloud Security Attacks and Minimization:
Attacks: DDoS attacks, data breaches, insecure APIs.
Minimization: Use strong IAM policies, encryption, and regularly update security groups and network ACLs.
Recovering EC2 Instances without Key: Yes, you can recover an EC2 instance without the key by stopping the instance, detaching the root volume, attaching it to another instance, modifying the authorized_keys file, and reattaching the volume.
Gateway: A gateway is a network node that connects two different networks, facilitating communication between them. In AWS, this could refer to services like API Gateway or VPN Gateway.
Difference Between Amazon RDS, DynamoDB, and Redshift:
RDS: Managed relational database service.
DynamoDB: Fully managed NoSQL database service.
Redshift: Fully managed data warehouse service.
Hosting a Website on S3: Yes or No? Why?
Yes: S3 is ideal for static website hosting due to its simplicity, scalability, and cost-effectiveness.
No: For dynamic or database-driven websites, a combination of services like EC2, Elastic Beanstalk, or ECS may be more suitable.
Conclusion
Mastering these AWS interview questions not only showcases your proficiency but also highlights your ability to navigate the complexities of cloud infrastructure. As the demand for AWS expertise continues to rise, being well-versed in these topics will undoubtedly set you apart in the competitive landscape of cloud computing.