Here are 20 commonly asked AWS interview questions along with their answers:
- What is AWS?
AWS (Amazon Web Services) is a cloud computing platform provided by Amazon that offers a wide range of services to help individuals and businesses build and deploy applications and manage their infrastructure.
- What are the key components of AWS?
Some key components of AWS include Elastic Compute Cloud (EC2) for virtual servers, Simple Storage Service (S3) for object storage, Relational Database Service (RDS) for managed databases, and Identity and Access Management (IAM) for security management.
- What is S3 in AWS?
Amazon S3 (Simple Storage Service) is a scalable object storage service that allows users to store and retrieve data over the internet. It is highly durable, highly available, and offers low-latency access to data.
- What is EC2 in AWS?
Amazon EC2 (Elastic Compute Cloud) provides virtual servers in the cloud, allowing users to configure and deploy instances based on their specific requirements. EC2 offers scalability, flexibility, and pay-as-you-go pricing.
- What is an Amazon Machine Image (AMI)?
An Amazon Machine Image is a pre-configured template that contains the necessary information to launch an EC2 instance. It includes the operating system, software, and configuration settings required for the instance.
- What is Auto Scaling in AWS?
Auto Scaling is a feature that automatically adjusts the number of EC2 instances in an Auto Scaling group based on defined policies and conditions. It helps maintain application availability and optimize costs by scaling instances up or down as needed.
- What is a VPC in AWS?
A Virtual Private Cloud (VPC) is a logically isolated section of the AWS cloud where users can launch resources such as EC2 instances, RDS databases, and load balancers. It allows users to define their network topology, IP address ranges, and security settings.
- What is AWS Lambda?
AWS Lambda is a serverless computing service that lets you run code without provisioning or managing servers. It executes code in response to events and automatically scales to handle the workload.
- What is DynamoDB?
DynamoDB is a fully managed NoSQL database service provided by AWS. It offers high scalability, low latency, and automatic scaling. DynamoDB is suitable for applications that require fast and predictable performance.
- What is CloudFormation?
AWS CloudFormation is a service that allows users to define and deploy their AWS infrastructure as code using templates. It helps automate the provisioning and management of resources, making it easier to manage complex environments.
- What is the difference between S3 and EBS?
Amazon S3 is an object storage service designed for storing and retrieving large amounts of unstructured data, such as files and backups. Amazon EBS (Elastic Block Store) is a block-level storage service primarily used for attaching persistent storage volumes to EC2 instances.
- What is the difference between a region and an Availability Zone (AZ)?
An AWS region is a physical location in the world where AWS has multiple data centers. Each region is designed to be isolated from other regions. Availability Zones (AZs) are distinct locations within a region that are engineered to be independent and fault-tolerant.
- What is the AWS Shared Responsibility Model?
The AWS Shared Responsibility Model defines the division of responsibilities between AWS and the customer. AWS is responsible for the security of the cloud infrastructure, while the customer is responsible for the security of the applications and data they run on AWS.
- What is the purpose of Amazon CloudWatch?
Amazon CloudWatch is a monitoring and observability service that provides insights into the performance and health of AWS resources and applications.
- How will you configure an Amazon S3 bucket to serve static assets for your public web application?
To configure an Amazon S3 bucket to serve static assets for a public web application, you need to follow these three steps:
- Create an S3 bucket and enable it for static website hosting.
- Upload your static assets (HTML, CSS, JavaScript, images, etc.) to the bucket.
- Set the bucket’s permissions to allow public access to the objects, and configure the bucket as a static website endpoint URL for your application.
- If you launched a standby RDS, will it be launched in the same availability zone as your primary?
By default, when you launch a standby RDS instance, it will be launched in a different availability zone than your primary instance for high availability and fault tolerance. Launching the standby instance in a different availability zone ensures that your database remains available even if there is a failure in the primary availability zone.
- Which service provided by AWS can you use to transfer objects from your data center, when you are using Amazon CloudFront?
When using Amazon CloudFront, you can use the Amazon S3 service provided by AWS to transfer objects from your data center. By storing your objects in an S3 bucket, you can seamlessly integrate it with CloudFront for efficient content delivery and caching.
- What is EC2?
EC2 (Elastic Compute Cloud) is a core service provided by AWS that offers resizable virtual servers in the cloud. It allows users to quickly provision and scale instances based on their computing requirements. EC2 instances provide the flexibility to run a wide range of applications and services on the AWS cloud infrastructure.
- What is a Snowball?
Snowball is a physical data transfer service provided by AWS. It enables the secure and efficient transfer of large amounts of data between on-premises environments and the AWS cloud. Snowball devices are rugged and portable storage appliances that can be used to import or export data in a secure manner, even in offline scenarios.
- What is CloudWatch?
CloudWatch is a monitoring and observability service offered by AWS. It allows users to collect and track metrics, log files, and set alarms for various AWS resources and applications. CloudWatch provides insights into system performance, resource utilization, and application health to help optimize operations and ensure high availability.
