AWS Interview questions and answers - 2023

AWS Interview Questions and Answers!

(AWS Solution Architect, AWS SysOps, and AWS DevOps)  

AWS Solution Architect interview questions and answers!

1.       What is AWS and what services does it provide?

AWS (Amazon Web Services) is a cloud platform that provides a variety of services including compute, storage, database, networking, security, and more.

2.       What is the difference between S3 and EBS?

S3 (Simple Storage Service) is an object storage service, while EBS (Elastic Block Store) is a block storage service. S3 is used for storing and retrieving large objects or files, while EBS is used for storing persistent data that requires low-latency access.

3.       What is an EC2 instance?

EC2 (Elastic Compute Cloud) is a web service that provides resizable compute capacity in the cloud. An EC2 instance is a virtual machine that runs on the EC2 service.

4.       What is the difference between a public and a private subnet?

A public subnet is a subnet that has a direct route to the internet, while a private subnet does not. Instances in a private subnet can access the internet through a NAT gateway or instance.

5.       What is an Elastic IP address?

An Elastic IP address is a static, public IPv4 address that can be associated with an EC2 instance. It can be moved between instances in the same AWS region.

6.       What is CloudFormation?

CloudFormation is a service that allows you to define and deploy infrastructure as code using templates. It makes it easier to provision and manage resources in a repeatable way.

7.       What is IAM and what is it used for?

IAM (Identity and Access Management) is a service that allows you to manage user access to AWS resources. It is used for controlling permissions and authentication across AWS services.

8.       What is an SNS topic?

An SNS (Simple Notification Service) topic is a communication channel that allows you to send messages to multiple subscribers or endpoints. It can be used to send notifications or alerts across different AWS services.

9.       What is CloudFront?

CloudFront is a content delivery network (CDN) that allows you to distribute content to users around the world. It caches content at edge locations to improve performance and reduce latency.

10.   What is RDS?

RDS (Relational Database Service) is a service that allows you to run relational databases in the cloud. It supports a variety of database engines, including MySQL, PostgreSQL, and Oracle.

11.   What is a VPC?

A VPC (Virtual Private Cloud) is a virtual network in AWS that allows you to launch resources in a logically isolated section of the AWS cloud. It provides control over network configuration, such as IP addresses, subnets, and routing tables, and allows for secure communication between resources.

12.   What is the difference between RDS and DynamoDB?

RDS is a relational database service that supports structured data, while DynamoDB is a NoSQL database service that supports semi-structured and unstructured data. RDS provides more control over database configuration, while DynamoDB is more scalable and provides automatic scaling.

13.   What is a load balancer?

A load balancer is a service that distributes incoming traffic across multiple instances or resources to improve availability and scalability. It can be used to balance traffic across multiple availability zones or regions to improve fault tolerance and reduce latency.

14.   What is a Lambda function?

A Lambda function is a serverless function that can be used to execute code in response to an event. It allows you to run code without provisioning or managing servers, and can be used for a variety of use cases, including data processing, image and video processing, and web applications.

15.   What is CloudTrail?

CloudTrail is a service that provides audit logs of AWS account activity. It allows you to monitor API calls and changes to AWS resources

 

AWS SysOps interview questions and answers

1.       What is AWS and what services does it provide?

AWS (Amazon Web Services) is a cloud platform that provides a variety of services including compute, storage, database, networking, security, and more.

2.       What is CloudWatch and what can it be used for?

CloudWatch is a service that provides monitoring and management of AWS resources. It can be used to collect and track metrics, collect and monitor log files, and set alarms.

3.       What is an S3 bucket and how is it different from EBS?

S3 (Simple Storage Service) is an object storage service, while EBS (Elastic Block Store) is a block storage service. An S3 bucket is a container for storing objects or files in the cloud, while EBS is used for storing persistent data that requires low-latency access.

4.       What is Auto Scaling and how does it work?

Auto Scaling is a service that automatically scales EC2 instances up or down based on demand. It works by monitoring the usage of EC2 instances and adjusting the number of instances in response to changes in demand.

5.       What is Route 53 and what can it be used for?

Route 53 is a DNS service that allows you to manage domain names and route internet traffic to AWS resources. It can be used for domain registration, DNS management, and routing of internet traffic to AWS resources.

6.       What is an EIP and how is it used?

An EIP (Elastic IP address) is a static, public IPv4 address that can be associated with an EC2 instance. It can be moved between instances in the same AWS region and can be used for static IPs for AWS resources.

7.       What is an AMI and how is it used?

An AMI (Amazon Machine Image) is a pre-configured virtual machine image that is used to create EC2 instances. It contains the information required to launch an instance, including the operating system, application server, and applications.

8.       What is an IAM policy and how is it used?

An IAM (Identity and Access Management) policy is a document that defines permissions for AWS resources. It can be used to control access to AWS services and resources and define what actions users and services can perform.

9.       What is CloudFormation and how is it used?

CloudFormation is a service that allows you to define and deploy infrastructure as code using templates. It makes it easier to provision and manage resources in a repeatable way.

10.   What is an EBS volume and how is it used?

An EBS (Elastic Block Store) volume is a block-level storage device that can be attached to an EC2 instance. It can be used to store persistent data that requires low-latency access.

11.   What is the difference between a security group and a network ACL?

A security group is a virtual firewall that controls access to EC2 instances, while a network ACL is a virtual firewall that controls access to subnets. Security groups operate at the instance level, while network ACLs operate at the subnet level.

12.   What is the difference between an on-demand instance and a reserved instance?

An on-demand instance is an EC2 instance that is charged by the hour with no upfront cost, while a reserved instance is a discounted EC2 instance that requires an upfront payment and is charged at a lower hourly rate.

13.   What is CloudTrail and what can it be used for?

CloudTrail is a service that provides audit logs of AWS account activity. It allows you to monitor API calls and changes to AWS resources.

14.   What is the difference between CloudFront and Route 53?

CloudFront is a content delivery network (CDN) that allows you to distribute content to users around the world.

 

AWS DevOps interview questions and answers!

1.       What is DevOps and how does it work with AWS?

DevOps is a methodology that emphasizes collaboration and automation between development and operations teams. AWS provides a suite of services that can be used to automate the deployment and management of applications and infrastructure in the cloud.

2.       What is CodePipeline and how is it used?

CodePipeline is a service that provides continuous delivery and release automation. It can be used to build, test, and deploy code changes using a variety of AWS and third-party tools.

3.       What is CodeCommit and how is it used?

CodeCommit is a source control service that provides Git-based repositories for storing and managing code. It can be used to host private Git repositories and integrate with other AWS services.

4.       What is CodeBuild and how is it used?

CodeBuild is a service that provides build environments for building and testing code. It can be used to build and test code in the cloud using a variety of languages and frameworks.

5.       What is CodeDeploy and how is it used?

CodeDeploy is a service that provides automated deployment and rollback of code changes. It can be used to deploy code changes to EC2 instances, Lambda functions, and other AWS resources.

6.       What is CloudFormation and how is it used in DevOps?

CloudFormation is a service that allows you to define and deploy infrastructure as code using templates. It can be used to automate the provisioning and management of AWS resources in a repeatable way.

7.       What is Elastic Beanstalk and how is it used?

Elastic Beanstalk is a service that simplifies the deployment and management of applications in the cloud. It can be used to deploy web applications and services using a variety of programming languages and frameworks.

8.       What is the difference between a container and a virtual machine?

A container is a lightweight, portable unit of software that includes everything needed to run an application, while a virtual machine is a full-blown computer that runs an operating system and includes everything needed to run an application.

9.       What is Docker and how is it used in DevOps?

Docker is a containerization platform that provides a way to package and run applications in containers. It can be used to create consistent and repeatable environments for running applications in the cloud.

10.   What is AWS Lambda and how is it used in DevOps?

AWS Lambda is a serverless compute service that allows you to run code without provisioning or managing servers. It can be used to build event-driven applications and automate tasks in the cloud.

11.   What is an EC2 instance and how is it used in DevOps?

An EC2 instance is a virtual machine that can be used to run applications and services in the cloud. It can be provisioned and managed using a variety of AWS services.

12.   What is an ALB and how is it used in DevOps?

An ALB (Application Load Balancer) is a service that distributes incoming traffic across multiple targets. It can be used to improve the availability and scalability of applications in the cloud.

13.   What is CloudWatch and how is it used in DevOps?

CloudWatch is a service that provides monitoring and management of AWS resources. It can be used to collect and track metrics, collect and monitor log files, and set alarms.

14.   What is an S3 bucket and how is it used in DevOps?

An S3 (Simple Storage Service) bucket is a container for storing objects or files in the cloud. It can be used to store artifacts, logs, and other data used in the deployment and management of applications in the cloud.