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Top 100 Cloud Engineer Interview Questions and Answers

Top 100 Cloud Engineer Interview Questions and Answers

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1. What is AWS?

Amazon Web Services (AWS) is a comprehensive and widely adopted cloud platform offered by Amazon. It provides a wide range of cloud computing services, including computing power, storage options, networking capabilities, databases, machine learning, analytics, and more.


2. What is a Virtual Machine (EC2) in AWS?

Amazon Elastic Compute Cloud (EC2) is a web service offered by AWS that provides resizable compute capacity in the cloud. It allows users to run virtual machines, known as instances, with different configurations and operating systems.


3. What is an AWS Region?

An AWS Region is a physical location in the world where AWS has data centers. Each AWS Region is made up of multiple Availability Zones, which are essentially data centers with redundant power, networking, and cooling.


4. What is an AWS Availability Zone?

An AWS Availability Zone is one or more discrete data centers with redundant power, networking, and cooling. They are separate from each other to ensure fault isolation. Applications can be designed to run in multiple Availability Zones to achieve high availability and fault tolerance.


5. Explain AWS S3.

Amazon Simple Storage Service (S3) is an object storage service that offers industry-leading scalability, data availability, security, and performance. It’s designed to store and retrieve any amount of data from anywhere on the web.


6. What is AWS Lambda?

AWS Lambda is a serverless computing service that lets you run code without provisioning or managing servers. It automatically scales and manages the underlying resources required to run your code.


7. Explain AWS IAM.

AWS Identity and Access Management (IAM) is a web service that helps you securely control access to AWS resources. It allows you to create and manage users and groups and use permissions to allow and deny their access to AWS resources.


8. What is the purpose of a Bastion Host in AWS?

A Bastion Host, also known as a jump server, is a special-purpose instance that is placed on the public subnet of your VPC. It provides secure access to resources in private subnets.

# Example: Creating a Bastion Host in AWS using AWS CLI
aws ec2 create-instance --image-id ami-0c94855ba95c71c99 --count 1 --instance-type t2.micro --key-name my-key-pair --subnet-id subnet-057fa32707d293d9b --security-group-ids sg-0123456789abcdef0 --associate-public-ip-address

9. What is a Lambda function in AWS?

AWS Lambda is a serverless compute service that lets you run code without provisioning or managing servers. It automatically scales and manages the underlying compute resources.

# Example: Simple Python Lambda function
def lambda_handler(event, context):
    return {
        'statusCode': 200,
        'body': 'Hello from Lambda!'
    }

10. Explain the concept of IAM in AWS.

IAM (Identity and Access Management) in AWS allows you to manage users, groups, and roles to control access to AWS services and resources.

# Example: Creating an IAM user using AWS CLI
aws iam create-user --user-name my-user

11. What is CloudWatch in AWS?

Amazon CloudWatch is a monitoring service for AWS resources and the applications you run on the cloud platform. It collects and tracks metrics, collects and monitors log files, and sets alarms.

# Example: Creating a CloudWatch alarm using AWS CLI
aws cloudwatch put-metric-alarm --alarm-name my-alarm --alarm-description "This metric checks CPU utilization" --metric-name CPUUtilization --namespace AWS/EC2 --statistic Average --period 60 --threshold 90 --comparison-operator GreaterThanThreshold --evaluation-periods 1 --unit Percent --alarm-actions arn:aws:sns:us-east-1:123456789012:my-sns-topic

12. What is AWS CloudFormation?

AWS CloudFormation provides a common language for you to describe and provision all the infrastructure resources in your cloud environment.

# Example: CloudFormation template for an S3 bucket
Resources:
  MyBucket:
    Type: "AWS::S3::Bucket"
    Properties: 
      BucketName: "my-bucket-name"

13. Explain the concept of a CDN (Content Delivery Network).

A Content Delivery Network (CDN) is a system of distributed servers that work together to deliver web content, such as images, videos, and scripts, to users based on their geographic location.

# Example: Setting up a CDN in AWS CloudFront
Resources:
  MyDistribution:
    Type: "AWS::CloudFront::Distribution"
    Properties:
      DistributionConfig:
        DefaultCacheBehavior:
          TargetOriginId: myS3Origin
          ForwardedValues:
            QueryString: 'false'

14. What is an Auto Scaling Group in AWS?

An Auto Scaling Group is a collection of Amazon EC2 instances that are created from a common Amazon Machine Image (AMI). It automatically adjusts the number of instances in response to changes in demand.

# Example: Creating an Auto Scaling Group using AWS CLI
aws autoscaling create-auto-scaling-group --auto-scaling-group-name my-asg --launch-configuration-name my-launch-config --min-size 1 --max-size 5 --desired-capacity 3 --availability-zones us-west-2a us-west-2b

15. Explain the concept of S3 in AWS.

Amazon Simple Storage Service (Amazon S3) is an object storage service that offers industry-leading scalability, data availability, security, and performance.

# Example: Creating an S3 bucket using AWS CLI
aws s3api create-bucket --bucket my-bucket-name --region us-west-2

16. What is a VPC in AWS?

Amazon Virtual Private Cloud (Amazon VPC) enables you to launch Amazon Web Services resources into a virtual network that you’ve defined.

# Example: Creating a VPC using AWS CLI
aws ec2 create-vpc --cidr-block 10.0.0.0/16

17. Explain the concept of RDS in AWS.

Amazon RDS (Relational Database Service) is a managed relational database service that provides scalable and cost-effective databases.

# Example: Creating an RDS instance using AWS CLI
aws rds create-db-instance --db-instance-identifier mydbinstance --db-instance-class db.t2.micro --engine MySQL --master-username mymasteruser --master-user-password mymasterpassword --allocated-storage 20 --availability-zone us-west-2a --vpc-security-group-ids sg-0123456789abcdef0 --db-subnet-group-name mydbsubnetgroup

18. What is an Elastic Load Balancer (ELB) in AWS?

Amazon Elastic Load Balancer (Amazon ELB) is an AWS service that automatically distributes incoming application traffic across multiple targets, such as EC2 instances, containers, and IP addresses, in one or more Availability Zones.

# Example: Creating an ELB using AWS CLI
aws elbv2 create-load-balancer --name my-load-balancer --subnets subnet-0123456789abcdef0 subnet-0123456789abcdef1 --security-groups sg-0123456789abcdef0

19. Explain the concept of Route 53 in AWS.

Amazon Route 53 is a scalable domain name system (DNS) web service designed to provide highly reliable and cost-effective domain registration, DNS routing, and health checking of resources within your environment.

# Example: Creating a hosted zone using AWS CLI
aws route53 create-hosted-zone --name mydomain.com --caller-reference 1

20. What is AWS Lambda Layers?

AWS Lambda Layers are a distribution mechanism for libraries, custom runtimes, or other function dependencies. Layers let you manage your in-development function code independently from the unchanging code and resources that it uses.

# Example: Creating a Lambda Layer using AWS CLI
aws lambda publish-layer-version --layer-name my-layer --description "My Layer" --zip-file fileb://my-layer.zip --compatible-runtimes nodejs14.x

21. Explain the concept of Elastic Beanstalk in AWS.

AWS Elastic Beanstalk is an easy-to-use service for deploying and scaling web applications and services. It automatically handles the deployment, from capacity provisioning and load balancing to application health monitoring.

# Example: Creating an Elastic Beanstalk environment using AWS CLI
aws elasticbeanstalk create-environment --application-name my-app --environment-name my-env --solution-stack-name "64bit Amazon Linux 2018.03 v2.14.0 running Tomcat 8.5 Corretto 8" --option-settings Namespace=aws:autoscaling:launchconfiguration,OptionName=IamInstanceProfile,Value=my-instance-profile

22. What is AWS CloudFormation?

AWS CloudFormation is a service that helps you model and set up your Amazon Web Services resources so that you can spend less time managing those resources and more time focusing on your applications.

# Example: Creating a CloudFormation stack using AWS CLI
aws cloudformation create-stack --stack-name my-stack --template-body file://my-template.json --parameters ParameterKey=KeyPairName,ParameterValue=my-key

23. Explain the concept of IAM in AWS.

Identity and Access Management (IAM) is a web service for securely controlling access to AWS services and resources. It provides fine-grained access control and helps you manage users, groups, and permissions.

# Example: Creating an IAM user using AWS CLI
aws iam create-user --user-name my-user

24. What is AWS SNS?

Amazon Simple Notification Service (SNS) is a fully managed messaging service that enables you to decouple microservices, distributed systems, and serverless applications.

# Example: Creating an SNS topic using AWS CLI
aws sns create-topic --name my-topic

25. Explain the concept of CloudWatch in AWS.

Amazon CloudWatch is a monitoring service for AWS resources and the applications you run on the cloud platform. You can use Amazon CloudWatch to collect and track metrics, collect and monitor log files, and set alarms.

# Example: Creating a CloudWatch alarm using AWS CLI
aws cloudwatch put-metric-alarm --alarm-name my-alarm --alarm-description "This metric checks the status of my resource" --metric-name CPUUtilization --namespace AWS/EC2 --statistic Average --period 300 --threshold 80 --comparison-operator GreaterThanOrEqualToThreshold --evaluation-periods 2 --alarm-actions arn:aws:sns:us-east-1:111122223333:my-topic --unit Percent

26. What is AWS KMS?

AWS Key Management Service (KMS) is a managed encryption service that allows you to create and control the encryption keys used to encrypt your data.

# Example: Creating a KMS key using AWS CLI
aws kms create-key --description "My encryption key"

27. Explain the concept of AWS ECS.

Amazon Elastic Container Service (ECS) is a fully-managed container orchestration service that makes it easy to run, stop, and manage Docker containers on a cluster.

# Example: Creating an ECS cluster using AWS CLI
aws ecs create-cluster --cluster-name my-cluster

28. What is AWS Step Functions?

AWS Step Functions is a serverless orchestration service that lets you coordinate distributed applications and microservices using visual workflows.

# Example: Creating a Step Function using AWS CLI
aws stepfunctions create-state-machine --name my-state-machine --definition file://my-definition.json --role-arn arn:aws:iam::111122223333:role/service-role/MyRole

29. Explain the concept of AWS CloudTrail.

AWS CloudTrail is a service that enables governance, compliance, operational auditing, and risk auditing of your AWS account.

# Example: Creating a CloudTrail trail using AWS CLI
aws cloudtrail create-trail --name my-trail --s3-bucket-name my-s3-bucket

30. What is AWS Glue?

AWS Glue is a fully managed extract, transform, and load (ETL) service that makes it easy for users to prepare and load their data for analytics.

# Example: Creating a Glue job using AWS CLI
aws glue create-job --name my-job --role arn:aws:iam::111122223333:role/MyRole --command Name=glueetl,ScriptLocation=s3://my-bucket/my-script.py

31. Explain what AWS Elastic Beanstalk is.

AWS Elastic Beanstalk is a Platform as a Service (PaaS) offering from AWS that simplifies the deployment and management of applications. It automatically handles infrastructure provisioning, load balancing, scaling, and application health monitoring.

# Example: Creating an Elastic Beanstalk application using AWS CLI
aws elasticbeanstalk create-application --application-name my-app

32. What is Amazon RDS?

Amazon Relational Database Service (RDS) is a managed database service that simplifies the setup, operation, and scaling of relational databases. It supports various database engines like MySQL, PostgreSQL, SQL Server, and more.

# Example: Creating an RDS database instance using AWS CLI
aws rds create-db-instance --db-instance-identifier mydbinstance --db-instance-class db.t2.micro --engine MySQL --allocated-storage 20 --master-username mymasteruser --master-user-password mymasterpassword

33. Explain the concept of AWS VPC (Virtual Private Cloud).

Amazon Virtual Private Cloud (VPC) lets you provision a logically isolated section of the AWS Cloud where you can launch AWS resources in a virtual network that you’ve defined.

# Example: Creating a VPC using AWS CLI
aws ec2 create-vpc --cidr-block 10.0.0.0/16

34. What is AWS Lambda?

AWS Lambda is a serverless compute service that allows you to run code without provisioning or managing servers. It’s often used for event-driven applications and can be triggered by various AWS services.

# Example: Creating a Lambda function using AWS CLI
aws lambda create-function --function-name my-function --runtime nodejs14.x --role arn:aws:iam::111122223333:role/service-role/my-execution-role --handler index.handler --code S3Bucket=my-bucket,S3Key=my-code.zip

35. What is AWS S3?

Amazon Simple Storage Service (S3) is an object storage service that offers industry-leading scalability, data availability, security, and performance.

# Example: Creating an S3 bucket using AWS CLI
aws s3api create-bucket --bucket my-bucket-name

36. Explain what an AWS Security Group is.

An AWS Security Group acts as a virtual firewall for your Amazon Elastic Compute Cloud (EC2) instances to control inbound and outbound traffic.

# Example: Creating a security group using AWS CLI
aws ec2 create-security-group --group-name my-security-group --description "My security group" --vpc-id vpc-12345678

37. What is AWS CloudFront?

Amazon CloudFront is a content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to customers globally with low latency and high transfer speeds.

# Example: Creating a CloudFront distribution using AWS CLI
aws cloudfront create-distribution --distribution-config file://my-distribution-config.json

38. Explain what an AWS IAM role is.

An AWS Identity and Access Management (IAM) role is similar to a user but is intended for services to assume. It defines what actions are allowed or denied and what AWS resources the role can access.

# Example: Creating an IAM role using AWS CLI
aws iam create-role --role-name my-role --assume-role-policy-document file://my-policy.json

39. What is Amazon EBS (Elastic Block Store)?

Amazon Elastic Block Store is a block storage service that you can use with Amazon EC2 instances. It provides scalable and high-performance block storage for your applications.

# Example: Creating an EBS volume using AWS CLI
aws ec2 create-volume --availability-zone us-east-1a --size 20

40. Explain the concept of AWS Auto Scaling.

AWS Auto Scaling allows you to automatically adjust the capacity of your EC2 instances to maintain application availability and optimize cost.

# Example: Creating an Auto Scaling group using AWS CLI
aws autoscaling create-auto-scaling-group --auto-scaling-group-name my-asg --launch-configuration-name my-launch-config --min-size 2 --max-size 5 --desired-capacity 3 --availability-zones us-east-1a,us-east-1b

41. What is AWS CloudFormation?

AWS CloudFormation is an infrastructure as code (IAC) service that allows you to define and provision AWS infrastructure in a safe, predictable, and repeatable manner. It uses templates written in YAML or JSON to describe the architecture and resources needed.

# Example: Creating a stack using AWS CLI
aws cloudformation create-stack --stack-name my-stack --template-body file://my-template.yaml --parameters ParameterKey=InstanceType,ParameterValue=t2.micro

42. Explain what Amazon ECS (Elastic Container Service) is.

Amazon ECS is a fully-managed container orchestration service that allows you to easily run, stop, and manage Docker containers on a cluster of Amazon EC2 instances.

# Example: Creating a task definition in ECS using AWS CLI
aws ecs register-task-definition --family my-task-family --container-definitions file://my-container-definition.json

43. What is AWS Route 53?

Amazon Route 53 is a scalable domain name system (DNS) web service designed to provide highly reliable and cost-effective domain registration, DNS routing, and health checking of resources within your AWS infrastructure.

# Example: Registering a domain using AWS CLI
aws route53domains register-domain --domain-name example.com --duration-in-years 1 --auto-renew

44. Explain the concept of AWS Lambda Layers.

AWS Lambda Layers allow you to manage your in-development function code independently from the unchanging code and resources that it uses. This can help you optimize resource sharing among multiple functions.

# Example: Publishing a layer using AWS CLI
aws lambda publish-layer-version --layer-name my-layer --description "My custom layer" --zip-file fileb://my-layer.zip

45. What is Amazon SNS?

Amazon Simple Notification Service (SNS) is a fully managed messaging service that allows you to send messages, notifications, and alerts to distributed systems and microservices.

# Example: Creating a topic in SNS using AWS CLI
aws sns create-topic --name my-topic

46. Explain what AWS KMS (Key Management Service) is.

AWS Key Management Service (KMS) is a managed encryption service that makes it easy for you to create and control the encryption keys used to encrypt your data.

# Example: Creating a customer managed key in KMS using AWS CLI
aws kms create-key --description "My encryption key"

47. What is AWS Step Functions?

AWS Step Functions is a serverless orchestration service that lets you coordinate multiple AWS services into serverless workflows. You can design and run workflows that stitch together services like AWS Lambda and more.

# Example: Creating a state machine in Step Functions using AWS CLI
aws stepfunctions create-state-machine --name my-state-machine --definition file://my-definition.json --role-arn arn:aws:iam::111122223333:role/service-role/MyRole

48. Explain the concept of AWS CloudTrail.

AWS CloudTrail is a service that records all API calls made on your account. It provides visibility into user activity, resource changes, and security-related events.

# Example: Enabling CloudTrail using AWS CLI
aws cloudtrail create-trail --name my-trail --s3-bucket-name my-bucket

49. What is Amazon CloudWatch?

Amazon CloudWatch is a monitoring service for AWS resources and the applications you run on the AWS platform. It collects and tracks metrics, collects and monitors log files, and sets alarms.

# Example: Creating a CloudWatch alarm using AWS CLI
aws cloudwatch put-metric-alarm --alarm-name my-alarm --alarm-description "My alarm" --metric-name CPUUtilization --namespace AWS/EC2 --statistic Average --period 60 --threshold 90 --comparison-operator GreaterThanThreshold --evaluation-periods 1 --alarm-actions arn:aws:sns:us-east-1:111122223333:my-topic

50. What is AWS Glue?

AWS Glue is a fully managed ETL (extract, transform, load) service that makes it easy for you to prepare and load your data for analytics. It automatically generates ETL code to move and transform data.

# Example: Creating a Glue job using AWS CLI
aws glue create-job --name my-job --role arn:aws:iam::111122223333:role/service-role/MyGlueRole --command Name=glueetl,ScriptLocation=s3://path/to/my-script.py

51. Explain what Amazon VPC (Virtual Private Cloud) is.

Amazon VPC allows you to provision a logically isolated section of the AWS Cloud where you can launch AWS resources in a virtual network that you’ve defined. It provides control over the environment, including selecting IP address ranges, subnets, and configuring route tables and network gateways.


52. What is an Auto Scaling group in AWS?

An Auto Scaling group contains a collection of Amazon EC2 instances that are created from a common Amazon Machine Image (AMI). It automatically adjusts the number of instances in the group in response to changes in demand for the application.


53. Explain the concept of AWS CloudFront.

AWS CloudFront is a content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to customers globally. It integrates with other Amazon Web Services products to give developers and businesses an easy way to distribute content to end users.


54. What is AWS Elastic Beanstalk?

AWS Elastic Beanstalk is a fully managed service that makes it easy to deploy and run applications in multiple languages. You simply upload your code, and AWS Elastic Beanstalk automatically handles the deployment, capacity provisioning, load balancing, and monitoring of your application.


55. Explain the concept of AWS Elastic Load Balancer (ELB).

AWS Elastic Load Balancer automatically distributes incoming application traffic across multiple targets, such as EC2 instances, containers, and IP addresses, in one or more Availability Zones.


56. What is AWS RDS (Relational Database Service)?

Amazon RDS is a managed relational database service that makes it easier to set up, operate, and scale a relational database in the cloud. It provides cost-efficient and resizable capacity while managing time-consuming database administration tasks.


57. Explain the concept of AWS S3 (Simple Storage Service).

Amazon S3 is an object storage service that offers industry-leading scalability, data availability, security, and performance. This means customers of all sizes and industries can use it to store and protect any amount of data for a range of use cases.


58. What is Amazon CloudFront Distribution?

An Amazon CloudFront distribution is a collection of data, configuration, and optionally, cache settings, in one of AWS edge locations. It helps to accelerate content delivery to viewers and secure the content with features like AWS WAF, AWS Shield, and SSL/TLS.


59. Explain the concept of AWS IAM (Identity and Access Management).

AWS IAM enables you to manage access to AWS services and resources securely. Using IAM, you can create and manage AWS users and groups, and use permissions to allow and deny their access to AWS resources.


60. What is AWS SNS (Simple Notification Service) Topic?

Amazon SNS topic is an access point for allowing recipients to dynamically subscribe for identical copies of the same notification. One topic can support deliveries to multiple endpoint types — for example, HTTPS, email, or SMS.


61. What is AWS Lambda?

AWS Lambda is a serverless compute service that runs your code in response to events and automatically manages the compute resources for you. It allows you to build and run applications without provisioning or managing servers.


62. Explain what Amazon ECS (Elastic Container Service) is.

Amazon ECS is a fully managed container orchestration service that makes it easy to run, stop, and manage Docker containers on a cluster. You can deploy and manage containerized applications easily and efficiently using ECS.


63. What is Amazon EKS (Elastic Kubernetes Service)?

Amazon EKS is a managed Kubernetes service that makes it easy to deploy, manage, and scale containerized applications using Kubernetes on AWS. It simplifies the process of building, securing, and scaling containerized applications.


64. Explain the concept of AWS CloudFormation.

AWS CloudFormation is a service that helps you model and set up your Amazon Web Services resources so you can spend less time managing those resources and more time focusing on your applications that run in AWS.


65. What is AWS CodePipeline?

AWS CodePipeline is a continuous integration and continuous delivery (CI/CD) service that automates the build, test, and deployment phases of your release process. It enables you to quickly and reliably deliver features, fixes, and updates to your customers.


66. Explain what AWS CodeBuild is used for.

AWS CodeBuild is a fully managed build service that compiles source code, runs tests, and produces software packages that are ready to deploy. It eliminates the need to provision, manage, and scale your own build servers.


67. What is AWS CodeDeploy?

AWS CodeDeploy is a deployment service that automates application deployments to Amazon EC2 instances or on-premises instances. It allows you to deploy code from GitHub, Bitbucket, Amazon S3, or other sources to a variety of compute resources.


68. Explain the concept of AWS Step Functions.

AWS Step Functions is a serverless orchestration service that lets you coordinate multiple AWS services into serverless workflows. You can design and run workflows using a visual interface, making it easy to build applications with distributed components.


69. What is AWS CloudWatch?

Amazon CloudWatch is a monitoring and observability service that provides data and actionable insights for AWS, hybrid, and on-premises applications and infrastructure resources. It helps you gain system-wide visibility into resource utilization, application performance, and operational health.


70. Explain what AWS CloudTrail is used for.

AWS CloudTrail is a service that records AWS API calls for your account and delivers log files to an Amazon S3 bucket that you specify. It helps you monitor and retain account activity, including actions taken through the AWS Management Console, AWS CLI, and AWS SDKs.


71. What is AWS IAM?

AWS IAM (Identity and Access Management) is a web service that helps you securely control access to AWS resources. It allows you to manage users, groups, and permissions to securely interact with your AWS services.


72. Explain the concept of AWS VPC.

Amazon Virtual Private Cloud (Amazon VPC) enables you to launch Amazon Web Services resources into a virtual network that you’ve defined. It provides complete control over your virtual networking environment, including selection of your IP address range, creation of subnets, and configuration of route tables and network gateways.


73. What is an AWS Auto Scaling Group?

An AWS Auto Scaling group contains a collection of Amazon EC2 instances that are created from a common Amazon Machine Image (AMI). It automatically increases or decreases the number of instances in response to changes in demand for the application.


74. Explain the purpose of AWS S3 (Simple Storage Service).

Amazon S3 is an object storage service that offers industry-leading scalability, data availability, security, and performance. It is designed to store and retrieve any amount of data from anywhere on the web.


75. What is Amazon RDS (Relational Database Service)?

Amazon RDS is a fully managed relational database service that makes it easier to set up, operate, and scale a relational database in the cloud. It provides cost-efficient and resizable capacity while managing time-consuming database administration tasks.


76. Explain the concept of AWS Lambda Layers.

AWS Lambda Layers is a distribution mechanism for libraries, custom runtimes, and other function dependencies. It allows you to manage your in-development function code independently from the unchanging code and resources that it uses.


77. What is AWS Elastic Beanstalk?

AWS Elastic Beanstalk is an easy-to-use service for deploying and scaling web applications and services. It automatically handles the deployment details, capacity provisioning, load balancing, and application health monitoring.


78. Explain the use of Amazon Route 53.

Amazon Route 53 is a scalable domain name system (DNS) web service designed to provide highly reliable and cost-effective domain registration, DNS routing, and health checking of resources within your application.


79. What is AWS KMS (Key Management Service)?

AWS Key Management Service (KMS) makes it easy for you to create and manage cryptographic keys and control their use across a wide range of AWS services and in your applications.


80. Explain the purpose of Amazon CloudFront.

Amazon CloudFront is a content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to customers globally. It integrates with other Amazon Web Services products to give developers and businesses an easy way to distribute content.


81. What is AWS CloudFormation?

AWS CloudFormation provides a common language for describing and provisioning all the infrastructure resources in your cloud environment. It allows you to use a template to model and set up your Amazon Web Services resources.


82. Explain the concept of AWS ECS (Elastic Container Service).

AWS ECS is a fully managed container orchestration service that makes it easy to run, stop, and manage Docker containers on a cluster. It eliminates the need to install, operate, and scale your own container orchestration software.


83. What is AWS Elasticache?

AWS ElastiCache is a web service that makes it easy to deploy and operate an in-memory cache in the cloud. It supports the popular open-source in-memory caching engines, Memcached and Redis.


84. Explain the purpose of AWS Direct Connect.

AWS Direct Connect is a network service that provides dedicated network connections from your on-premises data centers to AWS. It allows you to establish a private network connection between AWS and your data center, office, or co-location environment.


85. What is AWS CloudTrail?

AWS CloudTrail is a service that records AWS API calls for your account and delivers log files to an Amazon S3 bucket. It enables governance, compliance, operational auditing, and risk auditing of your AWS account.


86. Explain the use of AWS CodeDeploy.

AWS CodeDeploy is a fully managed deployment service that automates software deployments to a variety of computing services, including Amazon EC2, AWS Fargate, AWS Lambda, and your on-premises servers.


87. What is AWS Redshift?

Amazon Redshift is a fully managed, petabyte-scale data warehouse service that makes it simple and cost-effective to analyze all your data using your preferred business intelligence tools.


88. Explain the concept of AWS CloudWatch.

Amazon CloudWatch is a monitoring service for AWS resources and the applications you run on the cloud platform. It collects and tracks metrics, collects and monitors log files, and sets alarms.


89. What is AWS Glue?

AWS Glue is a fully managed extract, transform, and load (ETL) service that makes it easy for you to prepare and load your data for analytics. You can create and run an ETL job with a few clicks in the AWS Management Console.


90. Explain the purpose of AWS Step Functions.

AWS Step Functions is a serverless orchestration service that lets you coordinate distributed applications and microservices using visual workflows.


91. What is AWS Lambda?

AWS Lambda is a serverless computing service that lets you run code without provisioning or managing servers. It automatically scales and manages the underlying resources required to run your code.


92. Explain AWS Kinesis.

Amazon Kinesis is a platform for streaming data on AWS. It enables real-time processing of streaming big data and is designed for applications that require real-time processing of streaming data.


93. What is AWS S3?

Amazon Simple Storage Service (S3) is an object storage service that offers industry-leading scalability, data availability, security, and performance. It’s designed to store and retrieve any amount of data from anywhere on the web.


94. Explain the concept of AWS RDS.

Amazon RDS (Relational Database Service) is a managed database service that makes it easier to set up, operate, and scale a relational database in the cloud. It supports multiple database engines like MySQL, PostgreSQL, SQL Server, and others.


95. What is AWS IAM?

AWS Identity and Access Management (IAM) is a web service that helps you securely control access to AWS resources. It allows you to create and manage users and groups and use permissions to allow and deny their access to AWS resources.


96. Explain the use of AWS SNS.

Amazon Simple Notification Service (SNS) is a fully managed messaging service that enables you to decouple microservices, distributed systems, and serverless applications. It can send messages, notifications, and alerts to a distributed set of recipients.


97. What is AWS VPC?

Amazon Virtual Private Cloud (Amazon VPC) enables you to launch Amazon Web Services (AWS) resources into a virtual network that you’ve defined. It provides control over your virtual networking environment, including selection of your IP address range, creation of subnets, and configuration of route tables.


98. Explain AWS Elastic Beanstalk.

AWS Elastic Beanstalk is an easy-to-use service for deploying and scaling web applications and services developed with multiple languages. It automatically handles the deployment details, capacity provisioning, load balancing, and automatic scaling.


99. What is AWS Route 53?

Amazon Route 53 is a highly scalable and reliable Domain Name System (DNS) web service. It’s designed to give developers and businesses an extremely reliable and cost-effective way to route end users to Internet applications.


100. Explain AWS DynamoDB.

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. It’s designed for internet-scale applications and can handle large amounts of data.