AWS interview questions and answers | AWS interview questions for DevOps

AWS interview questions for DevOps

1.What is AWS?

Answer: AWS (Amazon Web Services) is a cloud computing platform provided by Amazon. It offers a wide range of services including computing power, storage, database, networking, and more.

2.What are the key components of AWS?

Answer: The key components of AWS include Amazon EC2 (Elastic Compute Cloud), Amazon S3 (Simple Storage Service), Amazon RDS (Relational Database Service), and Amazon VPC (Virtual Private Cloud).

3.What is the difference between Amazon S3 and Amazon EBS?

Answer: Amazon S3 is an object storage service used for storing and retrieving data, while Amazon EBS (Elastic Block Store) provides block-level storage volumes for use with EC2 instances.

4.What is an EC2 instance?

Answer: An EC2 instance is a virtual server in the cloud that can be used to run applications. It provides scalable computing capacity and allows users to choose the instance type, operating system, and other configurations.

5.What is auto scaling in AWS?

Answer: Auto Scaling is a feature in AWS that automatically adjusts the number of EC2 instances based on the demand. It helps maintain application availability and ensures efficient resource utilization.

6.What is an IAM role?

Answer: IAM (Identity and Access Management) role is a secure way to grant permissions to entities within AWS. It enables users, services, or EC2 instances to access AWS resources without the need for storing long-term access keys.

7.What is AWS Lambda?

Answer: AWS Lambda is a serverless compute service that allows you to run your code without provisioning or managing servers. It automatically scales based on the incoming request volume.

8.What is Amazon RDS?

Answer: Amazon RDS (Relational Database Service) is a managed database service that makes it easy to set up, operate, and scale a relational database in the cloud. It supports various database engines like MySQL, PostgreSQL, and Oracle.

9.What is Amazon VPC?

Answer: Amazon VPC (Virtual Private Cloud) is a logically isolated virtual network within AWS. It enables you to launch AWS resources in a defined virtual network and provides control over network settings, including IP addressing and subnets.

10.How does data transfer work in AWS?

Answer: Data transfer within AWS is generally free for inbound traffic, while outbound traffic is charged based on the data transferred out of AWS. Transfer costs can vary depending on the AWS service and the region.

11.What is the difference between Amazon S3 and Amazon Glacier?

Answer: Amazon S3 is designed for frequent and immediate access to data, while Amazon Glacier is a low-cost storage service for data archiving and long-term backup. Glacier offers slower retrieval times but significantly lower storage costs.

12.What is CloudFront?

Answer: CloudFront is a content delivery network (CDN) provided by AWS. It helps distribute content (such as images, videos, and web pages) to users globally with low latency and high data transfer speeds.

13.What is the AWS Shared Responsibility Model?

Answer: The AWS Shared Responsibility Model outlines the division of security responsibilities between AWS and its customers. AWS is responsible for securing the underlying infrastructure, while customers are responsible for securing their applications and data in the cloud.

14.What is the purpose of Amazon CloudWatch?

Answer: Amazon CloudWatch is a monitoring and observability service that provides visibility into your AWS resources and applications. It collects and tracks metrics, monitors log files, sets alarms, and can automatically react to changes in your environment.

15What is the AWS Well-Architected Framework?

Answer: The AWS Well-Architected Framework is a set of best practices and guidelines for designing and operating reliable, secure, efficient, and cost-effective systems on AWS. It covers architecture, security, reliability, performance, and cost optimization.

16.What are the different storage classes in Amazon S3?

Answer: Amazon S3 provides different storage classes, including Standard, Intelligent-Tiering, Glacier, and S3 One Zone-Infrequent Access. Each class has different features, availability, durability, and pricing options.

17.How does AWS handle security?

Answer: AWS employs a multi-layered approach to security, incorporating physical security, network security, data encryption, access management, and compliance certifications. AWS services provide tools and features to help customers secure their applications and data.

18.What is CloudFormation?

Answer: AWS CloudFormation is a service that allows you to define and deploy infrastructure as code. It enables you to create a template that describes your desired AWS resources and automatically provisions and configures them.

19.What is the AWS Serverless Application Model (SAM)?

Answer: AWS SAM is an open-source framework for building serverless applications. It extends AWS CloudFormation and provides simplified syntax to define serverless resources such as Lambda functions, API Gateway endpoints, and DynamoDB tables.

20.How can you ensure high availability in AWS?

Answer: To ensure high availability in AWS, you can use services like Auto Scaling, Elastic Load Balancing, and Amazon RDS Multi-AZ deployments. These services help distribute traffic, automatically scale resources, and provide fault tolerance.

Certainly! Here are 20 AWS technical interview questions along with their answers:

21.What is the difference between AWS S3 and EBS storage?

Answer: AWS S3 is object storage designed for storing and retrieving large amounts of unstructured data, while EBS (Elastic Block Store) provides block-level storage volumes for use with EC2 instances.

22.What is the maximum size of an S3 object?

Answer: The maximum size of an S3 object is 5 terabytes.

23.How does Amazon CloudFront improve website performance?

Answer: Amazon CloudFront is a content delivery network (CDN) that caches content at edge locations close to the end-users. It helps reduce latency and improve website performance by delivering content from the nearest edge location.

24.What is AWS Lambda and how does it work?

Answer: AWS Lambda is a serverless compute service that allows you to run your code without provisioning or managing servers. It works by executing your code in response to events, such as changes to data in an S3 bucket or updates to a DynamoDB table.

25.How can you secure data at rest in Amazon S3?

Answer: You can secure data at rest in Amazon S3 by enabling server-side encryption using Amazon S3 managed keys (SSE-S3), AWS Key Management Service (SSE-KMS), or a customer-provided key (SSE-C).

26.How can you monitor AWS resources and applications?

Answer: AWS provides Amazon CloudWatch, a monitoring and observability service that collects and tracks metrics, monitors log files, sets alarms, and provides insights into your AWS resources and applications.

27.What is the difference between AWS RDS and DynamoDB?

Answer: AWS RDS (Relational Database Service) is a managed database service that supports relational databases like MySQL, PostgreSQL, and Oracle. DynamoDB is a fully managed NoSQL database service.

28.What is an AWS VPC and how does it work?

Answer: An AWS VPC (Virtual Private Cloud) is a virtual network that you can define in AWS. It allows you to launch AWS resources in a logically isolated section of the AWS cloud and control network settings, IP addressing, and subnet configurations.

29.What is an AWS Availability Zone (AZ)?

Answer: An AWS Availability Zone (AZ) is a physically distinct data center within an AWS Region. AZs are designed to be isolated from failures in other AZs and provide high availability and fault tolerance.

30.How can you scale EC2 instances automatically based on demand?

Answer: You can use AWS Auto Scaling to scale EC2 instances automatically based on demand. Auto Scaling allows you to define scaling policies and dynamically adjust the number of instances to meet performance requirements.

31.How can you achieve high availability for a database in AWS?

Answer: To achieve high availability for a database in AWS, you can use services like Amazon RDS Multi-AZ deployments or Amazon Aurora with Multi-AZ deployments. These services replicate data across multiple Availability Zones to provide automatic failover.

32.What is the AWS Identity and Access Management (IAM)?

Answer: AWS IAM is a web service that helps you securely control access to AWS resources. It allows you to manage users, groups, roles, and permissions to grant or deny access to AWS services and resources.

33.How can you ensure data durability in Amazon S3?

Answer: Amazon S3 automatically stores data redundantly across multiple devices and facilities within a region to ensure durability. It provides a 99.999999999% (11 nines) durability for stored objects.

34.How can you improve performance in DynamoDB?

Answer: To improve performance in DynamoDB, you can use techniques like partitioning your data effectively, selecting appropriate indexes, and adjusting provisioned throughput capacity based on workload requirements.

35.What is AWS CloudFormation and how does it work?

Answer: AWS CloudFormation is a service that allows you to define and provision AWS infrastructure as code. It uses templates to describe the desired resources and automates the creation, update, and deletion of those resources.

36.How can you secure data in transit in AWS?

Answer: To secure data in transit in AWS, you can use SSL/TLS encryption for data sent over the network. AWS services like ELB (Elastic Load Balancing), CloudFront, and API Gateway support SSL/TLS termination.

37.What is AWS Elastic Beanstalk?

Answer: AWS Elastic Beanstalk is a platform as a service (PaaS) that simplifies the deployment and management of applications. It automatically handles infrastructure provisioning, capacity scaling, and application health monitoring.

38.What is AWS CloudTrail?

Answer: AWS CloudTrail is a service that enables governance, compliance, and operational auditing of your AWS account. It records API calls and delivers log files containing valuable information about API activity and resource usage.

39.How can you migrate an on-premises database to AWS?

Answer: You can use services like AWS Database Migration Service (DMS) or AWS Schema Conversion Tool (SCT) to migrate an on-premises database to AWS. These services simplify the process of migrating schema, data, and ongoing replication.

40.How does AWS handle disaster recovery?

Answer: AWS provides several services and features for disaster recovery, including cross-region replication, automated backups, snapshots, and the ability to launch resources in different Availability Zones. These options help ensure business continuity in the event of a disaster.

About Admin MC3

This is dummy text. It is not meant to be read. Accordingly, it is difficult to figure out when to end it. But then, this is dummy text. It is not meant to be read. Period.