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Master the Cloud: 25 AWS Interview Questions for Freshers & Experts

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Introduction

Amazon Web Services (AWS) is the world's most widely used cloud platform. With its rapidly growing popularity, AWS skills are in demand in industries. Whether you start in Cloud Computing or start an experienced professional to upgrade your skills, it is a smart step to prepare for AWS interview. Interviews often test candidates on basic AWS concepts, general services, security, scalability and real -time cloud problems. In this blog we have collected 25 carefully selected AWS interview questions with easy-to-understand answers. These questions cover the beginning of advanced subjects, so you are fully prepared to impress your interviewer. We interpret each response to about 100 words by using simple and clear languages. This guide is perfect for preparation or deep change of last minute before your . Let's dive and master AWS job interviewthe cloud, a question at a time!

1. What is AWS?

AWS is for the Amazon Web Services. It’s a cloud computing platform provided by Amazon. It offers services such as storage, computing power and database on the Internet. AWS helps companies save money by paying only what they use. Instead of buying expensive servers, companies use AWS to create and run applications. It supports many programming languages ​​and equipment. AWS services are available on-demand and scalable, which means you can increase or reduce resources as needed. It is safe, reliable and used by many large companies around the world.

2. What is EC2 in AWS?

The EC2 stands for the elastic calculation cloud. This allows users to run a virtual server called Institutes in Cloud. These examples treat CPU, RAM and storage as a real computer. The EC2 helps you distribute and manage the application quickly. You can choose different examples -types based on your charge. You also have complete control over configuration, security and networks. The EC2 makes it easier to up or down resources depending on your application requirement. You only pay for the time you spend, making it cost -effective and flexible.

3. What is S3 in AWS?

S3 is for easy storage service. It is used anywhere, to store and reconstruct data at any time. The S3 stores the data as an object inside the bucket. You can collect photos, videos, documents, backup and more. It is very durable and safe. You can check access to your files using permits. S3 also provides features such as version, data encryption and life cycle policy. It is automatically scaled to handle more data as needed. S3 is widely used for backup, collection, static web hosting and large data application.

4. What is IAM in AWS?

IAM stands for identification and access management. It is a service that helps you manage users, groups and permits in AWS. With IAM you can create users and assign specific roles. Each user gets unique credentials and only what they need. IAM helps protect your resources by using the principle of least privileges. You can also specify multifactor authentication (MFA) for further security. IAM is free to use and work all AWS services. This cloud is necessary to handle safe access to the environment.

5. What is the difference between public and private subnets in AWS?

In AWS, a public subnet is connected to the Internet via the Internet Gateway. Examples in public subnettes can send and get data on the Internet. A private subnet does not have direct access to the Internet. It is used to run backnd services such as databases and internal applications. Private subnets depend on Nat Gateway or NAT incoming to reach the Internet. Separating public and private subnets improves safety and performance. It also helps to design safe and well -structured VPC architecture.

6. What is VPC?

VPC means virtual private cloud. This allows you to create a safe and insulated network in AWS. You can start resources such as EC2, RDS and Lambda inside VPC. You can define your own IP address area, subnet, rootboard and gateway. VPC gives you complete control over network settings, security groups and access rules. This helps produce secure applications in the cloud. With VPC you can also connect your interior network to AWS using VPN or Direct Connect.

7. What is an AMI?

AMI means Amazon machine image. It is a template used to start the EC2 occurrence. An AMI consists of operating systems, application servers and applications. You can use the pre -made AMIS provided by AWS or create your own custom Amies. AMI helps create constant environment in many examples. They make it easy to return and restore the server. When you launch an example from AMI, it creates a copy of that image as a running server.

8. What is Auto Scaling?

Autom scaling automatically adjusts the number of EC2 examples in your application based on traffic. As demand increases, it combines several examples. When demand falls, it removes them. It helps maintain performance and saves money. Auto Scaling uses guidelines based on CPU use, network traffic or plan. It works with a load ballncer to evenly distribute traffic. It improves reliability and ensures that your application is always available.

9. What is a Security Group?

A safety group acts as a virtual firewall for EC2 examples. It checks the upcoming and outgoing traffic in your examples. You can define rules based on IP address, port number and protocol. Safety groups are static, which means that if a request is allowed, the response is automatically allowed. They are associated with examples and can be changed at any time. Security groups help protect your AWS environment by limiting unwanted access.

10. What is Elastic Load Balancer?

ELASTIC LOAD BALLRENCHOR (ELB) automatically distributes traffic in multiple EC2 examples. This helps your application to be available and reliable. ELB discovers unhealthy examples and rootfrale people. It supports different types of application load ballncer, network balance and classic load balance. ELB improves scalability, performance and fault tolerance. It works well with car scaling to handle high traffic.

11. What is CloudFront?

CloudFront is a content delivery network (CDN) from AWS. It provides data, video and web material to users who use Edge locations around the world. When a user asks for the material, CloudFront protects it to the nearest place. It reduces the delay and improves speed. It also provides security with SSL and DDOS security. Cloudfront is integrated with S3, EC2 and other AWS services. It helps to load websites and applications faster.

12. What is Route 53?

Route 53 AWS Domain Name System (DNS) is service. This helps to mess user requests for websites and applications. Route 53 AWS for the IP address of 53 AWS Resources links domain names as DOT com. It supports domain registration, DNS routing and health check. The root 53 is very accessible and scalable. It works well with other AWS services to offer fast and secure routing.

13. What is Lambda in AWS?

AWS Lambda is a server -free calculation service. This allows you to run the code without offering the server. You simply upload your code and Lambda runs it in response to events. These events can come from S3, Dynamodb or HTTP requests. You only pay for the time when your code is running. Lambda automatically handles scales and errors. It supports node.js, python, java and other languages. It is ideal for automation, APIs and microsaris.

14. What is AWS CloudFormation?

CloudFormation helps you manage AWS infrastructure as a code. You can define resources such as EC2, S3 and VPC in the template using Yaml or Json. CloudFormation creates, updates or removes resources automatically. It ensures frequent environment and simple replication. If something goes wrong, it also supports Rollback. Cloudformation saves time and reduces manual infrastructure setup errors.

15. What is the difference between vertical and horizontal scaling?

Vertical scaling means increasing the size of your example (eg more CPU or memory). It’s simple, but has limitations. Horizontal scaling means adding more examples to handle traffic. This provides better fault tolerance and performance. AWS supports both scaling types. Car scaling is an example of horizontal scaling. RDS can use vertical scaling for better database performance.

16. What is Elastic Beanstalk?

The elastic Beanstock is a platform-e-a-service (PAA) introduced by AWS. This helps you distribute and manage the application. You upload your code and Beanstock handles distribution, scaling and monitoring. It supports Java, Python, PHP, node.js and more. Besestock automatically sets EC2, Last Ballncer and Auto Scale. This is perfect for developers who want to focus on code without management of infrastructure.

17. What is AWS RDS?

The importance of RDS is a relationship database service. This allows you to run and manage the database in the cloud. It supports MySQL, Postgresql, SQL Server, Oracle and Amazon Aurora. RDS automatic automatic’s features such as backup, update and monitoring. It provides high availability with purineogenic with several ways. RDS easily improves scales and performances. You can safely connect it using VPC and IAM.

18. What is AWS CloudWatch?

Cloudwatch AWS is a resource surveillance service. It collects calculations, logs and events. You can specify alarms and automatic actions based on performance. For example, you can trigger automatic scaling when the use of CPU is more. Cloudwatch helps identify problems and optimize applications. It is integrated with EC2, Lambda, RDS and other AWS services.

19. What is AWS CLI?

AWS CLI is a command line tool for interacting with AWS services. You can create resources, manage and remove using commands. It is useful for automation and scripting. You can install it on Windows, MacOS and Linux. AWS CLI uses configuration files or environmental variables for authentication. It is sharp and effective to manage sheltering resources.

20. What is AWS EBS?

EBS stands for the Elastic Block Store. This provides block level storage for EC2 examples. You can use it to store data such as database, files or logs. EBS volume is frequent, which means that data remains even after stopping an example. You can choose different types of volume depending on the performance requirements. EBS supports snapshots, encryption and backup functions.

21. What is a snapshot in AWS?

A snapshot is a backup of your EBS volume. It captures the current position of the volume and stores it in S3. You can use snapshot to restore data or create new volumes. Drunk images are incremental, so only changes are stored after the first backup. They help with disaster recovery and data migration.

22. What is AWS Trusted Advisor?

Trusted Advisor is a device that offers the best procedure for your AWS account. It checks for safety, costs, performance and fault tolerance. It provides recommendations such as closing unused resources, enabling MFA or upgrading examples. Reliable advisor helps you customize AWS use and improve safety. It is especially useful for regular revision and reviews.

23. What is Multi-AZ in RDS?

Multi-of RDS provides high accessibility by creating a standby copy automatically in another field of accessibility. If the main database fails, Standby takes without manual intervention. This ensures minimum shutdown and better fault tolerance. Multi-AAS is recommended for the production database that requires high reliability.

24. What is AWS SNS?

SNS is for easy notification service. It sends messages or information to users or systems. You can use it to trigger e -post, SMS or HTTP requests. SNS is event-driven and supports push messages. It is integrated with S3, EC2, Lambda and other AWS services. SNS is useful for notifications, updates and automation.

25. What is the difference between AWS and Azure?

Both AWS and Azure are cloud platforms. AWS is from Amazon and Azure is from Microsoft. AWS offers several services and has a large market share. Azure Office and Windows are better integrated with Microsoft tools that serve. Both offer similar services such as calculations, storage, networks and databases. The alternative depends on the needs and equipment of your project.

Conclusion

AWS should not be heavy to prepare for an interview. With the right set of questions and clear answers, you can create a solid understanding of AWS services and cloud architecture. This blog included 25 important AWS interview questions for fresh and professionals. We discussed the main themes such as EC2, S3, IAM, Lambda and VPC, as well as advanced areas such as CloudFormation , Auto SCLEING and MULTIAZ. These questions not only help you prepare for an interview, but also strengthen your knowledge how AWS works in real -world -scenarios. Remember that practice on hands is as important as theoretical knowledge. Therefore, try to use what you learned by searching for AWS console or using AWS Free Tier. With practice and self -confidence, you will be ready to sing your AWS interviews and launch a successful skis career. Keep learning, keep growing – and mastered the cloud!

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