Top 90 AWS Interview Questions and Answers [Updated 2021]

The modern world today witnessed significant changes in the works of business and organization. Everything is digitized, and the introduction of the Cloud and Cloud Computing platform has become the main driving force behind this growth. At present, most businesses use or plan to use cloud computing, aided with the expertise of cloud consulting services for many of their operations, which results have caused a massive surge in need of cloud professionals.

While the opportunity is sufficient, there is a large skill gap in the cloud industry that has caused the business to lose almost $ 258 million per year. To fill this skill gap, the company is constantly looking to find the right cloud professionals. This deficiency has created a great opportunity for individuals who are familiar with the clouds and how it works.

If you are interested in a career in the Cloud industry, chances are you have arrived. With a cloud computing platform like AWS take the current business scenario with a storm, trained and certified in certain platforms can give you a very good career prospect. Remember that AWS training and certification will only give you unique knowledge for the platform, although there may be ideas and principles that can transport to other cloud providers.

But to start your AWS career, you need to organize their interviews and ACE. In the spirit of doing it, here are some AWS interview questions and answers that will help you with the interview process. This is a scenario-based question that tests the depth of your knowledge.

1. Determine and explain three basic types of Cloud services and AWS products built based on them?

Three basic types of Cloud services are:




Here are some AWS products built based on three types of Cloud services:

Computing – this includes EC2, Elastic Beanstalk, lambda, automatic scaling, and lightsat.

Storage – this includes S3, glaciers, elastic block storage, elastic file systems.

Network – this includes VPC, Amazon CloudFront, Route53

2. What is the relationship between the availability zone and region?

The AWS area is a separate geographical area, such as US-West 1 (North California) and Asia South (Mumbai). On the other hand, the availability zone is the area present in the region. This is generally an isolated zone that can replicate itself whenever needed.

3. What is the automatic scale?

Automatic arbiter is a function that allows you to provide and launch new instances every time there is a request. This allows you to automatically add or reduce resource capacity in relation to requests.

4. What is geographical targeting in CloudFront?

Geo-targeting is a concept where businesses can show personalized content to their audience based on their geographical location without changing the URL. This helps you create customized content for certain geographical area audiences, keep their needs at the forefront.

5. What are the steps involved in the formation solution?

Here are the steps involved in the Cloud Formation solution:

Create or use existing cloudFormation templates using JSON or YAML format.

Save the code in the S3 bucket, which functions as a repository for the code.

Use the Cloud AWS formation to call a bucket and make a stack on your template.

Cloud Formation reads files and understands the services called, their order, relationship between service, and service provisions one by one.

6. How do you update or lower the system with near-zero downtime?

You can update or lower the system with stopping close to zero using the following migration steps:

Open the EC2 Console.

Choose the Ami operating system

Launch Instance with New Instance Types

Install all updates

Install the application

Instance test to see if it works

If it works, use a new instance and change longer examples

After deployed, you can update or lower the system with near-zero downtime.

7. What tools and techniques you can use in AWS to identify if you pay more than you should, and how to fix it?

You can find out that you pay the correct amount for the resources you use using the following resources:

Check the top service table

This is a dashboard in the cost management console that shows you five most widely used services. This will tell you how much money you spend on the resource in question.

Explorer fee.

There is an Explorer cost service available that will help you to view and analyze your usage costs over the past 13 months. You can also get an estimated cost for the next three months.

Aws budget

This allows you to plan a budget for service. Also, it will allow you to check whether the current package meets your budget and details about how you use services.

Cost allocation tags

This helps in identifying more expensive resources in certain months. This allows you to set up resources and cost allocation tags to track your AWS fees.

Learn how to design, plan, and increase the implementation of Cloud and Excel in the field of cloud computing with Simplilearn Postgraduate Program in Cloud Computing.

8. Are there other alternative tools to enter the cloud environment other than the console?

It can help you get into AWS resources are:


AWS CLI for Linux

AWS CLI for Windows

AWS CLI for Windows CMD



9. What services can be used to make centralized logging solutions?

Important services that you can use are the Amazon Cloudwatch log, save it on Amazon S3, and then use Find Amazon Elastic to visualize it. You can use Amazon Kinesis Firehose to move data from Amazon S3 to Amazon ElasticSearch.

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