Become an AWS Expert with These 20 AWS Interview Questions

The AWS Course will teach you about cloud architecture, auto-scaling, vertical scalability, security, and more. This one-of-a-kind set of AWS interview questions is designed for professionals interested in learning more about cloud computing.

What is AWS? 

AWS is the acronym for Amazon Web Services, Amazon’s cloud-based service. EC2 (Elastic Compute Cloud), S3 (Simple Storage Service), RDS (Relational Database Service), and Lambda are well-known Amazon services. With AWS’s pay-as-you-go model, which allows users to pay only for the services they employ, businesses may save money on IT infrastructure expenses.

Here are some AWS Interview Questions for developers and experienced personnels. We have also mentioned some scenario-based Interview questions. 

AWS Interview Questions for Developers 

1. What is the purpose of subnets?

You can divide an extensive network into smaller ones by using subnets. There are numerous reasons to build these subnets. Subnets, for example, can help alleviate congestion by ensuring that traffic intended for a subnet remains within that subnet. This allows the network to route data more efficiently, making the network less congested.

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2.  Can I upload a file larger than 100 MB to Amazon S3?

Sure, you can accomplish it using AWS’s multipart upload tool. Using the multipart upload program, you can submit larger files in multiple parts. You can also expedite the uploading process by posting these components simultaneously. When the details are uploaded and combined into a single object or file, the original file from which they were created is created.

3. How many S3 buckets can you make at a single time?

A maximum of 100 S3 buckets can be created.

4. How can the root drive’s data be saved on an EBS-enabled computer?

By disregarding the terminate option, we can save the data.

5. How many subnets are permitted in a VPC? How many VPCs can an account/region have?

Each account or region can have up to five VPCs and 200 subnets.

6. Which Amazon storage plan would you use to archive data quickly and cheaply?

AWS Glacier, an Amazon storage service that is unexpectedly inexpensive, is used to store and back up data. The cost of keeping data in Glacier decreases over time.

7. When instances with store-backed or EBS-backed storage are terminated, the data on their root volumes is erased automatically. Which case would you use to prevent this from happening?

EBS backs up instances. EBS volume is the root volume for EBS-backed instances. Snapshots make it simple to back up and duplicate the virtual drives that comprise an EBS volume.

8. Your organization desires to send and receive compliance-related emails from and to clients using its email address and domain. Which service would you recommend for performing the same task swiftly and affordably?

This can be accomplished by sending emails via the cloud-based Amazon Simple Email Service (Amazon SES).

9, Can Amazon EC2 instances be launched with already-configured private IP addresses? If so, which Amazon service enables this?

Yes. This is possible with VPC (Virtual Private Cloud).

10. Will a secondary RDS be launched in the same availability zone as the primary RDS?

They are not physically connected since standby infrastructures are automatically configured in separate availability zones from primary infrastructures. This is because the primary function of standby instances is to defend against infrastructure failure. Therefore, if the primary instance fails, the standby instance will aid data recovery.

11. Which Amazon service would you use to accelerate the transmission of petabytes of data from AWS to secure storage devices?

Snowball, Amazon. AWS Snowball is the method for moving massive amounts of data stored on physical devices into and out of Amazon.

12. Can you use standby DB instances with your primary DB instance if your DB instance has a Multi-AZ deployment?

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Since the standby DB instances are intended only if the primary instance fails, they cannot be used simultaneously with the prior DB instances.

13. What is the name of Amazon’s Content Delivery Network ?

Amazon CloudFront 

14. How do I access Amazon Simple Storage containers to conduct access audits?

AWS CloudTrail is designed to log and trace API calls and is also available for storage solutions, so it applies in this scenario.

15. Can an instance-backed root volume be converted to an EBS-backed root volume at any time?

No, it’s not feasible.

Scenario Based Interview Questions

Top 20 AWS Interview Questions to Practice
  1. You have been given an EC2 instance with high CPU utilization and instructed to enhance its efficacy. What steps would you take to identify the problem and correct it?

I would begin by using Amazon CloudWatch to monitor how much CPU an EC2 instance consumes and search for patterns or spikes in utilization. This would assist me in locating and fixing the issue. Then, I would examine the instance’s active processes to determine which consumes the most CPU power. Next, consider making those processes more efficient or expanding the instance to accommodate the volume of work. I recommend implementing auto-scaling rules that automatically add or delete instances based on demand.

  1. Consider the following scenario: Your company’s website receives excellent traffic, and you have been tasked with scaling the application to accommodate the increased demand. How would you utilize Amazon’s services to expand your app?

I would use Amazon CloudFront and Elastic Load Balancing to distribute traffic across multiple instances to scale an AWS web application to meet growing demand. I recommend using Amazon EC2 Auto Scaling to add or remove instances automatically based on demand. Depending on the application’s requirements, I would also use Amazon RDS to optimize the database and grow it vertically or horizontally. Lastly, I would use Amazon CloudWatch to monitor the app’s performance and modify the scaling parameters.

  1. Imagine you are tasked with developing a highly available, fault-tolerant web application. What AWS services would you use, and how would you configure them?

While developing a highly available and fault-tolerant architecture for a web application, I would utilize Amazon Route 53 for DNS resolution, Amazon CloudFront and Elastic Load Balancing for load balancing and traffic distribution, and Amazon EC2 Auto Scaling for automated scaling. I would also consider Amazon RDS for database management with high availability and replication across multiple Availability Zones. As part of a disaster recovery strategy, Amazon S3 would be utilized for backup and recovery, and Amazon CloudWatch would be used for monitoring and alarms.

  1. Your company desires to relocate its data center to Amazon from its current location. What considerations are necessary when planning this relocation?

When planning a transition from an on-premises data center to Amazon, it is essential to consider security, compliance, performance, and cost. This includes determining what needs to be done regarding data backup, recovery, and storage and ensuring that data is encrypted during transmission and storage. The correct instance type and capacity must be chosen for each application based on the application’s load requirements. Finally, you must consider how the migration will affect your finances and sensibly optimize your AWS resources.

  1. Imagine you are responsible for protecting an S3 container containing sensitive data. How would you ensure that the container is secure and that only authorized users can access it?

 I would use Amazon Identity and Access Management (IAM) to set up access controls allowing only authorized users and applications to access an S3 container containing sensitive data. I would also use SSL/TLS to encrypt the data in transit and server-side encryption on Amazon S3 to safeguard the data at rest. I would also use Amazon CloudWatch to configure monitoring and logging to trace access and send alerts for suspicious activity. Additionally, I would employ the Amazon S3 bucket parameters to restrict access to the bucket.


AWS has become popular for businesses because it is easy to use, scalable, and cheap. Because of this, the need for people with AWS knowledge and credentials is growing.

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