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AWS

Home > Topics > AWS

148 real interview questions. Study this page end-to-end — open a detail page only when an answer is enriched.

Table of contents

Overview
Questions 148
Easy / Medium / Hard 23 / 115 / 10
Companies 14

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Beginner

Intermediate

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Technical

Technical Round 1

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All questions

Question Diff Asked
A developer cannot access a S3 bucket. What will you check? Medium 1
A few AWS services and their use cases. Medium 1
An application deployed on AWS suddenly becomes unavailable. How would you troubleshoot the issue step by step? Medium 1
An application gets an "Access Denied" error while accessing S3. Where would you start looking? Medium 1
An application works perfectly in one Availability Zone but intermittently fails in another. What AWS networking components would you verify first? Medium 5
An AWS EC2 instance becomes unreachable. What's your recovery plan? Medium 2
An EC2 instance becomes unreachable. What steps would you follow to troubleshoot it? Medium 1
An EC2 instance is marked healthy, but users cannot access the application. How would you troubleshoot the issue? Medium 1
An EC2 instance is running at 100% CPU. How would you investigate the issue? Medium 1
An EC2 instance suddenly becomes unreachable. How would you troubleshoot it? Medium 1
AWS Medium 3
AWS / Azure Cloud Services Medium 1
AWS cost and performance issues Medium 1
AWS EC2 Medium 2
AWS Glue jobs fail immediately after starting. What would be your first troubleshooting step? Medium 1
AWS Lambda is failing internally. What are your debugging steps? Medium 1
AWS networking and DevOps services Medium 1
AWS provides an HTTP endpoint. How would you enable HTTPS? Medium 1
AWS/Azure Cloud Fundamentals Medium 1
AWS/Azure/GCP Medium 4
Can you describe your experience with cloud providers like AWS, Azure, or GCP? Medium 1
Can you explain AWS architecture? Hard 2
Can you explain how to implement security best practices in AWS? Medium 1
Can you explain S3 standard and S3 glacier ? Medium 2
Can you tell me the types of s3 storage? Medium 1
Deploy and manage applications on AWS Medium 1
Difference between public and private subnets in AWS. Easy 2
Difference load balancers in AWS ? Medium 2
Do you have experience with AWS Control Tower? Medium 1
Do you have some experience on Amazon Connect or Lambda? Medium 1
Do you hold any AWS certifications? Medium 1
During an infrastructure audit, what AWS configurations do you review before approving a production release? Hard 5
EC2 suddenly refuses SSH connections. What do you verify before touching the reboot button? Medium 1
EC2 – Instance types, AMIs, Auto Scaling, Security Groups & Load Balancers Medium 1
Expalin a high scalable application in AWS ? Medium 1
Explain EC2, NAT, and NACL together in an AWS architecture. Hard 1
Explain how Auto Scaling works in AWS. Medium 1
Explain your cloud migration experience from On-Premises to AWS. Medium 1
Explain your experience designing secure AWS infrastructure. Medium 1
Files are accidentally deleted from an S3 bucket. How would you recover them? Medium 1
Have you implemented governance guardrails in AWS Organizations? Medium 1
How can you deploy EC2 instance for fault tolerance and high available applications ? Medium 1
How can you ensure cost efficient storage solution using S3 ? Medium 1
How do you approach AWS cost optimization and identify underutilized resources? Medium 1
How do you connect to an EC2 instance using SSH? Medium 5
How do you create and deploy AWS Lambda functions? Medium 1
How do you create Lambda functions and push artifacts? Medium 2
How do you ensure you are exam-ready for the AWS Developer Associate certification? Medium 1
How do you establish connectivity between on-premises and AWS? Medium 1
How do you expose a web application running on a private EC2 instance to end users? Medium 1
How do you handle an AWS networking issue? Medium 1
How do you implement Load Balancing in AWS? Medium 1
How do you implement Microservices with React and AWS? Medium 1
How do you manage state across AWS accounts/regions? Medium 1
How do you monitor AWS applications? Which tools, metrics, and alerts do you consider essential? Medium 1
How do you perform security assessments in AWS ? Medium 2
How do you prepare for the AWS Developer Associate exam? Medium 1
How do you secure an AWS environment? Medium 1
How do you secure an S3 bucket? Medium 2
How do you securely manage application secrets in AWS? Medium 1
How do you store application data in AWS? Medium 1
How do you troubleshoot an EC2 instance that is unreachable? Medium 2
How do you troubleshoot EC2 SSH connectivity from network to OS permissions? Medium 2
How good are you in AWS? (Self-rating question.) Medium 1
How to provide access to an S3 bucket? Required permissions? Medium 1
How would you access a private EC2 instance if the private PEM key is lost and EC2 Instance Connect is not available? Medium 1
How would you design a highly available and fault-tolerant application architecture on AWS? Hard 2
How would you design minimum downtime web application in AWS Hard 1
How would you enable SSM access for EC2 instances located in private subnets? Medium 1
How would you enforce cloud governance and compliance controls across multiple AWS accounts? Medium 1
How would you handle a sudden increase in AWS traffic? Hard 1
How would you manage different security policies for multiple AWS accounts? Medium 1
How would you manage Infrastructure as Code for 200–300 AWS accounts? Medium 1
How would you optimize AWS costs without impacting performance? Medium 1
How would you protect applications against DDoS attacks in AWS? Medium 1
How would you provide cross-account access to an S3 bucket? Medium 1
I have to deploy an application, In which scenario you will choose EC2 and AWS lambda ? Medium 2
Investigating unexpected AWS costs Medium 2
Is your DevOps experience primarily on AWS or other cloud platforms? Medium 2
Java Full Stack Developer (Java, Spring Boot, Microservices, React, AWS) – Can you explain the differences between microservices and monolithic architecture? Hard 1
Lambda – Serverless architecture, triggers, limits & use cases Hard 1
Lambda — where does it fit compared with EC2/ECS? Medium 1
Legacy application migration to AWS Medium 1
One problem always comes when your AWS costs suddenly get increased, what would you wanna do to cross verify that? Medium 1
Reduce latency for globally distributed users accessing S3 Medium 1
Remote backend & S3 permission errors Medium 1
S3 replication silently failed for 2 days. Who caught it and why? Medium 2
S3 – Storage classes, lifecycle policies, versioning & security Medium 1
Scaling EC2 instances automatically Medium 1
services of the aws cloud what are cloud services in the market? Medium 1
Suppose you have an EC2 instance via SSH, And instance is running, but it is not reachable. So, how are you gonna troubleshoot? Medium 1
Tell me step by step, from basic to end level, how you deploy your Java application on an EC2 server? Medium 2
Unable to connect to EC2 using a PEM key. What would you check? Medium 2
Users report random application failures. Which AWS tools would you use to identify the root cause? Medium 1
What are AWS Regions and Availability Zones? Easy 1
What are spot instances in Ec2 ? Easy 2
What are the different approaches to access an EC2 instance? Easy 1
What are the different AWS services you used? Easy 1
What are the different ways to push artifacts to AWS Lambda? Easy 1
What are the limitations of Lambda functions? Easy 1
What are the major AWS services you have worked on? Easy 4
What are the use cases of S3? Easy 1
What AWS services are you currently using? Medium 2
What AWS services have you used? Explain your experience in detail. Medium 2
What AWS services/tools do you use for security and compliance? Medium 1
What checks would you perform before moving an EC2 instance from C5 to T3 family? Medium 1
What happens when an AWS region goes down ? Medium 2
What happens when an EC2 instance in an Auto Scaling Group becomes unhealthy? Medium 1
What is Amazon S3? Easy 3
What is an Amazon S3 bucket, and what are S3 Lifecycle Policies? Easy 1
What is AWS Lambda? What are its use cases? Easy 1
What is AWS Organizations? Easy 1
What is AWS Transit Gateway? Easy 1
What is AWS, and why do companies use it? Easy 1
What is AWS? Easy 2
What is EC2? Easy 2
What is S3 object size? Easy 1
What is the AWS Shared Responsibility Model? Easy 1
What is the biggest domain in AWS Developer Associate exam? Easy 1
What is the difference between a developer's and an administrator's perspective on AWS services? Medium 1
What is the minimum and maximum object size supported by Amazon S3? Easy 1
What is the use of Rote53 in AWS ? Easy 2
What is User Data in EC2? Easy 1
What metrics would you monitor for an EC2 instance? Medium 1
What percentage of the exam is focused on development with AWS services? Medium 1
What steps would you follow when you are unable to connect to an EC2 instance? Medium 1
Which AWS pricing model should you choose for different workloads? Medium 1
Which AWS resources have you deployed? Medium 1
Which AWS services are you currently using in your project? Medium 1
Which AWS services do you know? Medium 2
Which AWS services have you used extensively? Medium 1
Which AWS services have you worked on and where have you used them? Medium 1
Which AWS tools did you use for cost optimization, and how did you use them? Medium 1
Which cloud are you using & which AWS services are you using? Medium 2
Which cloud platform are you comfortable with (AWS, Azure, or GCP)? Medium 1
Which cloud platform do you prefer working with — AWS or GCP — and why? Medium 1
Why did you choose a particular EC2 instance type (such as R5 or M5) for your worker nodes? How did you justify the decision? Medium 1
Write a Lambda function for any of the use cases you want? Medium 1
Write an example for lambda expression. Medium 3
You are unable to SSH into an EC2 instance, but the instance is running and accessible through the AWS Console. How would you install a required package on that instance without using SSH? Medium 2
You migrated AWS → Azure for cost. How do you prove the cost actually went down? Medium 1
You need to deploy an EC2 instance and an S3 bucket, and output the instance public IP and bucket name. How will you do it? Medium 1
You need to provide access to an Amazon S3 object only to a specific client. How would you implement this securely? How would you ensure no one else can access the object? Hard 2
You need to update an AMI ID of an EC2 instance without downtime. How will you achieve this? Medium 1
Your application needs to be deployed across multiple AWS Regions. What architecture and deployment considerations would you discuss? Hard 1
Your application works correctly in one AWS Availability Zone but fails after traffic moves to another AZ. How would you troubleshoot the infrastructure? Medium 1
Your AWS bill suddenly spikes. How would you find out why? Medium 1
Your S3 bucket uploads suddenly start failing. What possible causes would you investigate? Medium 1

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