Aws Interview Questions

66 real Aws questions asked in live technical interviews — each with a model answer. Updated weekly.

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Which AWS service is a pull service and which is a push service?🟢 Easy · Conceptual · Asked 4×Is SNS the same as SQS? What is the difference between SNS and SQS?🟢 Easy · Conceptual · Asked 4×What is an IAM role? Why is it required?🟢 Easy · Conceptual · Asked 4×Tell me about the AWS services you have worked on.🟢 Easy · Behavioral · Asked 2×Why was Amazon Redshift used? Could other services like AWS Glue be used instead?🟡 Medium · Conceptual · Asked 1×Which project are you currently working on? Why are you migrating from Azure to AWS? Are you aware of any specific reasons?🟡 Medium · Conceptual · Asked 1×Are you aware of Lambda functions in AWS?🟢 Easy · Conceptual · Asked 1×Which AWS services have you used?🟢 Easy · Conceptual · Asked 1×What file formats does Athena support?🟢 Easy · Conceptual · Asked 1×Which AWS service do you use for data querying and data processing?🟡 Medium · Conceptual · Asked 1×Explain spot architecture.🟡 Medium · Conceptual · Asked 1×Is there a specific purpose for creating AWS Lambda functions? For example, creating a Lambda to move files from one location to another. What other tasks can it perform?🟢 Easy · Conceptual · Asked 1×Avinash, have you created any AWS Lambda functions?🟢 Easy · Behavioral · Asked 1×Explain exactly what AWS Lambda is, and for a specific use case, what did the Lambda function do?🟢 Easy · Conceptual · Asked 1×Have you worked with AWS Lambda? If so, what did you create?🟢 Easy · Behavioral · Asked 1×I have worked on AWS. Which AWS services are you knowledgeable about?🟢 Easy · Conceptual · Asked 1×What is Kinesis Data Streaming?🟢 Easy · Conceptual · Asked 1×Can you describe the project and the architecture you followed for delivering an AWS solution, including data ingestion and transformations?🟡 Medium · Behavioral · Asked 1×Suppose you have a lot of files in a folder in an S3 bucket and want to move all files into a B folder. How would you do that?🟡 Medium · Coding · Asked 1×Which AWS services have you worked on?🟢 Easy · Behavioral · Asked 1×If we have an RDS instance as the source and we decide not to use DMS due to cost concerns, how can we capture CDC data from the RDS instance?🟡 Medium · Conceptual · Asked 1×We are already using DynamoDB Streams. Why do you think we need to use Kinesis Streams again?🟡 Medium · Conceptual · Asked 1×Which AWS services are you familiar with?🟢 Easy · Other · Asked 1×Have you worked with AWS in your experience?🟢 Easy · Behavioral · Asked 1×What is the difference between batch processing and stream processing in AWS?🟡 Medium · Conceptual · Asked 1×How do you handle batch and stream data in AWS?🟡 Medium · Conceptual · Asked 1×Suppose you need to handle real‑time batch processing. How would you handle the data in AWS terms?🟡 Medium · Conceptual · Asked 1×Are you using AWS Step Functions? If you ran into performance issues, how would you optimize?🟡 Medium · Conceptual · Asked 1×Do you have any exposure to AWS services such as Lambda, API Gateway, CloudWatch, and DynamoDB?🟢 Easy · Conceptual · Asked 1×To connect with Athena, which data store would you use?🟢 Easy · Conceptual · Asked 1×Could you tell us about your professional experience, the projects you have worked on, your roles and responsibilities, and your AWS exposure?🟡 Medium · Behavioral · Asked 1×Have you worked on the AWS ecosystem?🟢 Easy · Conceptual · Asked 1×Describe how you would deploy an AWS ecosystem.🟡 Medium · Conceptual · Asked 1×Do you have experience designing end-to-end pipelines in AWS?🟡 Medium · Behavioral · Asked 1×Is AuroraDB a relational database?🟢 Easy · Conceptual · Asked 1×How does AWS Database Migration Service (DMS) work?🟡 Medium · Conceptual · Asked 1×Explain how you performed CDC from Oracle using DMS. Provide an example with a specific table.🟡 Medium · Conceptual · Asked 1×In Amazon Redshift, what is the difference between the serverless and provisioned deployment models?🟢 Easy · Conceptual · Asked 1×Which AWS platform is used to run and transform Spark jobs, and what parameters are required to trigger a Spark transformation?🟡 Medium · Conceptual · Asked 1×Did you use EMR?🟢 Easy · Conceptual · Asked 1×Were there any guidelines for Redshift maintenance, such as do's and don'ts? Are there recommended practices to reclaim space and reduce overhead?🟡 Medium · Conceptual · Asked 1×Did you face any issues or challenges with Redshift? Please share.🟡 Medium · Behavioral · Asked 1×How was PySpark deployed within the AWS environment, and what services were used?🟡 Medium · Conceptual · Asked 1×Explain planning in Amazon Athena.🟢 Easy · Conceptual · Asked 1×Have you worked with Athena? Do you have experience creating tables in Athena?🟢 Easy · Conceptual · Asked 1×What are the limitations and advantages of AWS Lambda compared to AWS Glue?🟡 Medium · Conceptual · Asked 1×Does AWS Lambda have limitations when processing training data larger than 100 MB?🟡 Medium · Conceptual · Asked 1×Can AWS Lambda process 10 GB of data?🟡 Medium · Conceptual · Asked 1×Why can't AWS Lambda replace AWS Glue for larger workloads?🟡 Medium · Conceptual · Asked 1×In a project pipeline that processes data files from various sources, can we replace AWS Glue with AWS Lambda functions?🟡 Medium · Conceptual · Asked 1×Can we replace a Lambda function with Glue?🟡 Medium · Conceptual · Asked 1×Can we replace a Glue function with a Lambda function?🟡 Medium · Conceptual · Asked 1×Why do you use Step Functions?🟡 Medium · Conceptual · Asked 1×How do you copy a file from one S3 location to another S3 location?🟢 Easy · Conceptual · Asked 1×Have you ever optimized EMR cost? How would you optimize cost in EMR?🟡 Medium · Conceptual · Asked 1×Does Lambda allow importing those? Which feature of Lambda functions can be used?🟢 Easy · Conceptual · Asked 1×Which AWS services provide logging capabilities?🟢 Easy · Conceptual · Asked 1×In your primary skills, which languages do you use—Python, SQL, PySpark, AWS—and how would you rate yourself out of 10?🟢 Easy · Behavioral · Asked 1×Do you understand the tech stack? You have experience with Python, SQL, PySpark, and AWS. Is there anything else you'd like to add?🟢 Easy · Conceptual · Asked 1×Help me with an AWS project you have worked on.🟡 Medium · Conceptual · Asked 1×Is there a difference between deploying a zip file directly to AWS Lambda and using that same zip as a Lambda layer? If we are using the same content, what's the difference?🟡 Medium · Conceptual · Asked 1×Are imports handled differently when packaging code into an AWS Lambda layer?🟡 Medium · Conceptual · Asked 1×Can you explain how to create an AWS Lambda layer and provide the steps you have followed in your experience?🟡 Medium · Conceptual · Asked 1×If this is just an experiment, how would you design this Lambda function?🟡 Medium · Conceptual · Asked 1×Are you using any secret manager in your code? Have you used AWS Secrets Manager?🟡 Medium · Conceptual · Asked 1×You mentioned that you used an S3 bucket to write state. Do you know what type of encryption has been used?🟢 Easy · Conceptual · Asked 1×

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