Aws S3 Interview Questions

14 real Aws S3 questions asked in live technical interviews — each with a model answer. Updated weekly.

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You are rolling out Unity Catalog across multiple workspaces on AWS. Teams need centralized governance for external data in S3 and want cluster isolation aligned with Unity Catalog. What is the correct baseline configuration?🟡 Medium · Conceptual · Asked 2×What type of encryption is used in an S3 bucket?🟢 Easy · Conceptual · Asked 2×Have you used AWS S3 for storage? What types of S3 storage classes are available?🟢 Easy · Conceptual · Asked 1×In a workflow automation scenario, code is picked from a repository stored in an S3 location and then execution starts. Suppose a developer has just pushed changes. Can you walk through the steps that make the code available in the target environment?🟡 Medium · Conceptual · Asked 1×Are you aware of any cloud services such as S3 and Azure?🟢 Easy · Conceptual · Asked 1×I have some CSV files located in an S3 bucket. I want to convert all CSV files to Parquet to save cost and improve performance. What approach should I use?🟡 Medium · Conceptual · Asked 1×Write a Python code block that calls a REST API endpoint, receives a JSON response, and uploads a file to an S3 bucket.🟡 Medium · Coding · Asked 1×Which data model would you use for large datasets stored in Amazon S3?🟡 Medium · Conceptual · Asked 1×Suppose 100 GB of files arrive in an S3 bucket every day and need to be processed and loaded into a data warehouse. Which AWS services would you use and why? Consider factors such as flexibility, cost, scalability, and error recovery.🔴 Hard · System Design · Asked 1×Did you manually connect a Spark job to an S3 bucket?🟡 Medium · Conceptual · Asked 1×Can you tell about your S3 setup? Did you organize buckets and folders? What file format did you use? Did you use partitioning in the S3 bucket?🟡 Medium · Conceptual · Asked 1×I understand that CSV files are coming into an S3 bucket. What changes are needed to handle this situation?🟡 Medium · Conceptual · Asked 1×How does the bridge between the raw S3 bucket and the first Lambda function work, and how is the second Lambda function triggered by an event?🟡 Medium · Conceptual · Asked 1×How does the bridge between the raw S3 bucket and the first Glue job work, and how does the first Glue job trigger the second Glue job? What events are involved?🟡 Medium · Conceptual · Asked 1×

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