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Incremental Load Interview Questions

9 real Incremental Load questions asked in live technical interviews — each with a model answer. Updated weekly.

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You have a source table with 1 billion records. You don't want to reload everything every day. How would you design an incremental load strategy?🟡 Medium · System Design · Asked 1×List all the columns that are required for managing or maintaining an incremental data load.🟡 Medium · Conceptual · Asked 1×Build an incremental load pipeline for a source that also sends late-arriving records, and the business wants the pipeline to be idempotent with no duplicate output. How would you design the watermarking, partitioning, and deduplication strategy?🟡 Medium · System Design · Asked 1×How would you design an incremental load in a standard data pipeline?🟡 Medium · Conceptual · Asked 1×How would you configure incremental loading for five tables while the remaining five tables use full refresh?🟡 Medium · Conceptual · Asked 1×Given the services mentioned, here's a scenario: We have data in either an RDS instance or DynamoDB. We need to load it into Snowflake at regular intervals in an incremental manner. How would you do this?🟡 Medium · System Design · Asked 1×What is incremental loading?🟢 Easy · Conceptual · Asked 1×Describe a pipeline that picks data from a MySQL database and loads incremental data into AWS Redshift based on a defined CID.🟡 Medium · System Design · Asked 1×Suppose you are creating ETL pipelines that perform incremental loads. You have access to an S3 bucket where files are placed at regular intervals. How would you design the pipeline so that it automatically triggers on the latest file without performing a full load?🟡 Medium · Conceptual · Asked 1×

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