Data Ingestion Interview Questions

15 real Data Ingestion questions asked in live technical interviews — each with a model answer. Updated weekly.

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These Data Ingestion interview questions were captured from real interviews by candidates using Assisting AI. Each links to a full model answer. For real-time help during your own interview, get Assisting AI from ₹500/day.

Suppose you need to ingest data from an API service into a data lake, build a medallion architecture data bridge, and then make it available for API consumption in tabular form. How would you approach this typical data ingestion and data modeling exercise?🟡 Medium · Conceptual · Asked 1×I have a source table in Oracle that has no key constraints or primary key. Can I ingest data from this table to Snowflake using Python, and how would I handle the lack of a primary key?🟡 Medium · Conceptual · Asked 1×When ingesting data, if the source table has no primary key, is it mandatory to externally define primary key columns in the target, or can we ingest without them?🟡 Medium · Conceptual · Asked 1×I have experience working with Python. Can you explain the configuration steps required to onboard new Oracle tables and ingest them into Snowflake using Python? What considerations are there for the source and target configurations?🟡 Medium · Conceptual · Asked 1×Suppose we are re-ingesting some source data that is about 100 to 200 GB in size and we call the collect() function. What problems can arise from this?🟡 Medium · Conceptual · Asked 1×Suppose we need to pull data from an external server. As part of a business proposal, how would you write a REST API function for data ingestion? What would the REST API configuration look like? From a developer's perspective, what prerequisites would you ask the team to provide before starting?🟡 Medium · Conceptual · Asked 1×Do you generally configure Snowpipe? If you want to ingest files automatically into a table, do you set up Snowpipe?🟡 Medium · Conceptual · Asked 1×Where does Snowpipe ingest data from? If it’s FTP or cloud storage using an API, how do you pull the data?🟡 Medium · 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×I understand that CSV files are coming into an S3 bucket. What changes are needed to handle this situation?🟡 Medium · Conceptual · Asked 1×Explain the high‑level data flow when accessing data from a CRM system: from database extraction, file ingestion, raw storage, to data curating.🟡 Medium · Conceptual · Asked 1×In Target, what format is used for test reading?🟢 Easy · Conceptual · Asked 1×Does cataloging help for data ingestion?🟢 Easy · Conceptual · Asked 1×We process a large amount of data daily, receiving files every second or minute. We currently move files to another folder or bucket. Is there an optimized solution for this file transfer?🟡 Medium · Conceptual · Asked 1×You must implement near‑real‑time ingestion from S3 with schema drift (occasional new columns) while avoiding full listings of the bucket. Badly formed records should land in a quarantine column for triage.🟡 Medium · Conceptual · Asked 1×

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