Data Quality Interview Questions

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

🎤 Auto-captured by Assisting AI during live interviews

These Data Quality 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.

Can you tell me how you perform data reconciliation?🟡 Medium · Conceptual · Asked 22×After performing transformation, do you check whether the destination target has all data present?🟡 Medium · Conceptual · Asked 1×The previous version of the data is gone. We have a new version of the data, but it is incorrect. We cannot give it to downstream systems or the business.🟡 Medium · Conceptual · Asked 1×I have performed data loads using full load and truncated load. During data quality checks and post‑validation checks, I analyzed and found that the data was incorrectly loaded.🟡 Medium · Conceptual · Asked 1×Let's say a data load has occurred but the data was loaded incorrectly. How would you identify and correct the issue?🟡 Medium · Debugging · Asked 1×Do you have an understanding of sensor data? How would you test the quality of sensor data to ensure there are no duplicates?🟡 Medium · Conceptual · Asked 1×Suppose we have some records that do not match the expected schema, containing null or invalid price values. How would you separate bad records to ensure only valid data is loaded for valuation?🟡 Medium · Conceptual · Asked 1×Why might data quality checks fail silently?🟡 Medium · Debugging · Asked 1×A Bronze to Silver pipeline needs data quality rules that drop invalid rows yet record metrics for monitoring. Stakeholders want declarative checks and managed lineage without hand‑coding UDF logic. What should you choose?🟡 Medium · Conceptual · Asked 1×A Bronze-to-Silver pipeline requires data quality rules that drop invalid rows while recording metrics for monitoring. Stakeholders want declarative checks and managed lineage without hand‑coding UDF logic. Which option should you choose?🟡 Medium · Conceptual · Asked 1×We have three successful records. If we ignore one sent record, will the total count be four?🟡 Medium · Conceptual · Asked 1×Assume a pipeline suddenly processes duplicate records for two days. How would you detect and fix this issue? What approach would you take?🟡 Medium · Conceptual · Asked 1×

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