Data Quality & Validation

Catching bad data before it reaches downstream consumers — schema checks, freshness, and anomaly detection.

Read

29 min

Practice MCQs

25

Interview QA

25

Edition

v4

Editorial status

Reviewed

Relevant for

Data Architect,Data Engineer,Forward Deployed Engineer (FDE)

Scope: Great Expectations, dbt, Deequ, OpenLineage 1.53, JSON Schema 2020-12, and OpenAPI current 2026-08-31.