HCLTech Data Engineer Interview Questions
The questions to prepare for a HCLTech Data Engineer interview. Questions from real interview reports rank first. Updated daily.
Use PostgreSQL MERGE to update existing catalog items and insert new staged items without duplicate source matches.
HCLTechExplain the differences between WHERE and HAVING clauses in SQL and when to use each.
HCLTechExplain Databricks cluster types, control and data plane architecture, and the role of Databricks Runtime.
HCLTechDesign and implement a configurable metadata-driven pipeline with validation, orchestration, lineage, and reliable failure recovery.
HCLTechRemove duplicate dictionary records in O(n) time while preserving the first occurrence of each record.
HCLTechDiscuss Python scripting experience for ETL, orchestration, and data quality tasks in data pipelines.
HCLTechDesign and implement SCD Type 1 and Type 2 dimensions with history tracking, idempotent loads, and data quality controls.
HCLTechSecure Azure connection strings and authentication details with Key Vault, managed identity, least privilege, rotation, and monitoring.
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