Idexcel Data Engineer Interview Questions

The questions to prepare for a Idexcel Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

Production Pipeline Quality Monitoring

Medium

Approach for adding data quality checks, observability, and production monitoring to a data pipeline.

Data Qualitymonitoringobservability

Idexcel

Data Quality and Schema Evolution

Medium

Approach for handling schema changes and data quality checks in a high-volume data lake pipeline.

schema evolutionData ModelingQuality

Idexcel

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Ranking Trial Results with Window Functions

Easy

Explain how RANK(), DENSE_RANK(), and ROW_NUMBER() differ when ordering tied clinical trial results.

Window FunctionsRankingData Wrangling

Idexcel

Clustered vs Non-Clustered Indexes

Medium

Explain how clustered and non-clustered indexes differ in storage, lookup behavior, and query performance.

JoinsData Wrangling

Idexcel

Deduplicate Without Primary Key

Medium

Tests your ability to remove duplicates using SQL patterns like window functions.

Window Functionsdeduplicationnull handling

Idexcel

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Merge Two Sorted Lists

Easy

Tests core algorithm implementation for ordered data in Python.

ArraysSortingpython

Idexcel

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