EXL Service Data Engineer Interview Questions

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

Batch vs Streaming Data Processing

Easy

Compare batch and streaming data processing, including when each fits best in a pipeline.

Stream ProcessingETLBatch Processing

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Resilient ETL Pipeline Design

Medium

Tests your ability to design reliable pipelines with monitoring, retries, and recoverability.

pipeline designresilienceETL

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Window Functions at Scale

Medium

Tests your ability to write efficient analytic SQL that scales to big data.

Window Functionssqloptimization

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Optimize SQL With Joins

Hard

Tests your ability to diagnose and improve SQL performance for large datasets.

Joinssqloptimization

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CTEs and Window Functions Query

Medium

Tests your ability to structure and optimize SQL for maintainability and performance.

Window FunctionsCTEssql

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Unique Letters Python Script

Easy

Tests your ability to implement basic Python logic for data cleaning tasks.

string manipulationpython

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