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Updated weekly · Last refresh Aug 30

L&T Technology Services Data Engineer Interview Questions

The questions to prepare for a L&T Technology Services Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

12questions
~2htotal time
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1
SQL & Data ManipulationStart here. 7 questions + 3 drills · ~86 min
Scalable Data Model DesignMedium

Tests data modeling fundamentals and scalability considerations from requirements to implementation.

scalabilitydesign processData ModelingL&T Technology Services
Choosing Data Warehousing StrategiesMedium

Tests understanding of warehousing patterns and decision-making based on workload and constraints.

strategiesL&T Technology Services
SOX-Compliant Change RequestsHard

Tests SOX-aware change management practices and audit-ready controls for data systems.

data integrityL&T Technology Services
Snowflake Performance OptimizationMedium

Tests Snowflake architecture knowledge and performance tuning for large-scale data workloads.

performance optimizationdata architectureL&T Technology Services
Complex SQL and Stored ProceduresMedium

Tests advanced SQL development and stored procedure design for reliable data transformations.

stored proceduresL&T Technology Services
Zero Downtime Change ManagementHard

Tests release engineering discipline and techniques to prevent downtime during production changes.

processzero downtimeL&T Technology Services
SQL Duplicate Record DetectionEasy
Practice
Practice drill

Find duplicate American Institutes for Research assessment submissions using a CTE, GROUP BY, HAVING, and joins.

deduplicationsqldata integrityAmerican Institutes for ResearchMacy's
Contact Center Agent Performance MetricsHard
Practice
Practice drill

Compute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.

ETLAggregationsData ModelingADP
Impute Sparse Assessment ScoresHard
Practice
Practice drill

Use CTEs, joins, CASE, and null handling to clean sparse assessment scores and impute missing values per question.

null handlingData Wranglingdata integrityMercor
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2
Behavioral & Leadership5 questions · ~40 min
Agile Delivery with DocumentationMedium

Tests ability to deliver iteratively while maintaining compliance-grade documentation.

alignmentdocumentationL&T Technology Services
Communicating Impact to BusinessMedium

Tests communication clarity and stakeholder management during technical incidents.

Stakeholder ManagementCommunicationL&T Technology Services
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The finish line: interview-readyComplete all 12 questions plus 3 hands-on drills to finish this plan.