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NTT DATA Data Engineer Interview Questions

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

30questions
~4htotal time
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1
SQL & Data ManipulationStart here. 6 questions + 2 drills · ~74 min
Second Highest Without AggregatesHard
Practice

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsNTT DATA
Window Ranking in Ticket QueuesMedium

Explain SQL window functions and when to use ROW_NUMBER() versus DENSE_RANK() for ranked ticket analysis.

Window FunctionsRankingrow_numberNTT DATA
Explain Full Outer vs Left JoinMedium
Recently asked

Explain how FULL OUTER JOIN and LEFT JOIN differ when reconciling customer records across systems.

JoinsData WranglingCase WhenNTT DATA
Monthly Revenue Running Totals by RegionMedium
Practice
Practice drill

Use joins, monthly aggregation, and window functions to compute running revenue totals and customer rank by region.

Window FunctionsRankingRunning TotalsNTT DATAAppfolio
Deduplicate and Keep LatestEasy
Practice
Practice drill

Keep the latest valid Gartner Peer Insights review per source key using ROW_NUMBER and deterministic tie-breaking.

Window FunctionsRankingData WranglingGartner
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2
Pipelines4 questions · ~36 min
Real-Time ETL to Cloud LakeHard

Tests your ability to design scalable streaming ingestion and reliable ETL for enterprise data platforms.

Stream ProcessingETLCloudNTT DATA
Scalability, Orchestration ToolsHard

Tests ability to discuss pipeline scalability and orchestration tooling.

scalabilityOrchestrationNTT DATA
Job, Stage, Task DifferencesMedium

Assesses ability to reason about execution units in distributed data pipelines.

NTT DATA
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3
Behavioral & Leadership18 questions · ~161 min
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4
More topics2 questions · ~18 min
First Unique Element IndexEasy
Practice

Use a hash table frequency count to return the index of the first unique element in an array.

Basic AlgorithmsloopsData StructuresNTT DATA
SQL and Python BasicsEasy

Tests baseline coding and query fundamentals for data engineering.

sqlpythonNTT DATA

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