Nokia Data Engineer Interview Questions

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

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SQL & Data ManipulationStart here. 6 questions + 1 drill · ~64 min

Use ROW_NUMBER and outage durations to return the three longest completed Nokia NetAct outages in each region.

Optimizing Slow Join QueriesHard

Tests your approach to diagnosing and optimizing join-heavy SQL workloads at scale.

Joinsquery optimizationAggregations

Nokia

Join bug tables and aggregate report counts by product and severity.

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Coding13 questions · ~118 min

Merge two sorted Nokia NetAct time series with deterministic duplicate handling using two pointers.

Choosing a Data StructureEasy

Explain why a specific data structure fits transformation logic, including lookup patterns, update costs, and complexity tradeoffs.

Hash TablesArraysData Wrangling

Nokia

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Pipelines13 questions · ~118 min

Design IoT Device Tracking ModelMedium

Design a pipeline-friendly data model for an IoT device tracking system, with streaming ingestion, evolving schemas, and quality controls.

ETLData ModelingQuality

Nokia

Mitigate Spark Skew in Delta PipelinesEasy

Design a Databricks Delta pipeline that detects and mitigates Spark data skew in large joins and aggregations while meeting a 20-minute hourly SLA.

Nokia

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Behavioral & Leadership12 questions · ~109 min

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