Dataford
Dataford
Top 50
Prep plan
Updated weekly · Last refresh Oct 17

Nokia Data Scientist Interview Questions

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

50questions
~7htotal time
Track your progressSign up free to work through all 50 questions and resume where you left off.
Start practicing free →
1
NLPStart here. 4 questions · ~32 min
Design LLM Agent SystemsHard

Outline how to design an LLM and agent system with retrieval, tool use, evaluation, and safety controls.

Language ModelsText ClassificationTokenizationNokia
More NLP questions with a free account
2
Machine Learning7 questions · ~56 min
Engineer Features for Network FaultsEasy

Design feature engineering for a telecom fault prediction model using operational, alarm, and maintenance data.

Cross-ValidationFeature EngineeringSupervised LearningNokia
More Machine Learning questions with a free account

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
3
Metrics3 questions · ~24 min
Seasonality vs Launch ImpactHard

Separate recurring calendar patterns from true launch impact in a key product metric.

Leading IndicatorsDiagnosisTime SeriesNokia
More Metrics questions with a free account
4
Model Evaluation6 questions · ~48 min
Check for Model OverfittingEasy

How to tell whether a model is overfitting using train and validation performance.

Cross-ValidationF1 ScoreAccuracyNokia
More Model Evaluation questions with a free account
5
Pipelines7 questions · ~56 min
Optimize a Large Data WorkflowMedium

Approach for improving pipeline efficiency while keeping the same business logic and outputs.

InfrastructureETLQualityNokia
More Pipelines questions with a free account
6
A/B Testing & Experimentation5 questions · ~40 min
Test Retention Lift from New FeatureHard

Design an experiment to determine whether a new product feature causes a meaningful retention lift without harming key guardrail metrics.

ExperimentationGuardrail MetricsA/B TestingNokia
More A/B Testing & Experimentation questions with a free account
7
More topics18 questions · ~144 min
Python List IntersectionEasy

Evaluates your practical skills with Python data manipulation.

Data StructurespythonNokia
Role of a Data ScientistEasy

Tests your understanding of how Nokia expects Data Scientists to create value with data and models.

User NeedsValue PropositionProduct VisionNokia
More questions with a free account
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Left Join vs Inner JoinEasy
Practice
Practice drill

Return all Clipboard users and their matching workspace records, showing how unmatched rows differ between join types.

SubqueriesJoinsData WranglingMilwaukee ToolTiger AnalyticsClipboard
Top 3 Outages Per RegionEasy
Practice
Practice drill

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

Window FunctionsRankingAggregationsNokia
SQL Aggregation With JoinsMedium
Practice
Recently asked
Practice drill

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

JoinsGroup BysqlNokia
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.