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Updated weekly · Last refresh Oct 17

Vodafone Data Engineer Interview Questions

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

43questions
~6htotal time
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1
SQL & Data ManipulationStart here. 8 questions + 2 drills · ~87 min
Top 3 Customers by Monthly UsageMedium
Practice

Write a SQL query to find the top 3 customers with the highest data usage per month over the last year at Vodafone. Use the provided Vodafone customer, acc...

Window FunctionsDate FunctionsJoinsVodafone
SQL vs NoSQL DifferencesEasy

Explain how SQL and NoSQL databases differ in data model, schema, consistency, and scaling, and when to choose each.

nosqlJoinsData WranglingVodafone
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
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
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2
Pipelines22 questions · ~183 min
Data Integrity During System MigrationHard

Approach for preserving correctness during a pipeline migration, including validation, replay safety, and controlled cutover.

ETLIdempotencyQualityVodafone
Design an ETL Pipeline for Large DatasetsMedium

Design an ETL pipeline to process 10TB of data daily from multiple sources into a data warehouse with strict data quality checks.

InfrastructureETLData ModelingVodafone
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3
System Design3 questions · ~25 min
Real-Time Ingestion on CloudHard

Evaluates real-time architecture and cloud-based design choices.

data ingestionCloudVodafone
On-Prem to Cloud Data Warehouse MigrationMedium

Tests migration strategy and cloud architectural decisions.

data warehousearchitectureVodafone
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4
Behavioral & Leadership8 questions · ~67 min
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5
More topics2 questions · ~17 min
Tools and Technologies for Scalable PipelinesEasy

Assesses breadth of data engineering toolchain and scalability focus.

Toolsdata pipelinesVodafone
Python for Data EngineeringEasy

Tests practical Python skills for data transformation and integration with Spark-based workflows.

Hash TablesArraysSortingVodafone
The finish line: interview-readyComplete all 43 questions plus 2 hands-on drills to finish this plan.