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Updated weekly · Last refresh Aug 30

Jio Data Engineer Interview Questions

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

38questions
~5htotal time
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1
CodingStart here. 3 questions · ~26 min
Longest Substring Without RepeatsMedium
Practice

Find the longest substring with all unique characters using a sliding window.

Hash TablesStringsTwo PointersJio
Efficient Data Retrieval StructuresMedium

Tests ability to design data structures for performance and query efficiency.

Hash TablesSearchingTreesJio
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2
Pipelines28 questions · ~238 min
Batch vs Stream Processing Trade-offsMedium

Compare batch and stream processing across latency, complexity, cost, and data quality in a modern analytics pipeline.

InfrastructureStream ProcessingETLJio
Structured vs Unstructured DataEasy

Explain how structured and unstructured data differ, and why that matters for pipeline design and downstream processing.

ETLData ModelingQualityJio
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityJio
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3
SQL & Data Manipulation6 questions + 3 drills · ~81 min
Understanding Common Table Expressions (CTEs)Medium

Explain what CTEs are and their advantages in SQL queries.

CTEsJio
SQL Aggregation and TransformationMedium

Tests practical SQL skills for transforming and aggregating data.

Data WranglingGroup ByAggregationsJio
Optimize Large Query PerformanceHard

Tests SQL performance tuning skills on large-scale data workloads.

JoinsData WranglingindexesJio
January Shopper Retention RateMedium
Practice
Practice drill

Calculate January cohort retention using date filtering and aggregate counts on a single shoppers table.

Date FunctionsJoinsAggregationsInstacartUber
Top Customers by Sales RevenueEasy
Practice
Practice drill

Use GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.

RankingGroup ByAggregationsHousecall ProEquifaxXYZ
Top 3 Highest Paid EmployeesEasy
Practice
Practice drill

Find Jio's three highest-paid employees using descending salary order and LIMIT.

sqlAggregationsJio
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4
More topics1 question · ~9 min
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The finish line: interview-readyComplete all 38 questions plus 3 hands-on drills to finish this plan.