Dataford
Top 33
Prep plan
Updated weekly · Last refresh Aug 30

Freecharge Data Engineer Interview Questions

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

33questions
~5htotal time
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1
SQL & Data ManipulationStart here. 17 questions + 1 drill · ~158 min
Nth Highest Salary QueryEasy
Practice

Find all active Freecharge employees at the third-highest distinct salary using DENSE_RANK and a department join.

sql querydatabase queryingFreecharge
Second-Highest Transaction Amount QueryMedium
Practice

Find the second-highest distinct transaction amount using a subquery in PostgreSQL without LIMIT.

SubqueriesRankingsalaryFreecharge
Join Types With Real-World Example (Duplicate)Medium

Tests join correctness using a scenario-based understanding of matching and non-matching rows.

sql basicsJoinsFreecharge
Optimize Slow SQL QueriesMedium

Tests query tuning skills using execution plans, indexing, and rewrite strategies.

Performance Tuningquery optimizationdatabasesFreecharge
Advanced SQL With PartitionsHard
Practice
Practice drill

Use CTEs, aggregations, and window functions to compare gender pay and find each department's second-highest salary.

Window FunctionsJoinssqlMeesho
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2
Pipelines7 questions · ~61 min
Debugging a Failing PipelineMedium

Tests systematic troubleshooting, observability, and root-cause analysis for pipeline failures.

data pipelineProblem SolvingDebuggingFreecharge
Pipeline for Promotional Traffic SpikesHard

Tests scalability and resilience planning for bursty loads in Freecharge data pipelines.

data pipelinecloud architecturescalabilityFreecharge
Scalable Data Architecture ConsiderationsHard

Tests ability to design for growth across ingestion, storage, processing, and reliability.

scalabilitydata architectureCloudFreecharge
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3
Behavioral & Leadership9 questions · ~79 min
Using SQL in Past ProjectsMedium

Tests practical SQL usage, complexity handling, and real project relevance.

project experiencesql experiencetechnical discussionFreecharge
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The finish line: interview-readyComplete all 33 questions plus 1 hands-on drill to finish this plan.