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Updated weekly · Last refresh Aug 30

Proxiad Software Engineer Interview Questions

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

29questions
~4htotal time
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1
CodingStart here. 11 questions · ~96 min
Design Patterns in OOPMedium

Explain design patterns and discuss when to use Singleton or Factory to solve object-oriented design problems.

abstractionfunctionsoopProxiad
Object-Oriented vs Functional ProgrammingEasy

Compare object-oriented and functional programming in terms of state, abstraction, side effects, and design tradeoffs.

LanguagestechnicalProgrammingProxiad
Understanding Multithreading in JavaMedium

Explain the concept of multithreading in Java, including its benefits and challenges.

Proxiad
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2
Behavioral & Leadership13 questions · ~113 min
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3
More topics5 questions · ~43 min
Advanced SQL Query WritingHard

Tests your ability to craft correct and efficient SQL for non-trivial data retrieval tasks.

SubqueriesJoinsAggregationsProxiad
Scalable Microservices DesignHard

Tests your ability to design resilient, scalable services aligned with high-traffic production needs.

Trade-offsExecutionRoadmappingProxiad
Spring Web Request FlowMedium

Tests understanding of Spring Web request handling and core components.

Proxiad
High Availability and SeparationHard

Tests your architectural thinking for reliability and maintainability in real client delivery.

Trade-offsRisk AssessmentarchitectureProxiad
Indexing and Query OptimizationMedium

Tests your skill in diagnosing query performance issues and applying indexing and tuning strategies.

null handlingperformancedimensionsProxiad

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Analyzing Operations Bottlenecks with SQLHard
Practice
Practice drill

Use multi-level CTEs, joins, and LAG to identify Samsung regional inventory shortages and late deliveries.

JoinsperformanceAggregationsSamsung ElectronicsApeel Sciences
Top Customers by Net SalesMedium
Practice
Practice drill

Compute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.

SubqueriesJoinsData WranglingGain DigitalTCSZest AI
Unify CRM and Google Analytics ViewHard
Practice
Practice drill

Merge CRM orders with GA events via an identity map to build a customer-level view using joins, window functions, and monthly rollups.

SubqueriesJoinsData WranglingArtefact
The finish line: interview-readyComplete all 29 questions plus 3 hands-on drills to finish this plan.