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WebMD Health Software Engineer Interview Questions

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

Linked List ReversalEasy

Tests basic coding ability and pointer/data-structure manipulation.

RecursionLinked ListsArrays
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Implement LRU Cache
Medium

Problem Design a data structure that implements an LRU (Least Recently Used) cache. The cache should support the following operations: - get(key): Retrieve...

Hash TablesQueueLinked Lists
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Abstract Classes vs Interfaces
Medium

Tests your grasp of OOP design concepts and when each construct is appropriate.

abstraction
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Dependency Injection Role
Medium

Tests understanding of DI patterns and how they improve modularity, testability, and maintainability.

design patternsarchitecturedependency injection
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UNION vs UNION ALL UsageEasy

Explain how UNION and UNION ALL differ when combining result sets, especially around duplicate handling and performance.

Data WranglingperformanceUnions
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Optimize SQL Query Performance
Hard

Tests your ability to diagnose and improve SQL performance in production data systems.

Joinsindexesquery optimization
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API Performance Tuning
Medium

Assesses your approach to diagnosing and improving API performance in production systems.

Performance Tuningapioptimization
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API Rate Limiting Implementation
Medium

Tests your ability to protect services from abuse while maintaining predictable performance.

Trade-offsSuccess CriteriaRisk Assessment
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