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Prep plan
Updated weekly · Last refresh Oct 17

The Trade Desk Software Engineer Interview Questions

The questions to prepare for a The Trade Desk Software Engineer interview. Questions from real interview reports rank first. Updated daily.

50questions
~9htotal time
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1
CodingStart here. 17 questions · ~183 min
LRU and MRU Coding TaskMedium
Practice

Simulate LRU and MRU cache eviction in O(1) per operation using a hash map and doubly linked list.

cacheThe Trade Desk
N-Way Set Associative Cache ExerciseMedium
Practice

Simulate an N-way set associative cache with per-set LRU eviction and constant-time lookups.

cacheThe Trade Desk
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2
Execution6 questions · ~65 min
Prioritize Across Concurrent Research StreamsEasy

Explain how you prioritize work across multiple simultaneous projects with shared people, conflicting stakeholder pressure, and uneven urgency.

Trade-offsRoadmappingScope ManagementThe Trade Desk
Describe a Challenging ProjectEasy

Share a challenging project, your role, the risks and trade-offs you managed, and the final outcome.

Trade-offsRoadmappingRisk AssessmentThe Trade Desk
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3
System Design17 questions · ~183 min
Banking System Design to Top-K RankingHard

Assesses your ability to evolve a system design from core transactions to advanced features.

The Trade Desk
Architect Back End of WebsiteMedium

Evaluates your ability to design and explain a backend architecture.

architectureThe Trade Desk
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4
Pipelines4 questions · ~43 min
Scaling Microservices ArchitectureHard

Tests your knowledge of microservices scaling, reliability, and operational complexity.

InfrastructureIdempotencyDependenciesThe Trade Desk
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5
Behavioral & Leadership4 questions · ~43 min
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6
More topics2 questions · ~22 min
Distributed People and Events QueryMedium

Assesses distributed data access thinking and ability to translate requirements into code.

databaseThe Trade Desk
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.