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Top 12
Prep plan
~2h total · Updated weekly · Last refresh Aug 9

TikTok Backend Engineer Interview Questions

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

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Design URL Shortening or NotificationsHard

Tests system design fundamentals across scalability, reliability, and API/service boundaries.

system designnotification system
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Arrays or Linked Lists Algorithm
Medium

Tests practical algorithmic problem-solving for common data structures.

Linked ListsArrays
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Dynamic Programming or Graph Hard Problem
Hard

Tests advanced reasoning for DP or graph algorithms and correctness under complexity constraints.

Dynamic Programming
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Backend Rendering and Errors
Medium

Tests reliability and resilience practices for backend request handling and failure modes.

error handling
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Caching and Global Load Balancing
Hard

Assesses performance engineering for global traffic, caching, and load distribution.

cachingload balancing
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Thread Safety and Locks
Hard

Evaluates concurrency control knowledge and correctness under parallel execution.

thread safety
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SQL vs NoSQL Trade-offsEasy

Explain SQL vs NoSQL trade-offs, including schema design, consistency, scaling, and query flexibility.

JoinsData WranglingAggregations
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Database Sharding and Sync
Hard

Evaluates data partitioning and consistency strategies in distributed backend systems.

synchronizationdistributed systems
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