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Updated weekly · Last refresh Nov 13

ByteDance Mobile Engineer Interview Questions

The questions to prepare for a ByteDance Mobile Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
CodingStart here. 9 questions · ~170 min
Fix an Almost Sorted ArrayMedium
Practice

Restore an array where each value is at most k positions from its sorted position using a min-heap.

ArraysArray ManipulationAlgorithmsByteDance
Binary Tree Construction IntegrityMedium
Practice

Find the root of shuffled binary-tree nodes while rejecting cycles, shared children, duplicate IDs, and disjoint components.

dfsAlgorithmsByteDance
Merge Sort from ScratchMedium
Practice

Implement stable bottom-up merge sort from scratch using iterative passes over an integer array.

ArraysArray ManipulationAlgorithmsByteDance
Minimum Window for Target DifferenceMedium
Practice

Use two pointers to find the shortest sorted subarray whose range reaches the target.

ArraysArray ManipulationAlgorithmsByteDance
Parsing Nested JSONMedium
Practice

Flatten nested JSON objects into dot and index paths using recursive depth-first traversal.

json parsingpythonByteDance
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2
Behavioral & Leadership3 questions · ~57 min
Building Alignment Across Resistant StakeholdersMedium

Tests influence, stakeholder management, communication, and ownership when the candidate lacks formal authority.

account executiveLeadershipbehavioral interviewByteDance
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3
More topics2 questions · ~38 min
Anonymous Group MessagingHard

Design an anonymous group messaging app with per-group identities, client-side privacy, reliable delivery, and ML-assisted abuse prevention.

data securitymobile architecturefailure modesByteDance
WhatsApp-Scale Real-Time Chat SystemHard

Design the ML and mobile architecture for realtime WhatsApp chat, groups, contacts, images, and stickers.

mobile architecturedistributed systemsoffline syncByteDance

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