Top 50 system design Interview Questions

Implement a cancellable priority queue using a heap and hash map while preserving correct ordering.

system designclean codesoftware engineeringThe Boston Consulting Group

Use topological sorting to find the minimum rounds needed to cover competencies with prerequisite dependencies.

system designbfsData StructuresThe Boston Consulting Group

Parse JSON records, sort per ride by sequence, and merge offline create/update/delete operations into a minimal sync payload.

system designdata synchronizationoffline-firstWaymo

Find the lexicographically smallest pair of payment amounts reaching a target using a hash map in O(n) time.

system designleetcodeAlgorithmsFundbox

Implement bounded undo and redo for a text editor using two history stacks and correct branching behavior.

system designRokt

Tests ownership in system design, especially how you make trade-offs, communicate decisions, and drive measurable outcomes after launch.

system designbackgroundOwnershipTeachableDiversifiedFluency