Two Sigma

Typical loop

1. 1Recruiter screen
2. 2Online assessment
3. 3Technical phone screen: algorithms and statistics
4. 4Onsite: coding, modeling, and systems rounds
5. 5Final round with researchers and engineers

Questions

Callback's practice questions and the LeetCode questions Two Sigma has been asking, filtered together.

Asked on LeetCode

19 questions · all time

• Random Pick with WeightmediumArrayMathBinary SearchPrefix Sum+1frequency 100.0
• Maximum Subarray Sum with One DeletionmediumArrayDynamic Programmingfrequency 93.2
• Number of ProvincesmediumDepth-First SearchBreadth-First SearchUnion-FindGraph Theoryfrequency 93.2
• Game of LifemediumArrayMatrixSimulationfrequency 90.4
• Intersection of Two ArrayseasyArrayHash TableTwo PointersBinary Search+1frequency 90.4
• Longest String ChainmediumArrayHash TableTwo PointersString+2frequency 90.4
• Maximum Sum Circular SubarraymediumArrayDivide and ConquerDynamic ProgrammingQueue+1frequency 90.4
• Multiply StringsmediumMathStringSimulationfrequency 90.4
• Power of FoureasyMathBit ManipulationRecursionfrequency 90.4
• Wildcard MatchinghardStringDynamic ProgrammingGreedyRecursionfrequency 90.4
• Parallel Courses IIIhardArrayDynamic ProgrammingGraph TheoryTopological Sort+1frequency 83.6
• Word Search IIhardArrayStringBacktrackingTrie+1frequency 83.6
• Design Memory AllocatormediumArrayHash TableDesignSimulationfrequency 67.3
• Merge k Sorted ListshardLinked ListDivide and ConquerHeap (Priority Queue)Merge Sort+1frequency 67.3
• Minimum Space Wasted From PackaginghardArrayBinary SearchSortingPrefix Sumfrequency 67.3
• Valid ParentheseseasyStringStackBracket Sequencesfrequency 67.3
• House Robber IIImediumDynamic ProgrammingTreeDepth-First SearchBinary Tree+1frequency 57.7
• Meeting Rooms IImediumArrayTwo PointersGreedySorting+2frequency 57.7
• Number of IslandsmediumArrayDepth-First SearchBreadth-First SearchUnion-Find+1frequency 57.7