CrowdStrike
Security loops pairing systems coding with threat-detection reasoning and design questions about telemetry at scale.
Typical loop
- 1Recruiter screen
- 2Technical phone screen
- 3Onsite: coding and security-reasoning rounds
- 4Architecture and threat-modeling round
- 5Behavioral round
Questions
Callback's practice questions and the LeetCode questions CrowdStrike has been asking, filtered together.
Asked on LeetCode
11 questions · all time
- String CompressionmediumTwo PointersStringfrequency 100.0
- Number of IslandsmediumArrayDepth-First SearchBreadth-First SearchUnion-Find+1frequency 96.8
- Encode and Decode StringsmediumArrayStringDesignfrequency 88.7
- Merge IntervalsmediumArraySortingQuicksortfrequency 76.5
- Clone GraphmediumHash TableDepth-First SearchBreadth-First SearchGraph Theoryfrequency 66.8
- Course SchedulemediumDepth-First SearchBreadth-First SearchGraph TheoryTopological Sort+1frequency 66.8
- Group AnagramsmediumArrayHash TableStringSortingfrequency 66.8
- Squares of a Sorted ArrayeasyArrayTwo PointersSortingfrequency 66.8
- Time Based Key-Value StoremediumHash TableStringBinary SearchDesignfrequency 66.8
- Trapping Rain WaterhardArrayTwo PointersDynamic ProgrammingStack+1frequency 66.8
- Valid ParentheseseasyStringStackBracket Sequencesfrequency 66.8