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The 8 Core DSA Patterns
Master the 8 pattern families that cover 98% of coding interview questions at top tech companies. Pattern recognition is the single highest-leverage skill for coding interviews.
35 min read 2 sections 1 interview questions
ArraysGraphsDynamic ProgrammingBinary SearchHeapSliding WindowTwo PointersMonotonic StackPrefix SumUnion Find
Why Patterns Matter
Coding interviews test pattern recognition, not memorization. There are thousands of LeetCode problems, but they all reduce to a small set of core patterns.
Once you internalize these 8 families, you can recognize the right approach within the first 2 minutes of reading a problem. This is how top candidates at Google and Meta consistently solve hard problems under pressure.