45.Find Intersection of Two Arrays in Python | Optimized for Interviews
In this tutorial, you’ll learn how to find the intersection of two arrays in Python — including duplicates — using an optimized frequency map approach.
Unlike the basic set solution, this method is more efficient and interview-friendly, since it always builds the frequency dictionary from the smaller array, reducing memory usage.
👉 What you’ll learn:
How to handle duplicates in intersections
Why building frequency from the smaller array is optimal
Dry-run explanation for clarity
Time & space complexity breakdown
💡 Perfect for coding interviews, LeetCode, and competitive programming.
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