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Top Array Mastery (Interview Patterns) Interview Questions

A structured, step-by-step roadmap designed to build pattern mastery, prioritizing the most frequently asked questions in top tech interviews.

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Two Sum
Remove Duplicates from Sorted Array
Best Time to Buy and Sell Stock
Maximum Subarray (Kadane's Algorithm)
Medium
Missing Number
Insert Delete GetRandom O(1)
Medium
Find the Winner of an Array Game
Medium
Two Sum II - Input Array is Sorted
Medium
Container With Most Water
Medium
3Sum
Medium
4Sum
Medium
Move Zeroes
Separate Black and White Balls
Medium
Find Polygon With the Largest Perimeter
Medium
Maximum Average Subarray I
Longest Substring with K Distinct Characters
Medium
Minimum Size Subarray Sum
Medium
Longest Repeating Character Replacement
Medium
Count Complete Substrings
Count Subarrays Where Max Element Appears at Least K Times
Medium
Range Sum Query - Immutable
Subarray Sum Equals K
Medium
Product of Array Except Self
Medium
Continuous Subarray Sum
Medium
Plates Between Candles
Medium
Binary Search
Search in Rotated Sorted Array
Medium
Find Minimum in Rotated Sorted Array
Medium
Find Peak Element
Medium
Capacity To Ship Packages Within D Days
Medium
Random Pick with Weight
Medium
Merge Intervals
Medium
Insert Interval
Medium
Non-overlapping Intervals
Medium
Meeting Rooms
Sort Colors
Medium
Divide Intervals Into Minimum Number of Groups
Medium
Set Matrix Zeroes
Medium
Spiral Matrix
Medium
Rotate Image
Medium
Search a 2D Matrix
Medium
Game of Life
Medium
Maximum Product Subarray
Medium
Find Subarray with Zero Sum
Medium
Longest Turbulent Subarray
Medium
Intervals Between Identical Elements
Medium
First Missing Positive
Find All Duplicates in an Array
Medium
Set Mismatch
Minimum Replacements to Sort the Array
Median of Two Sorted Arrays
Sliding Window Maximum
Trapping Rain Water
Largest Rectangle in Histogram