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Data Modelling & AIData Structure & Algorithm

Top 50 Array Coding Problems for Interviews

Shaida Kate Naidoo
By Shaida Kate Naidoo
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Here is the collection of the Top 50 list of frequently asked interviews question on arrays. Problems in this Article are divided into three Levels so that readers can practice according to the difficulty level step by step. 
 

Top-50-Array-Coding-Problems-for-Interviews

Level 1

Problems

Solve
Find a peak element which is not smaller than its neighbors Solve
Find the minimum and maximum element in an array Solve
Write a program to reverse the array Solve
Write a program to sort the given array Solve
Find the Kth largest and Kth smallest number in an array Solve
Find the occurrence of an integer in the array Solve
Sort the array of 0s, 1s, and 2s Solve
Subarray with given Sum Solve
Move all the negative elements to one side of the array Solve
Find the Union and Intersection of the two sorted arrays Solve

Level 2

Problems

Solve
Write a program to cyclically rotate an array by one Solve
Find the missing integer Solve
Count Pairs with the given sum Solve
Find duplicates in an array Solve
Sort an Array using the Quicksort algorithm Solve
Find common elements in three sorted arrays Solve
Find the first repeating element in an array of integers Solve
Find the first non-repeating element in a given array of integers Solve
Subarrays with equal 1s and 0s Solve
Rearrange the array in alternating positive and negative items Solve
Find if there is any subarray with a sum equal to zero Solve
Find the Largest sum contiguous Subarray Solve
Find the factorial of a large number Solve
Find Maximum Product Subarray Solve
Find the longest consecutive subsequence Solve
Find the minimum element in a rotated and sorted array Solve
Max sum in the configuration Solve
Minimum Platforms Solve
Minimize the maximum difference between the heights Solve
Minimum number of jumps to reach the end Solve
Stock Span problem Solve
Find a triplet that sums to a given value Solve
Smallest positive missing number Solve
Find the row with a maximum number of 1’s Solve
Print the matrix in a Spiral manner Solve
Find whether an array is a subset of another array Solve
Implement two Stacks in an array Solve
Majority Element Solve
Wave Array Solve
Trapping Rainwater Solve

Level 3

Problems

Solve
Maximum Index Solve
Max sum path in two arrays Solve
Find Missing And Repeating Solve
Stock buy and sell Problem Solve
Pair with the given sum in a sorted array Solve
Chocolate Distribution Problem Solve
Partition Equal Subset Sum Solve
Smallest Positive integer that can’t be represented as a sum Solve
Coin Change Problem Solve
Longest Alternating subsequence Solve

 

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Shaida Kate Naidoo
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