Array Interview Questions - Array Practice Questions

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Difficulty	Question Title	Company Name	Category
Medium	Contiguous Array	Amazon MakeMyTrip Morgan Stanley Paytm	array
Easy	Maximum Length of Repeated Subarray		array
Easy	Count pair with Given Sum	Accolite Amazon Factset Hike	array
	Maximum difference between frequency of two elements such that element having greater frequency is also greater		array
	All Unique Triplets that Sum up to a Given Value		array
Easy	Longest Subarray Having Count of 1s One More than Count of 0s		array
	Maximum Array from Two given Arrays Keeping Order Same		array
Easy	Count Subarrays with Same Even and Odd Elements		array
Easy	Rearrange an Array Such that arr[i] is equal to i		array
Easy	Segregate 0s and 1s in an Array		array
	Maximum Number of Chocolates to be Distributed Equally Among k Students		array
Easy	Maximum Consecutive Numbers Present in an Array		array
Easy	Move all Negative Numbers to Beginning and Positive to End with Constant Extra Space		array
	Queries for Number of Distinct Elements in a Subarray		array
	Queries on Probability of Even or Odd Number in given Ranges		array
	Total Numbers With no Repeated Digits in a Range		array
	Range Minimum Query (Square Root Decomposition and Sparse Table)		array
	Range Sum Query using Sparse Table		array
	Count and Toggle Queries on a Binary Array		array
	Queries for Decimal Values of Subarrays of a Binary Array		array
	Maximize Elements Using Another Array		array
	Find whether an array is subset of another array		array
	Print all triplets in sorted array that form AP		array
	Find number of pairs in an array such that their XOR is 0		array
	Given an Array of Pairs Find all Symmetric Pairs in it		array
	Find all triplets with zero sum		array
	Generate all possible sorted arrays from alternate elements of two given sorted arrays		array
	Array Queries for multiply, replacements and product		array
	Check in binary array the number represented by a subarray is odd or even		array
	Queries for counts of array elements with values in given range		array
	Products of ranges in an array		array
	Palindrome Permutation		array
	Sort an array according to the order defined by another array		array
	Rearrange a binary string as alternate x and y occurrences		array
	Shuffle 2n integers as a1-b1-a2-b2-a3-b3-..bn without using extra space		array
	Distinct adjacent elements in an array		array
	Construction of Longest Increasing Subsequence (N log N)		array
	Maximize sum of consecutive differences in a circular array		array
	Three way partitioning of an array around a given range		array
	Check if X can give change to every person in the Queue		array
	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’		array
	Maximum length subsequence with difference between adjacent elements as either 0 or 1		array
	Replace two consecutive equal values with one greater		array
	Find a sorted subsequence of size 3 in linear time		array
	Maximum Product Subarray		array
	Convert array into Zig-Zag fashion		array
	Rearrange array such that even index elements are smaller and odd index elements are greater		array
	Segregate even and odd numbers		array
Easy	Find Minimum In Rotated Sorted Array	Adobe Amazon Microsoft Morgan Stanley Samsung Snapdeal Times Internet	array
	Move all negative elements to end in order with extra space allowed		array
	Rearrange array such that even positioned are greater than odd		array
	Double the first element and move zero to end		array
Easy	Remove duplicates from sorted array	Amazon Facebook Morgan Stanley Wipro Xome Zoho	array
Easy	Product of array except self	Accolite Amazon DE Shaw Morgan Stanley Opera	array
Hard	First missing positive	Accolite Amazon Factset Samsung Snapdeal	array
	Find the minimum distance between two numbers		array
	Count pairs from two sorted arrays whose sum is equal to a given value x		array
	Find the subarray with least average		array
	Find the smallest positive integer value that cannot be represented as sum of any subset of a given array		array
	Find minimum number of merge operations to make an array palindrome		array
	Minimize the maximum difference between the heights		array
	Find maximum average subarray of k length		array
	Find minimum difference between any two elements		array
	Count minimum steps to get the given desired array		array
	Dividing Array into Pairs With Sum Divisible by K		array
	Count Distinct Elements in Every Window of Size K		array
	Count Subsets Having Distinct Even Numbers		array
	Find Three Element From Different Three Arrays Such That a + b + c = sum		array
	Longest Increasing Subsequence		array
	Count Pairs Whose Products Exist in Array		array
	Merge Overlapping Intervals		array
	Median of Two Sorted Arrays		array
	Maximum Product Subarray		array
Medium	Find Maximum of Minimum for Every Window Size in a Given Array	Amazon Flipkart SAP Labs Zoho	array
	Longest Common Prefix Using Word by Word Matching		array
	Minimum Size Subarray Sum		array
	Intersection of Two Arrays		array
	Search an Element in Sorted Rotated Array		array
	Maximum Product Subarray		array
	3 Sum		array
	Find The Duplicate Number		array
	Maximum Sum of 3 Non-Overlapping Subarrays		array
	Minimum Index Sum of Two Lists		array
	Split Array Into Consecutive Subsequences		array
	Find the Duplicate Element		array
	Find the Only Repetitive Element Between 1 to N-1		array
	Trapping Rain Water		array
	Finding K closest element		array
	Jump Game		array
	Combination Sum		array
	Search in Sorted Rotated Array		array
	Maximum Subarray		array
	Sliding Window Maximum		array
	Delete And Earn		array
	Length of Longest Fibonacci Subsequence		array
	Merging Intervals		array
	First Bad Version		array
	Peak Index in a Mountain Array		array
	4Sum		array
	Create Maximum Number		array
	Degree of an array		array
	Queue Reconstruction by Height		array
	Search Insert Position		array
	Find Peak Element		array
	Valid Triangle Number		array
	Power of Two		array
	Maximum size subarray sum equals k		array
	Next greater element		array
	Guess The Word		array
	Missing Number		array
	Merge Sorted Array		array
	Partition Equal Subset Sum		array
	Last Stone Weight		array
	Sort Colors		array
	Rotate Array		array
	Subarray Sum Equals k		array
	Infix to Postfix		array
	Circular Queue		array
	Given a sorted array and a number x, find the pair in array whose sum is closest to x		array
	Find the subarray whose sum is equal to a given number X		array
	Arrange Even and Odd number such that Odd comes after Even		array
	Minimum number of Merge Operations to make an Array Palindrome		array
	Form minimum number from given sequence of D’s and I’s		array
	Longest span with same sum in two binary arrays		array
	Find the Subarray of given length with Least Average		array
	Find Zeros to be Flipped so that number of Consecutive 1’s is maximized		array
	Merge K Sorted Arrays and Print Sorted Output		array
	Find the minimum element in a sorted and rotated array		array
	Find the point where a monotonically increasing function becomes positive first time		array
	Print all possible combinations of r elements in a given array of size n		array
	Sort Elements by frequency		array
	Stock Buy Sell to Maximize Profit		array
	Merge Overlapping Intervals		array
	Maximum Subarray Sum using Divide and Conquer		array
	Pancake sorting Problem		array
	Pancake sorting		array
	Arrange given numbers to form the biggest number		array
	Iterative Implementation of quick sort		array
	Shuffle a given array		array
	Find the row with maximum number of 1’s		array
	Sorting a k sorted array		array
	Maximum product subarray		array
	Largest subarray with equal number of 0’s and 1’s		array
	Find the two numbers with odd occurrences in an unsorted array		array
	Maximum sum increasing subsequence		array
	Implement two stacks in an array		array
	Number of smaller elements on right side		array
	Increasing subsequence of length three with maximum product		array
	Elements appear more than n/k times in array		array
	Find the Peak element from an array		array
	Rearrange positive and negative numbers alternatively in Array		array
	Find the maximum repeating number in array		array
	Tug of War		array
	First Circular Tour to Visit all the Petrol Bunks		array
	Count Possible Triangles		array
	Maximum Circular Subarray Sum		array
	Four Elements that Sum to Given		array
	Maximum Length of Chain Pairs		array
	Find Pair with Given Difference		array
	Partition Problem		array
	The Celebrity Problem		array
	Find a Sorted Subsequence of size 3		array
	Subarray with Given Sum		array
	Maximum Element in an Array which is Increasing and then Decreasing		array
	Count Minimum Steps to Get the given Array		array
	Find the Lost Element From a Duplicated Array		array
	Rearrange given Array in Maximum Minimum Form		array
	Subarray and Subsequence		array
	Merge Two Sorted Arrays		array
	Count of Triplets With Sum Less than Given Value		array
	Reorder Array Using Given Indexes		array
	Next Greater Element in an Array		array
	Merging Two Sorted Arrays		array
	Reorder an Array According to the Given Indexes		array
	Find a Fixed Point in a Given Array		array
	Find Element Using Binary Search in Sorted Array		array
	Find Triplet in Array With a Given Sum		array
	Check if the Elements of an Array are Consecutive		array
	Find Duplicates in an Array in Most Efficient Way		array
	Sort 0s 1s and 2s in an Array		array
	Find Leaders in an Array		array
	Smallest Positive Number Missing in an Unsorted Array		array
	Find K Length Subarray of Maximum Average		array
	Find Pythagorean Triplets from Array		array
	Move All the Zeros to the End of the Given Array		array
	Find Minimum Distance Between Two Numbers in an Array		array
	Rotate Image by 90 degrees		array
	Count Number of Occurrences in a Sorted Array		array
	Maximum Sum of Non Consecutive Elements		array
	Find Smallest Missing Number in a Sorted Array		array
	First Repeating Element		array
	Multiplication of Previous and Next		array
	A Product Array Puzzle		array
	Find All Pairs With a Given Difference		array
	Find all Common Elements in Given Three Sorted Arrays		array
	Find the first Repeating Number in a Given Array		array
	Print All Distinct Elements of the Array		array
	Maximum difference between two elements such as larger element comes after smaller		array
	Majority Element		array
	Find the First and Second Smallest Elements		array
	Find the Number Occurring Odd Number of Times in an Array		array
	Sort Elements by Frequency of Occurrences		array
	Find the Missing Number		array
	Find Nearest Greater and Smaller Element		array
	Largest Sum Contiguous Subarray		array
	Reverse an Array		array
	Find a Triplet That Sum to a Given Value		array
	Find elements pair from array whose sum equal to number		array

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