| Medium | Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i | Accenture Adobe Amazon Factset Zoho | array |
| Medium | Contiguous Array | Amazon MakeMyTrip Morgan Stanley Paytm | array |
| Medium | Maximum Length of Repeated Subarray | Indeed Karat Roblox | array |
| Easy | Count pair with Given Sum | Accolite Amazon Factset Hike | array |
| Medium | Maximum difference between frequency of two elements such that element having greater frequency is also greater | Accenture Accolite Amazon VMware | array |
| Medium | All Unique Triplets that Sum up to a Given Value | Accolite Amazon Fanatics | array |
| Easy | Longest Subarray Having Count of 1s One More than Count of 0s | Accenture Amazon DE Shaw Samsung | array |
| Medium | Maximum Array from Two given Arrays Keeping Order Same | Accenture Amazon Delhivery Factset Fourkites OYO Rooms Publicis Sapient Zoho | array |
| Easy | Count Subarrays with Same Even and Odd Elements | Accenture Factset Fanatics | array |
| Easy | Rearrange an Array Such that arr[i] is equal to i | Accenture Adobe Amazon Fanatics Fourkites Zoho | array |
| Easy | Segregate 0s and 1s in an Array | Accolite Amazon Fab MakeMyTrip PayPal Paytm Zoho | array |
| Medium | Maximum Number of Chocolates to be Distributed Equally Among k Students | Accenture Adobe Amazon Facebook Fourkites | array |
| Easy | Maximum Consecutive Numbers Present in an Array | Accolite Adobe Amazon Fourkites MAQ | array |
| Easy | Move all Negative Numbers to Beginning and Positive to End with Constant Extra Space | Capgemini Hike MAQ o9 solutions TCS | array |
| Hard | Queries for Number of Distinct Elements in a Subarray | Amazon Google Microsoft Oracle Uber | array |
| Hard | Queries on Probability of Even or Odd Number in given Ranges | Google Honeywell Uber | array |
| Medium | Total Numbers With no Repeated Digits in a Range | Accolite Factset MAQ | array |
| Hard | Range Minimum Query (Square Root Decomposition and Sparse Table) | Amazon Apple Google | array |
| Medium | Range Sum Query using Sparse Table | Amazon Publicis Sapient Zoho | array |
| Hard | Count and Toggle Queries on a Binary Array | Amazon Facebook Google Uber | array |
| Medium | Queries for Decimal Values of Subarrays of a Binary Array | Amazon Google | array |
| Medium | Maximize Elements Using Another Array | Amazon Fanatics Fourkites | array |
| Easy | Find whether an array is subset of another array | Accolite GE Healthcare Qualcomm | array |
| Medium | Print all triplets in sorted array that form AP | Accenture Accolite Cadence India Google InfoEdge Intuit Pinterest | array |
| Medium | Find number of pairs in an array such that their XOR is 0 | Cadence India CouponDunia Honeywell Indeed InfoEdge Moonfrog Labs Pinterest | array |
| Easy | Given an Array of Pairs Find all Symmetric Pairs in it | Amazon Capgemini Cisco FreeCharge Moonfrog Labs Opera Xome | array |
| Medium | Find all triplets with zero sum | Amazon GE Healthcare Google Hike | array |
| Medium | Generate all possible sorted arrays from alternate elements of two given sorted arrays | Directi Karat PayPal Twilio Yandex | array |
| Hard | Array Queries for multiply replacements and product | Cadence India DE Shaw Expedia Google | array |
| Easy | Check in binary array the number represented by a subarray is odd or even | Cisco Fab IBM Microsoft PayU Snapchat Snapdeal Teradata | array |
| Hard | Queries for counts of array elements with values in given range | Coursera DE Shaw Google PayU Snapdeal Times Internet Yahoo | array |
| Hard | Products of ranges in an array | Accolite DE Shaw FreeCharge Google SAP Labs Snapdeal Times Internet | array |
| Easy | Palindrome Permutation | Facebook Microsoft | array |
| Easy | Sort an array according to the order defined by another array | Amazon Microsoft SAP Labs Snapchat Yahoo Zoho | array |
| Medium | Shuffle 2n integers as a1-b1-a2-b2-a3-b3-..bn without using extra space | Adobe DE Shaw Expedia Fanatics Indeed PayU | array |
| Easy | Distinct adjacent elements in an array | Coursera DE Shaw Hike IBM Kuliza Nagarro Opera OYO Rooms Zoho | array |
| Hard | Construction of Longest Increasing Subsequence (N log N) | Amazon BankBazaar Paytm Samsung | array |
| Easy | Maximize sum of consecutive differences in a circular array | Cadence India eBay GE Healthcare Karat SAP Labs Square | array |
| Easy | Three way partitioning of an array around a given range | BankBazaar BlackRock Capital One Citadel Fab Moonfrog Labs Synopsys Twilio Yahoo | array |
| Medium | Check if X can give change to every person in the Queue | Amazon | array |
| Easy | Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’ | Amazon Delhivery Kuliza Nagarro Opera Times Internet Yatra | array |
| Medium | Maximum length subsequence with difference between adjacent elements as either 0 or 1 | Cisco Expedia Qualtrics SAP Labs Teradata | array |
| Easy | Replace two consecutive equal values with one greater | Accenture Citadel FreeCharge PayPal Square Teradata | array |
| Medium | Find a sorted subsequence of size 3 in linear time | Avalara Capital One Citadel Citrix eBay Fab Synopsys | array |
| Medium | Maximum Product Subarray | Amazon Cisco Microsoft Morgan Stanley Myntra PayU Times Internet Zoho | array |
| Easy | Convert array into Zig-Zag fashion | Accenture Amazon Fourkites Teradata Xome | array |
| Easy | Rearrange array such that even index elements are smaller and odd index elements are greater | Avalara Epic Systems Fourkites Roblox Tesla | array |
| Easy | Segregate even and odd numbers | Accolite LinkedIn MakeMyTrip Paytm | array |
| Easy | Find Minimum In Rotated Sorted Array | Adobe Amazon Microsoft Morgan Stanley Samsung Snapdeal Times Internet | array |
| Easy | Move all negative elements to end in order with extra space allowed | Capital One Citrix IBM SAP Labs Taxi4Sure Twilio | array |
| Easy | Rearrange array such that even positioned are greater than odd | Amazon LinkedIn OYO Rooms Times Internet Zoho | array |
| Medium | Double the first element and move zero to end | Microsoft Zoho | 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 |
| Easy | Find the minimum distance between two numbers | CouponDunia Coursera Delhivery Moonfrog Labs PayPal Paytm Snapchat | array |
| Easy | Count pairs from two sorted arrays whose sum is equal to a given value x | BankBazaar Cisco Citadel Honeywell PayU Roblox Taxi4Sure Yandex | array |
| Easy | Find the subarray with least average | Amazon Capital One Moonfrog Labs | array |
| Easy | Find the smallest positive integer value that cannot be represented as sum of any subset of a given array | Databricks Fab Taxi4Sure UHG Optum | array |
| Easy | Find minimum number of merge operations to make an array palindrome | Accolite Adobe Amazon Fourkites | array |
| Medium | Minimize the maximum difference between the heights | Adobe Cisco Fanatics Yandex | array |
| Easy | Find maximum average subarray of k length | Amazon | array |
| Easy | Find minimum difference between any two elements | Amazon | array |
| Medium | Count minimum steps to get the given desired array | Capital One Citrix Coursera Synopsys Zycus | array |
| Easy | Dividing Array into Pairs With Sum Divisible by K | Amazon Microsoft | array |
| Medium | Count Distinct Elements in Every Window of Size K | Accolite Amazon Microsoft | array |
| Easy | Count Subsets Having Distinct Even Numbers | Cisco Expedia Myntra SAP Labs Taxi4Sure | array |
| Medium | Find Three Element From Different Three Arrays Such That a + b + c = sum | Amazon Databricks Directi JP Morgan Taxi4Sure Twilio Zoho | array |
| Medium | Longest Increasing Subsequence | Adobe Amazon Citrix CodeNation Facebook Google Microsoft Samsung Zoho | array |
| Easy | Count Pairs Whose Products Exist in Array | Accolite Amazon BlackRock Moonfrog Labs Ola Cabs Snapchat Xome | array |
| Medium | Merge Overlapping Intervals | Adobe Amazon Apple Bloomberg Cisco eBay Facebook Goldman Sachs Google IXL Microsoft Oracle Palantir Technologies PayPal Splunk Square Twitter Uber VMware Yandex | array |
| Hard | Median of Two Sorted Arrays | Adobe Amazon Apple Bloomberg ByteDance Facebook Goldman Sachs Google Microsoft | array |
| Medium | Maximum Product Subarray | Amazon Apple Bloomberg Facebook Google Microsoft | array |
| Medium | Find Maximum of Minimum for Every Window Size in a Given Array | Amazon Directi Flipkart SAP Labs Zoho | array |
| Medium | Longest Common Prefix Using Word by Word Matching | VMware | array |
| Medium | Minimum Size Subarray Sum | Amazon Facebook Goldman Sachs Google Microsoft | array |
| Easy | Intersection of Two Arrays | Amazon ByteDance Facebook | array |
| Medium | Search an Element in Sorted Rotated Array | Adobe Amazon Apple Bloomberg ByteDance eBay Expedia Facebook Google Microsoft Nvidia Oracle PayPal Paytm VMware Walmart Labs Zillow | array |
| Medium | Maximum Product Subarray | Amazon Apple Bloomberg Facebook Google Microsoft | array |
| Medium | 3 Sum | Adobe Amazon Apple Bloomberg Facebook Google Microsoft Oracle Qualtrics Tesla VMware | array |
| Medium | Find The Duplicate Number | Amazon Apple Bloomberg Google Microsoft | array |
| Hard | Maximum Sum of 3 Non-Overlapping Subarrays | Facebook | array |
| Easy | Minimum Index Sum of Two Lists | Oracle Yelp | array |
| Medium | Split Array Into Consecutive Subsequences | Google | array |
| Medium | Find the Duplicate Element | Apple Bloomberg Google Microsoft | array |
| Easy | Find the Only Repetitive Element Between 1 to N-1 | CouponDunia Delhivery GreyOrange Info Edge LinkedIn Nagarro SAP Labs | array |
| Hard | Trapping Rain Water | Adobe Amazon Apple Bloomberg Databricks Expedia Facebook Flipkart Goldman Sachs Google Microsoft Oracle Qualtrics ServiceNow Walmart Labs Yahoo | array |
| Medium | Finding K closest element | Amazon | array |
| Medium | Jump Game | Adobe Amazon Bloomberg Facebook Microsoft | array |
| Medium | Combination Sum | Adobe Amazon Apple Bloomberg eBay Facebook Microsoft | array |
| Medium | Search in Sorted Rotated Array | Adobe Amazon Apple Bloomberg ByteDance eBay Expedia Facebook Goldman Sachs Google Microsoft Nvidia Oracle PayPal VMware Walmart Labs | array |
| Easy | Maximum Subarray | Adobe Amazon Apple Bloomberg ByteDance Cisco Facebook Goldman Sachs Google JP Morgan JPMorgan LinkedIn Microsoft Oracle PayPal Paytm Uber | array |
| Medium | Sliding Window Maximum | Akuna Capital Amazon ByteDance Citadel Databricks Dropbox Expedia Facebook Google IBM Uber | array |
| Medium | Delete And Earn | Pocket Gems | array |
| Medium | Length of Longest Fibonacci Subsequence | Amazon | array |
| Medium | Merging Intervals | Adobe Amazon Apple Bloomberg Cisco eBay Facebook Goldman Sachs Google IXL Microsoft Oracle Palantir Technologies PayPal Splunk Square Twitter Uber VMware Walmart Labs Yahoo Yandex | array |
| Easy | First Bad Version | Amazon Cisco Facebook Google | array |
| Easy | Peak Index in a Mountain Array | Microsoft | array |
| Medium | 4Sum | Adobe Amazon Apple Goldman Sachs | array |
| Hard | Create Maximum Number | Apple | array |
| Easy | Degree of an array | VMware Walmart Labs | array |
| Medium | Queue Reconstruction by Height | Amazon Apple ByteDance Facebook Google | array |
| Easy | Search Insert Position | Adobe | array |
| Medium | Find Peak Element | Adobe Amazon Apple Bloomberg ByteDance Facebook Google Visa | array |
| Medium | Valid Triangle Number | Bloomberg Robinhood | array |
| Easy | Power of Two | Apple | array |
| Medium | Maximum size subarray sum equals k | Facebook Microsoft | array |
| Easy | Next greater element | Amazon Bloomberg | array |
| Hard | Guess The Word | Amazon Google | array |
| Easy | Missing Number | Amazon Apple Capital One Cisco Facebook Microsoft | array |
| Easy | Merge Sorted Array | Amazon Amdocs Apple Bloomberg Brocade Facebook Goldman Sachs IBM Juniper Networks LinkedIn Microsoft Quikr Snapdeal Synopsys Visa Zoho | array |
| Medium | Partition Equal Subset Sum | Amazon Facebook Google | array |
| Easy | Last Stone Weight | Amazon | array |
| Medium | Sort Colors | Amazon eBay Expedia Facebook Goldman Sachs Nvidia Oracle | array |
| Medium | Rotate Array | Amazon Apple MakeMyTrip MAQ Microsoft Oracle SAP SAP Labs Wipro | array |
| Medium | Subarray Sum Equals k | Adobe Amazon American Express Bloomberg eBay Facebook Goldman Sachs Google Microsoft Twilio Yahoo | array |
| Hard | Infix to Postfix | Amazon Paytm Samsung VMware | array |
| Easy | Circular Queue | Infosys MAQ o9 solutions Oracle | 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 |
