Arrays

6.4k+ posts

Last Updated: 13 April 2025

In this article, we introduce array, implementation in different popular languages, its basic operations and commonly seen problems / interv ...read more

Arrays

DSA

Top 50 Array Coding Problems for Interviews

Last Updated: 26 March 2025

Array is one of the most widely used data structure and is frequently asked in coding interviews to the problem solving skills. The followin ...read more

Last Updated: 12 April 2025

Array is a linear data structure where all elements are arranged sequentially. It is a collection of elements of same data type stored at co...read more

Arrays

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Second Largest Element in an Array

Last Updated: 10 February 2025

Given an array of positive integers arr[] of size n, the task is to find second largest distinct element in the array.Note: If the second la...read more

Linear Search Algorithm

Last Updated: 27 March 2025

Given an array, arr of n integers, and an integer element x, find whether element x is present in the array. Return the index of the first o...read more

K’th Smallest Element in Unsorted Array

Last Updated: 14 August 2024

Given an array arr[] of N distinct elements and a number K, where K is smaller than the size of the array. Find the K'th smallest element in ...read more

Largest element in an Array

Last Updated: 27 December 2024

Given an array arr. The task is to find the largest element in the given array.Examples:Input: arr[] = [10, 20, 4]Output: 20Explanation: Amo ...read more

Basic Coding Problems

Subset Sum Problem

Last Updated: 15 March 2025

Given an array arr[] of non-negative integers and a value sum, the task is to check if there is a subset of the given array whose sum is equ...read more

Last Updated: 17 February 2025

Array: Arrays store elements in contiguous memory locations, resulting in easily calculable addresses for the elements stored and this allow...read more

Arrays

Linked List

DSA

Maximum and minimum of an array using minimum number of comparisons

Last Updated: 14 September 2024

Given an array of size N. The task is to find the maximum and the minimum element of the array using the minimum number of comparisons.Examp ...read more

Rotate an Array by d - Counterclockwise or Left

Last Updated: 03 October 2024

Given an array of integers arr[] of size n, the task is to rotate the array elements to the left by d positions.Examples:Input:arr[] = {1, 2...read more

Array Reverse - Complete Tutorial

Last Updated: 25 September 2024

Given an array arr[], the task is to reverse the array. Reversing an array means rearranging the elements such that the first element become...read more

Find the Missing Number

Last Updated: 19 April 2025

Given an array arr[] of size n-1 with distinct integers in the range of [1, n]. This array represents a permutation of the integers from 1 t ...read more

limited-range-elements

DSA

Maximum Subarray Sum - Kadane's Algorithm

Last Updated: 28 February 2025

Given an array arr[], the task is to find the subarray that has the maximum sum and return its sum.Examples:Input: arr[] = {2, 3, -8, 7, -1,...read more

Two Sum - Pair with given Sum

Last Updated: 21 December 2024

Given an array arr[] of n integers and a target value, the task is to find whether there is a pair of elements in the array whose sum is equ...read more