Arrays

6.4k+ posts

Top 50 Array Coding Problems for Interviews

Last Updated: 28 November 2023

Here is the collection of the Top 50 list of frequently asked interviews question on arrays. Problems in this Article are divided into three...read more

Arrays

Algorithms

Data Structures

GFG Sheets

DSA

What is Array?

Last Updated: 20 July 2023

What is an Array?An array is a collection of items of same data type stored at contiguous memory locations.For simplicity, we can think of a...read more

Arrays

Data Structures

DSA

Find Second largest element in an array

Last Updated: 22 November 2023

Given an array of integers, our task is to write a program that efficiently finds the second-largest element present in the array.Examples:I ...read more

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Array of Strings in C++ - 5 Different Ways to Create

Last Updated: 11 March 2023

In C++, a string is usually just an array of (or a reference/points to) characters that ends with the NULL character '\0'. A string is a 1-d ...read more

Linear Search Algorithm - Data Structure and Algorithms Tutorials

Last Updated: 02 June 2023

Linear Search is defined as a sequential search algorithm that starts at one end and goes through each element of a list until the desired e...read more

K’th Smallest/Largest Element in Unsorted Array

Last Updated: 29 October 2023

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

Last Updated: 07 November 2023

Given a set of non-negative integers and a value sum, the task is to check if there is a subset of the given set whose sum is equal to the g...read more

Last Updated: 10 July 2023

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: 23 November 2023

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

Inversion count in Array using Merge Sort

Last Updated: 28 July 2023

Inversion Count for an array indicates - how far (or close) the array is from being sorted. If the array is already sorted, then the inversi...read more

Program for array left rotation by d positions.

Last Updated: 06 October 2023

Given an array of integers arr[] of size N and an integer, the task is to rotate the array elements to the left by d positions.Examples: Inp...read more

Write a program to reverse an array or string

Last Updated: 06 October 2023

Given an array (or string), the task is to reverse the array/string.Examples :Input : arr[] = {1, 2, 3}Output : arr[] = {3, 2, 1}Input : a...read more

Find the Missing Number

Last Updated: 07 December 2023

Given an array arr[] of size N-1 with integers in the range of [1, N], the task is to find the missing number from the first N integers.Note ...read more

limited-range-elements

DSA

Largest Sum Contiguous Subarray (Kadane's Algorithm)

Last Updated: 08 December 2023

Given an array arr[] of size N. The task is to find the sum of the contiguous subarray within a arr[] with the largest sum. Recommended P...read more

Check if pair with given Sum exists in Array (Two Sum)

Last Updated: 14 August 2023

Given an array A[] of n numbers and another number x, the task is to check whether or not there exist two elements in A[] whose sum is exact ...read more

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