Array
An array is a linear data structure that stores multiple elements of the same type in contiguous memory locations. It allows fast access using index positions, making operations like retrieval efficient. Arrays are widely used for organizing data, implementing algorithms and building other data structures. However, their size is fixed, making resizing difficult compared to dynamic collections.
Top Array Blogs
Longest Playlist With No Repeated Songs : Brute Force to Optimal
Find the longest playlist with no repeated songs using brute force, HashSet, and HashMap sliding window techniques, with Java code and dry runs.
American Express (AMEX) Online Assessment Experience (2026) | 3 Coding Questions
Read my American Express Online Assessment 2026 experience with 3 coding questions, C# solutions, approaches, difficulty analysis and preparation tips.
Maximum Productivity After Employee Rearrangement | Dynamic Programming Assignment Problem
Maximize team productivity after employee rearrangement using Dynamic Programming. Learn the key observation, DP state design, transitions, and O(N²) solution.
Minimum Cost to Sort an Array by Sorting Subarrays
Minimum Cost to Sort Array problem explained with brute force, optimal approach, chunks, DSA intuition, Java/C++/Python/C# solutions.
Find the repeating and missing numbers
Find the repeating and missing numbers in an array from 1..n using brute force, hashmap, math and XOR, step-by-step explained with real-world use cases.
4 Sum | Find Quads that add up to a target value
Intersection of Two Sorted Arrays
Sort an Array of 0s and 1s
Move all Zeros to the end of the array
Remove Duplicates from Sorted Array (In-Place)
Top Array Articles
Sliding Window Algorithm : Beginners to Advanced Engineers
Sliding Window Algorithm, What is the Sliding Window Approach?, Why Use Sliding Window? Where to Use Sliding Window, How Sliding Window Works with Examples
What is Two Pointer Approach?
The two-pointer technique is a foundational pattern for solving array, string, and linked-list problems in linear (or near-linear) time with constant extra space
2 Sum - Pair Sum Closest to 0
2 Sum - Pair Sum Closest to 0 , Sum of two elements whose sum is closest to zero , array DSA problem, coding problem , DSA coding problem , DSA interview coding problem
2 Sum – Count Pairs with given Sum in Sorted Array
2 Sum – Count Pairs with given Sum in Sorted Array, two sum , Count pairs with given sum , 2 sum problem , array DSA problem, coding problem , DSA interview coding problem
2 Sum Count pairs with given sum
2 Sum – Count pairs with given sum, two sum , Count pairs with given sum , 2 sum problem , array DSA problem, coding problem , DSA interview coding problem
Two Sum - Pair with given Sum
Two Sum – Pair with given Sum , 2 sum problem , array DSA problem, coding problem , DSA coding problem , DSA interview coding problem
Container With Most Water
Container With Most Water | You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the ith line are (i, 0) and (i, height[i]). Find two lines that together with the x-axis form a container such that the container contains the most water.
Maximum Product of Three Numbers
Maximum product of a triplet (subsequence of size 3) in array | Maximum Product of Three Numbers | Given an integer array arr, find three numbers whose product is maximum and return the maximum product.
3 Sum : Find triplets that add up to a target value
3 Sum : Find triplets that add up to a target value, 3 sum problem , Triplet Sum in Array , Given an integer array nums, return all the triplets that add up to a target value
Maximum Product Subarray
Maximum Product Subarray, Find Maximum Product Subarray in an Array, Given an integer array arr, find a subarray that has the largest product,
Popular Topics
System Design InterviewArrayApplication DesignInterview ExperienceTechnical InterviewSQLInterview Preparation TipsC#JavaDSA
System Design Interview is a technical interview round where candidates design scalable, reliable and efficient software systems. It evaluates understanding of architecture, databases, APIs, scalability, load balancing, caching and real-world problem-solving to assess the ability to build large-scale applications.
An array is a linear data structure that stores multiple elements of the same type in contiguous memory locations. It allows fast access using index positions, making operations like retrieval efficient. Arrays are widely used for organizing data, implementing algorithms and building other data structures. However, their size is fixed, making resizing difficult compared to dynamic collections.
Application design is the process of planning and structuring an application’s architecture, user interface, data flow and functionality to meet user and business requirements. It involves decisions on technology stack, design patterns, scalability and security. Good application design ensures performance, maintainability and a seamless user experience across platforms and devices.
An interview experience is a detailed account of the interview process for a specific role, covering rounds, questions asked, difficulty level, preparation tips and personal insights to help future candidates understand what to expect and how to prepare effectively.
Technical Interview is a structured assessment where employers evaluate a candidate’s technical skills, problem-solving ability and practical knowledge related to a specific role. It typically includes coding challenges, system design questions, debugging tasks and discussions about past projects. The goal of a technical interview is to measure how effectively a candidate can apply their technical expertise to solve real-world problems.
SQL stands for Structured query language. It is a programming language for storing and processing information in a relational database. It is standard language for accessing and manipulating databases.
Interview preparation tips focus on researching the company, understanding the job role, practicing common HR and technical questions, refining communication skills and presenting yourself confidently to make a strong and professional impression during the interview.
C# (C-Sharp) is a modern, object-oriented programming language developed by Microsoft for building secure, scalable applications. It runs on the .NET platform and supports features like strong typing, garbage collection, LINQ, async programming and cross-platform development. C# is widely used for web, desktop, game development (Unity), cloud services and enterprise-level software solutions.
Java is a high-level object-oriented programming language. it's firstly released by Sun Microsystems in 1995. Use this tag when you're having queries using or understanding the language. This tag is also applicable to Java libraries and frameworks.
DSA (Data Structures and Algorithms) is a fundamental concept in computer science that focuses on efficiently storing, organizing and processing data. Data structures like arrays, linked lists, stacks and trees manage data, while algorithms provide step-by-step solutions to problems. Mastering DSA is essential for writing optimized, scalable and high-performance code.
Popular Articles
Mastering the Template Design Pattern in C#, Template Design Pattern in Depth: Structure, Use Cases and Best Practices
Maximum Product Subarray, Find Maximum Product Subarray in an Array, Given an integer array arr, find a subarray that has the largest product,
You are given two integer arrays arr1 and arr2, sorted in accending order, and two integers m and n, representing the number of elements in arr1 and arr2 respectively. Merge arr1 and arr2 into a single array sorted in accending order.
install mysql by docker. docker mysql server installation. MySQL is one of the most popular open-source relational database management systems. Docker container is a great way to manage and deploy databases in a portable and isolated environment. In this article, we will walk through the steps by step to install and run MySQL in Docker.
namespace in c# | namspace concept in c# | c# namespace | c sharp namespace | what is namesapce and it's use cases | why should we use namespace
A Structured Approach to Cracking Technical Interviews. how to prepare for Technical Interviews? Technical Interviews preparation guideline
Find the Maximum Subarray Sum | Largest Sum Contiguous Subarray | Kadane’s Algorithm | Maximum Subarray | Given an integer array nums, find the
subarray with the largest sum and return its sum | The Efficient Way to Find Maximum Subarray Sum
Amazon Transaction Logs (example question), Amazon Transaction Logs Interview question
List Handling in Java vs C# vs C++ A Deep Comparison, This comparison provides a full view java , c# and c++ List like data structures
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Blank Page
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QR Code Generator
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Word Counter
Perform various string operations like counting characters, words or letters.
Collaborative Editor
Collab Editor is a powerful, free-to-use online platform that lets you collaborate in real-time. Whether you re working on documents, brainstorming idea, or discussing projects etc