Two Pointes
The two-pointer technique is an efficient algorithmic approach that uses two indexes to traverse data structures like arrays or strings. The pointers move toward each other, away from each other or in the same direction to solve problems involving searching, pair finding or window management. It reduces complexity, often turning O(n²) solutions into O(n), making it ideal for optimized problem-solving.
Top Two Pointes 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
Check if a Linked List is Palindrome
Palindrome Linked List | Check if a Linked List is Palindrome O(n) time and O(1) space | Fast & Slow Pointer Method with In-Place Second Half Reversal
Length of the Longest Substring Without Repeating Characters
Length of the Longest Substring Without Repeating Characters | Given a string str find the length of the longest substring without repeating characters | find the length of the longest substring without repeating characters in a given string |
Remove Duplicates from Sorted Array II
Given a sorted integer array in ascending order , remove all duplicates from this array so that each unique element appears at most twise in this array. also maintain relative order of the elements in array.
Remove Duplicates from Sorted Array
Given an integer sorted array (arr) in ascending order , remove all duplicates from this array so that each unique element appears only once in this array. also maintain relative order of the elements in array
Merge Sorted Array
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.
Popular Topics
Software DesignInterviewJavaApplication DesignLoopLanguage-ConceptsChallangeQueryCoding ProblemsInterview Experience
Software design is the process of planning and structuring a software system’s architecture, components, interfaces, and data flow to meet functional and non-functional requirements. It ensures scalability, maintainability and performance. Key approaches include modular design, object-oriented design and architectural patterns like MVC and microservices for efficient, reliable software development.
A structured conversation where one participant asks questions and the other provides answers of those questions.
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.
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.
Loop are a type of control flow structure in programming in which a series of statements may be executed repeatedly until some condition is met.
This tag is used to understand a basic part of the language.
A challenge is a task, problem or situation that tests a person’s skills, knowledge or determination. Challenges encourage growth by pushing individuals beyond their comfort zones and inspiring creative problem-solving. In learning, technology and work environments, challenges help improve abilities, build confidence and lead to meaningful achievements through consistent effort and resilience.
In databases, a query is a request to retrieve, insert, update or delete data. Written in SQL (Structured Query Language), queries can be simple, like fetching all rows from a table, or complex, involving joins, conditions and aggregations. They are essential for interacting with and managing database information efficiently.
Coding problems are exercises designed to test a programmer’s ability to write logic, solve challenges and apply algorithms or data structures. They help improve problem-solving skills, logical thinking and coding efficiency. Common in interviews and competitive programming, coding problems range from simple tasks to complex algorithmic challenges, preparing developers for real-world software development scenarios.
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.
Popular Articles
Top 50 SQL Interview Questions and Answers (Beginner to Intermediate). Top SQL Interview Questions for fresher. Frequently asked SQL interview questions with answers
Learn how to create a primary key in SQL using syntax and examples. Ensure unique records, improve query performance and build table relationships.
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
Mastering the Singleton Design Pattern in C#, Singleton Design Pattern in Depth: Structure, Use Cases and Best Practices, in depth design pattern, LLD , low level design
Rotate an array of n elements to the right by k steps | right rotate the elements of an array | array rotate | rotate array by k step
Static Class vs Singleton in C#: A Complete Deep Dive
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
how to install docker on amazon ec2 instance. docker installation command on linux machine, docker commands, Commonly Used Docker Commands on EC2
Most Popular Tools
Explore our top online tools including a blank page for notes, a QR code generator, word counter and collaborative editor. These free, easy-to-use utilities help you write, analyze, share and organize content faster. Perfect for developers, creators and students to streamline everyday digital tasks efficiently.
Blank Page
Create a blank canvas for your ideas, notes or sketches. Use this tool for rough work and jotting down your thoughts
QR Code Generator
A QR Code Generator is a tool that instantly converts text, URLs or other data into a scannable QR code. Users can create custom QR codes for websites, contact info or messages. It's commonly used for quick access, sharing and printing without needing a backend or complex setup.
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