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.
Top Two Pointes Blogs
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)
Remove N-th Node from the End of a Linked List | Java
Sliding Window Patterns in DSA: Complete Guide with Examples
Popular Topics
Interview QuestionsDatabaseJavaGitAI ImpactSQLMathTechnical InterviewInterviewLanguage-Concepts
Interview Questions are structured queries asked by employers to evaluate a candidate’s technical skills, problem-solving ability, experience, communication skills and cultural fit. These questions can include HR, behavioral, technical, coding and situational topics to assess whether the candidate is suitable for the job role and organization.
A database is an organized collection of data. It is the collection of schemas, tables, queries, reports, views, and other objects. The data are typically organized to model aspects of reality in a way that supports processes requiring information. Use this tag if you have questions about designing a database.
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.
Git is a distributed version control system used to track changes in code, collaborate with teams and manage project history. It allows developers to work independently on branches, merge updates and revert to previous versions when needed. Git ensures code integrity, supports parallel development, and is widely used in software engineering for efficient source code management and collaboration.
AI Impact refers to the influence of artificial intelligence on industries, jobs, technology and society. AI is transforming sectors such as healthcare, finance, education and software development by improving automation, decision-making, productivity and innovation while also reshaping workforce skills and job roles.
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.
math tag that is used for mathematical operations Math is the study of numbers, shapes, patterns and logical relationships. It provides tools for problem-solving, measurement and analysis across science, technology, engineering and daily life. Math includes fields like algebra, geometry, calculus and statistics. It builds critical thinking skills and forms the foundation for computing, algorithms, data science and modern technological advancements.
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.
A structured conversation where one participant asks questions and the other provides answers of those questions.
This tag is used to understand a basic part of the language.
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Static Class vs Singleton in C#: A Complete Deep Dive
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.
Top High-Level Design(HLD) Interview Questions and answers, HLD QnA, HLD interview preparation
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