Development100% OFF

Python DSA: LEETCODE Exercises — Trees & Graphs

Udemy Instructor

0(338 students)

Self-paced

All Levels

About this course

This course contains the use of artificial intelligence. Master Tree & Graph Problems for Coding Interviews with Hands-On LeetCode Exercises in Python! Trees and Graphs are notoriously two of the most challenging topics in technical interviews—and they appear in almost every coding assessment for top product-based companies.

This course is designed to take you from initial confusion to complete mastery through hands-on practice, pattern recognition, and step-by-step problem-solving. Focusing strictly on LeetCode-style Tree and Graph questions, this course skips unnecessary fluff and dives straight into actionable practice. Every exercise includes detailed logic breakdowns, optimized Python code, and complete Big-O time/space complexity analysis.

Whether you're preparing for FAANG/MANG interviews, software engineering placements, or competitive programming, this targeted practice course gives you the exact blueprint needed to tackle complex hierarchical and non-linear data structure problems with confidence. What You'll LearnSolve high-frequency LeetCode Tree & Graph problems using PythonMaster essential traversal techniques (DFS, BFS, Pre-order, In-order, Post-order, Level-order)Recognize critical patterns like Topological Sort, Shortest Path, Union-Find, and Lowest Common Ancestor (LCA)Build a mental framework to break down complex tree and graph structures effortlesslyAnalyze time ($O$) and space ($O$) complexity for recursive and iterative solutionsWrite clean, optimized, production-ready Python code under timed interview conditionsTopics CoveredTrees & Binary Search Trees (BST)Binary Tree Traversals (Recursive & Iterative)Tree Construction & InversionDepth, Height, & Path ProblemsBinary Search Tree (BST) Operations & ValidationLowest Common Ancestor (LCA)Trie (Prefix Tree) FundamentalsSegment Trees & Advanced Tree StructuresGraphs & Advanced AlgorithmsGraph Representations (Adjacency Matrix & Adjacency List)Breadth-First Search (BFS) & Depth-First Search (DFS)Cycle Detection (Directed & Undirected Graphs)Connected Components & Flood FillTopological Sorting (Kahn's Algorithm & DFS)Shortest Path Algorithms (Dijkstra's, Bellman-Ford)Union-Find (Disjoint Set Union - DSU)Minimum Spanning Tree (Kruskal's & Prim's)Course FeaturesTargeted Focus: 100% dedicated to Trees and Graphs—no wasted time on unrelated basicsLeetCode-Style Questions: Practice with problems structured just like real online assessmentsDual Approach Solutions: Learn both recursive and iterative approaches where applicableOptimized Python Code: Clean, idiomatic, and performance-focused implementationsStep-by-Step Logic: Clear visual/logical walk-throughs before diving into codeSelf-Paced Practice: Perfect for targeted revision before technical interview roundsWhy Take This Course? Tree and Graph questions trip up candidates because they require strong recursion skills, edge-case management, and pattern recognition.

Memorizing solutions won't work—you need to understand the underlying mechanics. This course bridges the gap between basic theory and real-world interview execution. By focusing deeply on these two high-yield topics, you'll gain the confidence to identify key patterns instantly, choose the right algorithmic approach (BFS vs.

DFS), and craft optimal Python solutions under pressure. Level up your algorithmic thinking, master Trees & Graphs, and land your dream tech job!

Skills you'll gain

Web DevelopmentEnglish

Available Coupons

Course Information

Level: All Levels

Suitable for learners at this level

Duration: Self-paced

Total course content

Instructor: Udemy Instructor

Expert course creator

This course includes:

📹Video lectures
📄Downloadable resources
📱Mobile & desktop access
🎓Certificate of completion
♾️Lifetime access

$0$86.99

Save $86.99 today!

Enroll Now - Free

Redirects to Udemy • Limited free enrollments

Share this course

https://freecourse.io/courses/python-dsa-leetcode-exercises-trees-graphs

Are you preparing for a Node.js Developer, Backend Developer, JavaScript Developer, Full-Stack Developer, or Software Engineer interview?Do you want to test your Node.js knowledge, strengthen your backend development skills, and improve your confidence when answering technical interview questions?Introducing 350+ Node.js Interview Questions – a practice-based assessment course designed to help you evaluate your Node.js skills, reinforce important concepts, and prepare for technical interviews.Whether you are an aspiring Node.js developer or an experienced professional looking to refresh your knowledge, this course provides an opportunity to assess your understanding of Node.js through structured practice exams and detailed explanations.What Does This Course Cover?This course focuses on important Node.js concepts, practical development techniques, software architecture, and advanced topics.Key areas covered include:Node.js FundamentalsNode.js basics and runtime conceptsCore modules and APIsCommon programming patternsNode.js best practices and development toolsPractical Node.js DevelopmentImplementation patterns and application developmentState management conceptsError handling and debuggingPerformance optimizationTesting strategies and practicesArchitecture & Design in Node.jsSoftware design patternsApplication architecture and scalabilityCode organization and maintainabilitySecurity best practicesDeployment conceptsAdvanced Node.js TopicsAdvanced Node.js APIsApplication optimization techniquesNode.js ecosystem toolsCI/CD integrationApplication monitoring and performance managementWhat Makes This Course Valuable?1. Six Practice ExamsTest your Node.js knowledge through 6 practice exams designed to cover different areas of Node.js development. Use these assessments to evaluate your understanding and identify topics that need further study.2. Detailed ExplanationsEach question includes explanations to help you understand the correct answer, review important technical concepts, and learn why alternative answers are incorrect.3. Intermediate to Advanced CoverageExplore questions covering both practical Node.js development and advanced concepts, including architecture, scalability, security, performance, and deployment.4. Interview PreparationPractice answering technical questions commonly associated with Node.js development roles. Strengthen your ability to understand concepts and explain technical decisions.5. Knowledge AssessmentIdentify your strengths and knowledge gaps across Node.js fundamentals, practical development, architecture, and advanced topics.Who Should Take This Course?This course is suitable for:Aspiring Node.js Developers.Junior and Intermediate Node.js Developers.Experienced Backend Developers.JavaScript and Full-Stack Developers.Software Engineers working with Node.js.Developers preparing for technical interviews.Programmers transitioning to Node.js development.Students and self-learners interested in backend development.Why Practice Node.js Interview Questions?Understanding Node.js concepts is important, but being able to apply that knowledge and answer technical questions is equally valuable.Regular practice can help you:Reinforce your understanding of Node.js concepts.Improve your technical problem-solving approach.Recognize common interview question patterns.Identify areas that require additional preparation.Build confidence when discussing Node.js development.Start Practicing Today!Take the next step in strengthening your Node.js knowledge with 350+ Node.js Interview Questions.Challenge yourself with 6 practice exams, explore detailed explanations, and evaluate your understanding of Node.js fundamentals, practical development, architecture, and advanced programming concepts.Enroll today and start preparing for your next Node.js technical interview!

PHP with MySQL 2022: Build 8 PHP and MySQL Projects

Udemy Instructor

Are you ready to skill up in programming? Do you have knowledge of PHP and MySQL and do not know what to do with them? Do you guidance on your way to building projects? If so, then this is the right place for you!! In this course, you will learn how to get out of the tutorial hell and how to approach real-world projects and get unstuck on your way to becoming a developer. After this course, you will simply be able to think like a programmer, and solving programming tasks will be no challenge for you.First of all, We will begin by building the most common feature of every website and which is the authentication system, which will allow you to learn about various things like password hashing and unhashing, validations, and sessions. For the second project, we are getting deep and we are building a posting system with comments with a focus on the comments and we are doing the whole thing using Ajax JQuery. And the third project is also about a rating system inside the blog itself and we are going to install a plugin along the way to do the design for us and we are going to do the backend from scratch. The next Project it's about a weather app and we are going to use an API for it, so that should be really cool. Another interesting project is also the CV creator that we are using a library for and that will allow us to deal with files within PHP

100 Web Development Projects in 100 Days

Udemy Instructor

This course contains the use of artificial intelligence.Turn your interest in coding into a job-ready portfolio with 100 Web Development Projects in 100 Days. This hands-on course helps beginners and aspiring developers learn web development by building practical projects every day. Instead of spending months watching theory-heavy lessons, you will create real websites, interactive applications, dashboards, productivity tools, API-powered projects, and full-stack platforms that demonstrate your skills.You will begin with beginner-friendly projects such as a personal profile page, portfolio website, digital business card, resume website, product landing page, restaurant homepage, photography gallery, pricing table, and event registration page. These projects will strengthen your understanding of HTML, CSS, responsive layouts, page structure, typography, forms, navigation, and modern user interface design.As you progress, you will use JavaScript to build interactive applications, including calculators, timers, random generators, a to-do list, notes app, habit tracker, quiz app, Pomodoro timer, expense tracker, password generator, image carousel, and form validation system. You will learn how to work with events, functions, arrays, objects, local storage, browser APIs, and dynamic page updates.The intermediate projects introduce API integration, data handling, search, filtering, dashboards, and advanced front-end development. You will build a weather dashboard, GitHub profile finder, movie search app, book search app, recipe finder, news aggregator, stock watchlist, cryptocurrency tracker, shopping cart, calendar planner, map-based location finder, and interactive chart dashboard. These projects show how modern web applications retrieve, process, and display real-time information.Later, you will create larger applications such as an admin dashboard, inventory management app, invoice generator, file upload manager, URL shortener, survey builder, support ticket interface, chatbot UI, and school or library management system. You will then move into advanced web development with real-time chat, team collaboration tools, a full-stack blog CMS, social media platform, learning management system, real estate marketplace, e-commerce store, Progressive Web App, and multiplayer browser game.The course follows a project-based path that gradually increases in complexity. You can build at your own pace, revisit earlier projects, customize features, and improve each application with your own branding and ideas. You will also learn to organize files, write cleaner code, test features, fix common errors, and present finished applications professionally.Throughout the course, you will practice responsive web design, front-end development, full-stack development, debugging, reusable components, user experience, accessibility, application architecture, version control, and project deployment. Each project helps you solve a real problem, improve your coding confidence, and add meaningful work to your portfolio.No professional programming experience is required. Basic computer skills, curiosity, and consistent practice are enough to begin. Whether you are learning for a new career, improving your current skills, preparing for interviews, or building products for clients, this course provides a structured roadmap from simple pages to production-style applications.This course is ideal for beginners, students, career changers, freelancers, and self-taught programmers who want to become confident web developers. By the end of 100 days, you will have built 100 projects, developed a strong GitHub portfolio, and gained practical experience for internships, freelance opportunities, junior developer roles, or your own digital products.Start building today and turn your web development knowledge into visible, career-focused results.

0.0•1.5K•Self-paced

FREE$94.99

Enroll

Python DSA: LEETCODE Exercises — Trees & Graphs

About this course

Skills you'll gain

Available Coupons