Master Coding Interviews and Placements
Learn DSA systematically, practice targeted core subject interview questions, and access free placement roadmaps — all in one place.
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How It Works
your roadmap from zero to offer
Browse Topics
Explore DSA patterns, CS fundamentals, and interview Q&A — all organized by topic for efficient study.
Practice Problems
Solve hand-picked problems with solutions and complexity analysis. Track your progress topic by topic.
Crack Interviews
Use placement roadmaps, resume guides, and behavioral prep to land your dream SDE role.
Latest Articles
fresh content to sharpen your edge
LRU Cache Explained: HashMap + Doubly Linked List (Python Guide)
Learn how the LRU (Least Recently Used) Cache achieves constant-time get and put operations by combining a HashMap with a Doubly Linked List. This guide includes Python implementations, visual explanations, interview pitfalls, production-ready alternatives using OrderedDict, and real-world applications in Redis, databases, browsers, and operating systems.
Oracle Cloud Free Tier (2026): The Ultimate Guide to Free Deployment
Oracle Cloud's Always Free Tier offers one of the most generous permanent free cloud platforms available. Learn how to deploy Docker, Node.js, PostgreSQL, and full-stack applications on OCI's ARM instances while avoiding common pitfalls like capacity errors, firewall issues, and account restrictions.
Firebase vs Supabase vs Convex (2025): Which Backend Should You Choose?
Compare Firebase, Supabase, and Convex across database architecture, real-time features, authentication, pricing, developer experience, scalability, and vendor lock-in to choose the right Backend-as-a-Service for your next project.
Kadane's Algorithm Explained: Maximum Subarray Sum in O(N)
Master Kadane's Algorithm with an intuitive explanation, visual walkthrough, Python implementation, and interview tips. Learn how this elegant dynamic programming technique finds the maximum subarray sum in O(N) time while handling tricky edge cases like all-negative arrays.
Featured Placement Roadmaps
structured paths to land your dream job
30-Day DSA Sheet
A hand-picked checklist of the top 100 coding interview problems covering arrays, strings, trees, and dynamic programming.
60-Day Placement Guide
Comprehensive timeline covering DSA foundation, OS/DBMS revision, mock resumes, and behavioral interview prep.
SQL Mastery Roadmap
Step-by-step path to master complex joins, subqueries, indexing, database design, and query optimization.