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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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
Prefix Sum vs Difference Array: Master Range Queries and Range Updates in DSA
Struggling with Time Limit Exceeded (TLE) errors in array problems? Learn how Prefix Sums and Difference Arrays transform expensive O(N×Q) solutions into efficient O(N+Q) algorithms. This guide covers the intuition, formulas, Python implementations, complexity analysis, and interview tips you need to master both techniques.
Razorpay Django Integration: Secure Payment Gateway with Signature Verification
Integrating Razorpay into Django isn't just about opening a checkout popup—it's about building a secure payment workflow. This step-by-step guide walks you through creating Razorpay orders, implementing the checkout page, verifying payment signatures on the backend, and preparing your application for production with webhooks, refunds, and idempotency.
Building a REST API from Scratch: A Step-by-Step Guide
Learn how to build a REST API from scratch using Node.js and Express.js. This beginner-friendly guide walks through creating a complete CRUD API, handling HTTP requests, testing with Postman, and preparing your application for production with best practices.
Introduction to GraphQL: The Future of API Design
GraphQL is revolutionizing API design by allowing clients to request exactly the data they need in a single query. Learn how GraphQL solves REST's over-fetching and under-fetching problems, understand its core concepts like schemas, queries, mutations, and resolvers, and discover when it's the right choice for modern web and mobile applications.
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.