To master DSA, LeetCode, and Data Structures and Algorithms in 2026, I tested 50+ courses and found these 5 Hidden Gems that enable Company-Specific prep for Google, Amazon & Microsoft. Get the Roadmap, Striver Sheet, and the right practice Method to beat 80% of developers!
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FREE Resources
Roadmaps (Beginner-Friendly):
roadmap.sh
📋 Practice Sheets:
github.com/pratirath06/StriversA2Z_DSA
🛠️ Practice Platforms:
leetcode.com (Interview Prep)
codeforces.com (Competitive Programming)
hackerrank.com/research/developer-skills/2023 (Company-Specific Tests)
cses.fi/problemset (Progressive Problems)
codeforces.com/edu/courses (Structured Courses)
exercism.org (Mentored Practice)
🎥 Hindi YouTube Channels (for Concept Clarity):
/ @theadityaverma (Aditya Verma)
/ @striver_79 (Striver - Raj Vikramaditya)
/ @codehelp (CodeHelp by Luv Babbar)
🐍 For Python Lovers:
neetcode.io
☕ For Java & Concepts:
/ pepcoding (Pepcoding)
/ @kunalkushwaha (Kunal Kushwaha)
/ @chaiaurcode (Hitesh Choudhary - Chai Aur Code)
💻 Articles and Advanced Theory:
geeksforgeeks.org
github.com/cp-algorithms/cp-algorithms
usaco.guide
codeforces.com/blog/entry/91363
🎯 Company-specific Preparation:
Google - glassdoor.com/Interview/Only-DSA-questions-first-interview-related-to-graphs-and-trees-second-interview-mainly-array-and-common-sense-based-QTN_8027968.htm
Amazon - glassdoor.com/Interview/There-were-questions-on-Binary-search-trees-hash-maps-tables-functions-complexity-recursion-and-other-data-structures-QTN_625718.htm
Microsoft - glassdoor.com/Interview/Trees-Graphs-DP-Sorting-and-complexity-analysis-QTN_5997636.htm
Meta/Facebook - glassdoor.com/Interview/-graphs-and-storing-unique-words-QTN_4893916.htm
🎓 Complete Beginner? Try:
pll.harvard.edu/course/cs50-introduction-computer-science
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