LeetCode
Free LeetCode PDFs - Roadmaps, DSA Sheets & Interview Patterns
LeetCode is the #1 platform for coding interview preparation . From Amazon to Google, nearly every tech company pulls i…
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04 May
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Machine-Learning
Free Machine Learning PDFs - Algorithms, Projects & Concepts
Machine Learning (ML) is the backbone of modern AI systems . From personalized recommendations on Netflix to fraud dete…
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04 May
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TestNG
Free TestNG PDFs - Annotations, Selenium, CI/CD & Interview Q&A
TestNG is one of the most powerful testing frameworks for Java-based automation. It’s widely used with Selenium , inte…
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04 May
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Cybersecurity
Free Cybersecurity PDFs - Hacking, Threats, and Interview Q&A
Cybersecurity is no longer optional. In a world where data breaches, phishing attacks, and ransomware are daily news, c…
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04 May
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System-Design
Free System Design PDFs - Interviews, Architecture & Case Studies
System Design is the final boss of tech interviews —and the gateway to becoming a senior engineer, SDE-2, or solution a…
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04 May
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Free Cloud Computing PDFs - SaaS, Models, MCQs & Architecture
Cloud Computing has revolutionized the way technology operates. From Netflix streaming to Google Docs collaboration—eve…
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04 May
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DSA
Free Data Structures PDFs - Arrays, Trees, Graphs & Interview Q&A
Data Structures are the backbone of efficient coding . Whether you’re applying for tech jobs, preparing for competitive…
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04 May
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Operating-System
Free Operating System PDFs - Scheduling, Memory, Q&A & Notes
Operating Systems (OS) are the heart of all computing devices , from your laptop to your smartphone to enterprise serve…
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04 May
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