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📝 Parottasalna Blog

248 practical articles on backend engineering, system design, databases, Docker, Python, AI and DSA, explained simply.

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Data Science

MovieLens 360: User Retention, Recommendation & Engagement Analytics

Imagine You are working as a Data Scientist in “StreamFlix” – a Netflix-like platform Management Problems Users install app → watch few movies → disa…

Feb 5, 2026 · 2 min read