The latest articles on DEV Community by Arka Roy (@arkacoder). https://dev.to/arkacoder https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3958480%2F159bc6ec-9ee6-4353-9cb1-0854ef46cba6.jpeg https://dev.to/arkacoder en Arka Roy Sun, 07 Jun 2026 05:28:11 +0000 https://dev.to/arkacoder/placement-prep-assistant-rag-based-chatbot-for-dsa-dbms-os-oop-ml-hgb https://dev.to/arkacoder/placement-prep-assistant-rag-based-chatbot-for-dsa-dbms-os-oop-ml-hgb <p><em>This is a submission for the [GitHub Finish-Up-A-Thon Challenge]<br> <a href="https://github.com/arka-coder/Placement-Prep-Assistant" rel="noopener noreferrer">https://github.com/arka-coder/Placement-Prep-Assistant</a></em></p> <h2> What I Built </h2> <p>The Placement Prep Assistant is a Retrieval-Augmented Generation (RAG) chatbot that helps you prepare for technical interviews. Ask any question on DSA, DBMS, OS, OOP, or Machine Learning and get a structured, interview-ready answer — complete with definitions, explanations, real-world examples, interview tips, curated reading links, and YouTube video recommendations.</p> <h2> Demo </h2> <p><a href="https://placement-prep-assistant-aapptwyurpe5yl8rpealcph.streamlit.app/" rel="noopener noreferrer">https://placement-prep-assistant-aapptwyurpe5yl8rpealcph.streamlit.app/</a></p> <h2> The Comeback Story </h2> <p>The ui of the project was not good before, beside this it doesn't provide proper valuable definitions, so i fixed the ui, and the RAG system and add one more thing which is youtube recommendations.</p> <h2> My Experience with GitHub Copilot </h2> <p>Github really helped me a lot of things like when API doesn't work, when there are lot of bugs, so yah it helps me a lot.</p> devchallenge githubchallenge