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class="mod-progress-header"> <span class="mod-progress-title">YOUR PROGRESS — GENERATIVE AI: ZERO TO JOB-READY</span> <a href="https://chandrashaker.in/courses/genai/" style="font-size:12px;color:#1565C0;text-decoration:none;font-weight:600">&#8592; Course home</a> </div> <div class="mod-progress-bg"> <div class="mod-progress-fill" style="width:60%"></div> </div> <div style="font-size:12px;color:#FF8C00;font-weight:600;margin-bottom:10px">12 of 20 modules complete</div> <div class="mod-progress-units"> <a class="mod-progress-unit done" href="https://chandrashaker.in/courses/genai/#module-1">Understanding GenAI ✓</a> <a class="mod-progress-unit done" href="https://chandrashaker.in/courses/genai/#module-2">Prompt Engineering ✓</a> <a class="mod-progress-unit done" href="https://chandrashaker.in/courses/genai/#module-3">GenAI for Your Job ✓</a> <a class="mod-progress-unit current" href="https://chandrashaker.in/courses/genai/#module-4">Advanced Techniques</a> <a class="mod-progress-unit upcoming" href="https://chandrashaker.in/courses/genai/#module-5">Career & India</a> </div> </div> <div class="mod-header"> <div class="mod-header-left"> <span class="mod-breadcrumb">GENERATIVE AI: ZERO TO JOB-READY &nbsp;›&nbsp; UNIT 4 &nbsp;›&nbsp; MODULE 1 OF 4</span> <h1 class="mod-title-inline">RAG — Retrieval Augmented Generation Explained Simply</h1> </div> <div class="mod-meta"> <span class="mod-meta-item">⏱ 14 min read</span> <span class="mod-meta-item">📝 Assignment inside</span> <span class="mod-meta-item">No coding required</span> </div> </div> <p>Welcome to Unit 4. In Units 1–3 you built prompt engineering skills and applied them to real work. Unit 4 goes deeper into how enterprise AI actually works — the architectures and techniques that power the AI systems being built at TCS, Infosys, Wipro, and HCL right now.</p>