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Case Study

AI-Powered Study Quiz with RAG

Intelligent quiz application that generates personalized questions from study materials using RAG (Retrieval Augmented Generation), providing real-time feedback and source references to enhance learning efficiency.

The Challenge

Students struggle to effectively test their knowledge from study materials. Traditional methods require manual question creation, lack context-aware feedback, and don't provide direct references to source material when answers are incorrect. This leads to inefficient study sessions and difficulty identifying knowledge gaps.

The Solution

Built an intelligent RAG-powered quiz system that automatically ingests study documents, generates contextual multiple-choice questions using AI, and provides instant feedback with direct page references. The system uses semantic search to retrieve relevant document chunks, filters questions by specific books/documents, and tracks topic mastery with visual indicators. Students can upload their own materials, get personalized quizzes, and receive AI explanations pointing to exact source locations for incorrect answers.

Implementation Details

A full-stack AI-powered quiz platform that transforms study materials into interactive learning experiences. The application uses RAG architecture to ingest PDF and text documents, generate context-aware quiz questions using LangChain and xAI Grok, and provides detailed feedback with page-specific source references. Built with FastAPI backend serving a modern HTML/CSS/JS frontend, the system leverages Qdrant vector database for semantic search and HuggingFace embeddings for local, cost-effective document processing. Features include document upload management, book-specific quiz generation, real-time topic tracking, and intelligent answer validation with AI-generated explanations.

Technologies Used

FastAPI
LangChain
RAG (Retrieval Augmented Generation)
Qdrant
xAI Grok

Skills Applied

RAG Architecture
Vector Database Integration
FastAPI
Semantic Search

Results Achieved

Successfully deployed production-ready AI quiz application. Reduced quiz generation time from manual creation (hours) to automated AI generation (seconds). Students can now upload study materials, receive instant personalized quizzes, and get contextual feedback with direct source references. Deployed on Railway with Qdrant Cloud integration for persistent vector storage.

Project Walkthrough

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Challenges Faced

  • Book-specific question filtering not working correctly - questions were generated from all documents instead of selected book
  • Missing Qdrant payload index for metadata.source field required for MatchText filtering, causing Bad Request errors
  • Inconsistent UI feedback timing - explanations appearing late or showing 'null' for correct answers
  • SSL certificate verification errors when pushing to GitHub from sandboxed environments

Solutions Implemented

  • Implemented MatchText filter on metadata.source field in Qdrant retriever to ensure book-specific document retrieval, with debug logging to verify filtered sources
  • Added automatic payload index creation for metadata.source field using Qdrant's create_payload_index with TEXT index type and WORD tokenizer
  • Synchronized frontend UI updates with backend API responses - added loading spinners, disabled submit button during processing, and added null checks to prevent 'null' text display
  • Configured git to handle SSL verification issues and provided manual push instructions for authenticated environments

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