Quiz Study Assistant

A Svelte-based web application for efficient exam preparation through adaptive quiz repetition.

Features

• 📁 JSON file management
  • Load multiple quiz files
  • Group quizzes by category
  • Persistent local storage
• 🧠 Adaptive learning algorithm
  • Focus on weak areas
  • Spaced repetition system
• 📊 Progress tracking
  • Real-time performance stats
  • Session persistence
  • Historical success rates
• 🎯 Quiz interface
  • Multiple choice questions
  • Instant feedback
  • Progress indicator

Project Structure

/src ├── lib │ ├── components │ │ ├── FileUploader.svelte // Drag-and-drop JSON upload │ │ ├── QuizSelector.svelte // Quiz category selection │ │ └── QuestionInterface.svelte // Main quiz UI │ ├── services │ │ ├── storage.js // localStorage wrapper │ │ └── algorithm.js // Question weighting logic │ └── stores │ └── quizStore.js // Svelte store for state management └── routes └── +page.svelte // Main entry point

## Key Implementation Details

### Adaptive Algorithm (`algorithm.js`)

```javascript
function createQuestionQueue(questions, stats) {
return questions.flatMap(q => {
const successRate = stats[q.id]?.successRate || 0;
const weight = Math.max(1, 5 - Math.floor(successRate 5));
return Array(weight).fill(q);
}).sort(() => Math.random() - 0.5);
}
function updateStats(stats, questionId, isCorrect) {
const entry = stats[questionId] || { attempts: 0, correct: 0 };
entry.attempts++;
if(isCorrect) entry.correct++;
entry.successRate = entry.correct / entry.attempts;
return { ...stats, [questionId]: entry };
}

Data Persistence (storage.js)

const QUIZ_STORAGE_KEY = 'quizData';
const STATS_STORAGE_KEY = 'quizStats';

export const storage = {
  saveQuizzes(quizzes) {
    localStorage.setItem(QUIZ_STORAGE_KEY, JSON.stringify(quizzes));
  },
  loadQuizzes() {
    return JSON.parse(localStorage.getItem(QUIZ_STORAGE_KEY) || '[]');
  },
  saveStats(stats) {
    localStorage.setItem(STATS_STORAGE_KEY, JSON.stringify(stats));
  },
  loadStats() {
    return JSON.parse(localStorage.getItem(STATS_STORAGE_KEY) || '{}');
  }
};

JSON File Format

[
  {
    "id": "unique-question-id",
    "question": "Question text",
    "options": [
      {
        "key": "a",
        "text": "Option text"
      }
    ],
    "correct_answer": "a"
  }
]

Development Setup

npm install
npm run dev

Future Enhancements

• Dark mode toggle
• Progress visualization charts
• Export/import statistics
• Question type variants (true/false, multi-select)