Quiz JSON Support

VS code marketplace

Provides validation and IntelliSense for .quiz.json files in Visual Studio Code.

This extension enforces a strict quiz structure using JSON Schema to ensure quizzes are properly formatted, validated, and error-free.

✨ Features

• ✅ Strict quiz structure validation
• ✅ Identification and Multiple Choice support
• ✅ Exactly 4 options required for multiple choice
• ✅ Correct answer must match index (0–3)
• ✅ No extra properties allowed
• ✅ IntelliSense support
• ✅ Real-time error highlighting

📦 Installation

1. Open Extensions in VS Code.
2. Search for: Quiz JSON Support
3. Click Install

Or install via command line:

code --install-extension onyekachiukwu.quiz-json-formatter

📁 File Format

This extension automatically validates files that match:

*.quiz.json

Example:

math.quiz.json

🧠 Quiz Structure Guide

A quiz file must follow this structure:

{
  "title": "Quiz Title",
  "questions": []
}

🏷 Question Types

📝 Identification Question (type: 0)

Used for short-answer questions.

Required Fields

• type → must be 0
• question → string
• answer → string

Example

{
  "type": 0,
  "question": "What is 2 + 2?",
  "answer": "4"
}

🔘 Multiple Choice Question (type: 1)

Used for objective questions with exactly four options.

Required Fields

• type → must be 1
• question → string
• options → array of exactly 4 non-empty strings
• correctAnswer → integer (0–3)

Rules

• You must provide exactly 4 options

• No option can be empty

• correctAnswer must match the index of the correct option:

  • 0 = first option
  • 1 = second option
  • 2 = third option
  • 3 = fourth option

Example

{
  "type": 1,
  "question": "Capital of France?",
  "options": ["Paris", "Rome", "Berlin", "Madrid"],
  "correctAnswer": 0
}

⚠ Validation Rules Enforced

This extension automatically checks:

• Quiz must contain a title

• Quiz must contain a questions array

• At least one question must exist

• Identification questions must include answer

• Multiple choice must:

  • Have exactly 4 options
  • Have no empty options
  • Use correctAnswer between 0 and 3

• No extra properties are allowed

• Invalid type values are rejected

Errors appear as red underlines in VS Code.

📦 Full Sample Quiz (20 Questions)

{
  "title": "General Knowledge Quiz",
  "questions": [
    {
      "type": 0,
      "question": "What is the square root of 64?",
      "answer": "8"
    },
    {
      "type": 1,
      "question": "Which planet is known as the Red Planet?",
      "options": ["Earth", "Mars", "Jupiter", "Saturn"],
      "correctAnswer": 1
    },
    {
      "type": 0,
      "question": "Who wrote Romeo and Juliet?",
      "answer": "William Shakespeare"
    },
    {
      "type": 1,
      "question": "Which gas do plants absorb from the atmosphere?",
      "options": ["Oxygen", "Carbon Dioxide", "Hydrogen", "Nitrogen"],
      "correctAnswer": 1
    },
    {
      "type": 0,
      "question": "What is 9 squared?",
      "answer": "81"
    },
    {
      "type": 1,
      "question": "Which continent is the Sahara Desert located in?",
      "options": ["Asia", "Europe", "Africa", "Australia"],
      "correctAnswer": 2
    },
    {
      "type": 0,
      "question": "What is the capital of Japan?",
      "answer": "Tokyo"
    },
    {
      "type": 1,
      "question": "Which metal is liquid at room temperature?",
      "options": ["Iron", "Mercury", "Copper", "Aluminum"],
      "correctAnswer": 1
    },
    {
      "type": 0,
      "question": "What is 15 × 3?",
      "answer": "45"
    },
    {
      "type": 1,
      "question": "Which programming language runs in the browser?",
      "options": ["Python", "C++", "Java", "JavaScript"],
      "correctAnswer": 3
    },
    {
      "type": 0,
      "question": "How many continents are there?",
      "answer": "7"
    },
    {
      "type": 1,
      "question": "Which organ pumps blood through the body?",
      "options": ["Brain", "Heart", "Lungs", "Kidney"],
      "correctAnswer": 1
    },
    {
      "type": 0,
      "question": "What is the chemical symbol for Gold?",
      "answer": "Au"
    },
    {
      "type": 1,
      "question": "Which country is home to the Great Pyramid of Giza?",
      "options": ["India", "Egypt", "Mexico", "Peru"],
      "correctAnswer": 1
    },
    {
      "type": 0,
      "question": "Who painted the Mona Lisa?",
      "answer": "Leonardo da Vinci"
    },
    {
      "type": 1,
      "question": "Which language is primarily spoken in Brazil?",
      "options": ["Spanish", "Portuguese", "French", "English"],
      "correctAnswer": 1
    },
    {
      "type": 0,
      "question": "What is the boiling point of water in Celsius?",
      "answer": "100"
    },
    {
      "type": 1,
      "question": "Which device measures temperature?",
      "options": ["Barometer", "Thermometer", "Altimeter", "Hygrometer"],
      "correctAnswer": 1
    },
    {
      "type": 0,
      "question": "What is the largest mammal in the world?",
      "answer": "Blue Whale"
    },
    {
      "type": 1,
      "question": "Which ocean is the largest?",
      "options": ["Atlantic", "Indian", "Pacific", "Arctic"],
      "correctAnswer": 2
    }
  ]
}

💡 Best Practices

• Keep questions clear and concise
• Avoid duplicate options
• Double-check correctAnswer index
• Use descriptive quiz titles
• Keep formatting clean and readable

📄 License

MIT License

🤝 Contributing

Contributions, suggestions, and improvements are welcome.

Feel free to open issues or submit pull requests on GitHub.

Github here