{
  "schemaVersion": 1,
  "id": "javascript-falsy-single-choice-example",
  "title": "JavaScript Falsy Value Example",
  "description": "A minimal public quiz example that shows the simplest single-choice contribution path with explanation-first feedback.",
  "language": "en",
  "tags": ["javascript", "basics", "types"],
  "questions": [
    {
      "id": "falsy-zero",
      "title": "Which value is falsy in JavaScript?",
      "description": "Choose the value that becomes false in a boolean context without any conversion helper.",
      "type": "single-choice",
      "options": [
        {
          "text": "`[]`",
          "isCorrect": false
        },
        {
          "text": "`0`",
          "isCorrect": true
        },
        {
          "text": "`{}`",
          "isCorrect": false
        },
        {
          "text": "`\"0\"`",
          "isCorrect": false
        }
      ],
      "explanation": "`0` is one of JavaScript's built-in falsy values. Arrays, objects, and non-empty strings are all truthy, so this question teaches learners to separate literal appearance from boolean behavior.",
      "references": "[MDN: Falsy](https://developer.mozilla.org/en-US/docs/Glossary/Falsy)"
    }
  ]
}