Question from the GraphQL test

{
  "data": {
    "user": {
      "name": "John Doe",
      "age": 30,
      "posts": [
        {
          "title": "My First Post",
          "content": "This is the content of my first post."
        },
        {
          "title": "Another Post",
          "content": "This is the content of another post."
        }
      ]
    }
  }
}

{
  "data": {
    "user": {
      "name": "John Doe",
      "age": 30,
      "posts": null
    }
  }
}

{
  "data": {
    "user": {
      "name": "John Doe",
      "age": 30
    }
  }
}