{
  "week": 3,
  "title": "NumPy Essentials",
  "questions": [
    {
      "q": "NumPy is mainly used for?",
      "options": [
        "Web design",
        "Numerical computing",
        "Sending email",
        "Database backups"
      ],
      "answer": 1,
      "explanation": "NumPy is a numerical computing library."
    },
    {
      "q": "Which attribute gives array dimensions?",
      "options": [
        "shape",
        "size",
        "type",
        "length"
      ],
      "answer": 0,
      "explanation": "shape returns dimensions."
    },
    {
      "q": "Vectorized operations are usually?",
      "options": [
        "Slower",
        "Faster",
        "Invalid",
        "Only graphical"
      ],
      "answer": 1,
      "explanation": "Vectorization is usually faster."
    }
  ]
}