{
  "title": "Demo Pool: Generic Knowledge (10Q)",
  "score_fn": "linear_decay",
  "time_limit_default": 60,
  "questions": [
    {
      "id": "d01",
      "text": "Which of these is a programming language?",
      "options": {"A": "HTTP", "B": "Python", "C": "TCP", "D": "DNS"},
      "correct": "B",
      "explanation": "Python is a general-purpose programming language; the others are network protocols."
    },
    {
      "id": "d02",
      "text": "What is 2 + 2?",
      "options": {"A": "3", "B": "4", "C": "5", "D": "22"},
      "correct": "B",
      "explanation": "Basic arithmetic."
    },
    {
      "id": "d03",
      "text": "What is the capital of France?",
      "options": {"A": "Berlin", "B": "Madrid", "C": "Paris", "D": "Rome"},
      "correct": "C",
      "explanation": "Paris has been the capital of France since the 10th century."
    },
    {
      "id": "d04",
      "text": "Which planet is known as the Red Planet?",
      "options": {"A": "Venus", "B": "Mars", "C": "Jupiter", "D": "Saturn"},
      "correct": "B",
      "explanation": "Mars appears red because of iron-oxide dust on its surface."
    },
    {
      "id": "d05",
      "text": "Which HTTP status code means 'Not Found'?",
      "options": {"A": "200", "B": "301", "C": "404", "D": "500"},
      "correct": "C",
      "explanation": "404 is the canonical client-error response for a missing resource."
    },
    {
      "id": "d06",
      "text": "What does CPU stand for?",
      "options": {
        "A": "Central Processing Unit",
        "B": "Computer Personal Unit",
        "C": "Central Performance Utility",
        "D": "Core Programming Unit"
      },
      "correct": "A",
      "explanation": "The CPU is the primary component that executes program instructions."
    },
    {
      "id": "d07",
      "text": "Which sorting algorithm has the best average-case complexity?",
      "options": {
        "A": "Bubble sort",
        "B": "Selection sort",
        "C": "Quicksort",
        "D": "Insertion sort"
      },
      "correct": "C",
      "explanation": "Quicksort averages O(n log n); the others average O(n^2)."
    },
    {
      "id": "d08",
      "text": "Approximately what is the speed of light in vacuum (m/s)?",
      "options": {"A": "3 x 10^6", "B": "3 x 10^8", "C": "1.5 x 10^8", "D": "9.8"},
      "correct": "B",
      "explanation": "About 299,792,458 m/s, conventionally rounded to 3 x 10^8 m/s."
    },
    {
      "id": "d09",
      "text": "Which data structure operates strictly in Last-In-First-Out (LIFO) order?",
      "options": {"A": "Queue", "B": "Stack", "C": "Linked list", "D": "Hash map"},
      "correct": "B",
      "explanation": "A stack pushes and pops from the same end."
    },
    {
      "id": "d10",
      "text": "Which of the following is NOT an operating system?",
      "options": {"A": "Linux", "B": "Windows", "C": "Oracle", "D": "macOS"},
      "correct": "C",
      "explanation": "Oracle is a database management system, not an OS."
    }
  ]
}