[
  {
    "id": 1,
    "question": "What is a distributed system?",
    "options": {
      "A": "A single powerful computer running multiple programs",
      "B": "A collection of multiple computers that appears as one system",
      "C": "A system that only runs on cloud providers",
      "D": "A decentralized blockchain network"
    }
  },
  {
    "id": 2,
    "question": "What is horizontal scaling?",
    "options": {
      "A": "Adding more CPU and RAM to a single machine",
      "B": "Replacing hardware with faster SSDs",
      "C": "Adding more machines to improve performance",
      "D": "Upgrading the operating system"
    }
  },
  {
    "id": 3,
    "question": "Which is true about distributed systems compared to monolithic systems?",
    "options": {
      "A": "They are more resilient but more complex",
      "B": "They always have a single point of failure",
      "C": "They cannot scale horizontally",
      "D": "They require downtime for maintenance"
    }
  },
  {
    "id": 4,
    "question": "Which statement about distributed vs decentralized systems is correct?",
    "options": {
      "A": "Every distributed system is decentralized",
      "B": "A decentralized system must be distributed",
      "C": "A distributed system must have no central authority",
      "D": "They are identical concepts"
    }
  },
  {
    "id": 5,
    "question": "According to the Fallacies of Distributed Computing, which of these is a false assumption developers often make?",
    "options": {
      "A": "The network is reliable",
      "B": "Latency is zero",
      "C": "Bandwidth is infinite",
      "D": "All of the above"
    }
  },
  {
    "id": 6,
    "question": "In Proof of Work (PoW), miners:",
    "options": {
      "A": "Stake their coins",
      "B": "Solve cryptographic puzzles",
      "C": "Vote on transactions",
      "D": "Approve all transactions"
    }
  },
  {
    "id": 7,
    "question": "What is the smallest unit of Bitcoin?",
    "options": {
      "A": "Wei",
      "B": "Gwei",
      "C": "Ether",
      "D": "Satoshi"
    }
  },
  {
    "id": 8,
    "question": "What is Gas in Ethereum?",
    "options": {
      "A": "A blockchain explorer",
      "B": "A wallet feature",
      "C": "The fee required to execute transactions",
      "D": "A mining pool"
    }
  },
  {
    "id": 9,
    "question": "A crypto wallet actually stores:",
    "options": {
      "A": "The coins themselves",
      "B": "A copy of the blockchain",
      "C": "Private and public keys",
      "D": "Mining rewards"
    }
  },
  {
    "id": 10,
    "question": "With synchronous communication:",
    "options": {
      "A": "The sender does not wait",
      "B": "The sender waits for a response",
      "C": "All messages go through a broker",
      "D": "There is no temporal coupling"
    }
  },
  {
    "id": 11,
    "question": "In basic Pub/Sub, when a message is published to a topic:",
    "options": {
      "A": "The broker deletes it immediately",
      "B": "The producer processes it",
      "C": "Only one subscriber receives the message (Point-to-Point)",
      "D": "All subscribers interested in that topic receive a copy"
    }
  },
  {
    "id": 12,
    "question": "What is exponential backoff used for?",
    "options": {
      "A": "Waiting progressively longer between retries",
      "B": "Synchronizing clocks",
      "C": "Reducing memory usage",
      "D": "Increasing blockchain throughput"
    }
  }
]