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Which of the following is the correct syntax to broadcast a message 'Hello' on event 'greet' using Flask-SocketIO?

easy📝 Syntax Q3 of 15
Flask - WebSocket and Real-Time
Which of the following is the correct syntax to broadcast a message 'Hello' on event 'greet' using Flask-SocketIO?
Asocketio.send('greet', 'Hello', broadcast=True)
Bsocketio.broadcast('greet', 'Hello')
Csocketio.emit('greet', 'Hello', broadcast=True)
Dsocketio.emit('Hello', 'greet', broadcast=True)
Step-by-Step Solution
Solution:

  1. Step 1: Identify correct method and parameters

    emit(event, message, broadcast=True) is correct syntax for broadcasting.

  2. Step 2: Validate event and message order

    Event name is first argument, message second; send does not support broadcast; broadcast method does not exist.

  3. Final Answer:

    socketio.emit('greet', 'Hello', broadcast=True) -> Option C

  4. Quick Check:

    emit(event, message, broadcast=True) is correct [OK]
Quick Trick: emit(event, message, broadcast=True) sends to all [OK]
Common Mistakes:
MISTAKES
  • Swapping event and message arguments
  • Using send instead of emit for broadcast
  • Using non-existent broadcast method

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