[Solved] What will be the output if you run this Flask-SocketIO code?@socketio.on('chat') def chat_handler(msg): socketio.emit('chat_response', msg)and a client sends 'chat' event with 'Hello'?... | Flask

Flask - WebSocket and Real-Time

What will be the output if you run this Flask-SocketIO code?

@socketio.on('chat')
def chat_handler(msg):
    socketio.emit('chat_response', msg)

and a client sends 'chat' event with 'Hello'? Assume no broadcast parameter is set.

ANo client receives any message

BOnly the sender client receives 'chat_response' with 'Hello'

CAll clients receive 'chat_response' with 'Hello'

DAn error occurs due to missing broadcast parameter

Step-by-Step Solution

Solution:

Step 1: Check emit call without broadcast
Without broadcast=True, emit sends message only to the sender client.
Step 2: Confirm no error occurs
Broadcast parameter is optional; omitting it defaults to sending only to sender.
Final Answer:
Only the sender client receives 'chat_response' with 'Hello' -> Option B
Quick Check:
emit without broadcast=True sends to sender only [OK]

Quick Trick: No broadcast means message goes only to sender [OK]

Common Mistakes:

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