[Solved] Given this Flask-SocketIO code snippet, what will happen when a client sends a message to the server?from flask_socketio import SocketIO, send socketio = SocketIO(app) @socketio.... | Flask

Flask - WebSocket and Real-Time

Given this Flask-SocketIO code snippet, what will happen when a client sends a message to the server?

from flask_socketio import SocketIO, send

socketio = SocketIO(app)

@socketio.on('message')
def handle_message(msg):
    send(f'Received: {msg}', broadcast=True)

AThe server sends back the message only to the sender.

BThe server broadcasts the received message to all connected clients.

CThe server ignores the message and sends no response.

DThe server crashes due to missing return statement.

Step-by-Step Solution

Solution:

Step 1: Understand the @socketio.on decorator
This listens for 'message' events from clients and triggers handle_message.
Step 2: Analyze the send function with broadcast=True
send() with broadcast=True sends the message to all connected clients, not just the sender.
Final Answer:
The server broadcasts the received message to all connected clients. -> Option B
Quick Check:
send with broadcast=True = broadcast message [OK]

Quick Trick: broadcast=True means send to all clients [OK]

Common Mistakes:

MISTAKES

Thinking message goes only to sender
Assuming server crashes without return
Believing server ignores the message

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More Flask Quizzes

Given this Flask-SocketIO code snippet, what will happen when a client sends a message to the server?

Step 1: Understand the @socketio.on decorator

Step 2: Analyze the send function with broadcast=True

Final Answer:

Quick Check:

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