[Solved] What will be the output of this JavaScript code running on a Raspberry Pi browser? const ws = new WebSocket('ws://localhost:8080'); ws.onopen = () => ws.send('Ping'); ws.... | Raspberry Pi

Raspberry Pi - Web Server and API

What will be the output of this JavaScript code running on a Raspberry Pi browser? const ws = new WebSocket('ws://localhost:8080'); ws.onopen = () => ws.send('Ping'); ws.onmessage = (event) => console.log(event.data); // Assume server replies with 'Pong' to 'Ping'

APing

BPong

CError: WebSocket not defined

DNo output

Step-by-Step Solution

Solution:

Step 1: Analyze WebSocket events
On connection open, client sends 'Ping'. Server replies 'Pong'.
Step 2: Identify console output
onmessage logs the server's reply 'Pong'.
Final Answer:
Pong -> Option B
Quick Check:
onmessage logs server reply = Pong [OK]

Quick Trick: onmessage logs server reply, not sent message [OK]

Common Mistakes:

MISTAKES

Expecting 'Ping' to be logged
Confusing client send with server response
Assuming no output without error

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More Raspberry Pi Quizzes

What will be the output of this JavaScript code running on a Raspberry Pi browser?

Step 1: Analyze WebSocket events

Step 2: Identify console output

Final Answer:

Quick Check:

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