A developer is setting up a new Node.

Question

A developer is setting up a new Node.js server with a client library that is built using events and callbacks.
The library:
● Will establish a web socket connection and handle receipt of messages to theserver
● Will be imported with require, and made available with a variable called we.
The developer also wants to add error logging if a connection fails.
Given this info, which code segment shows the correct way to set up a client with two events that listen at execution time?

Accepted Answer

C. try{ws.connect(( ) => {console.log(‘connected to client’); });} catch(error) { console.log(‘ERROR’ ,error); };}

Answer

A. ws.connect (( ) => {console.log(‘connected to client’); }).catch((error) => { console.log(‘ERROR’ , error); }};

Answer

B. ws.on (‘connect’, ( )=> {console.log(‘connected to client’); ws.on(‘error’, (error) => { console.log(‘ERROR’ ,error); });}); C. ws.on (‘connect’, ( ) => { console.log(‘connected to client’); }}; ws.on(‘error’, (error) => { console.log(‘ERROR’ , error); }};

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Salesforce Developer JavaScript-Developer-I Question # 45 Topic 5 Discussion

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