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Salesforce JavaScript-Developer-I exam is a multiple-choice exam that consists of 60 questions. The time limit for the exam is 105 minutes, and candidates must score at least 68% to pass. JavaScript-Developer-I Exam is available in English, Japanese, and Spanish, and it is proctored online.

Salesforce Certified JavaScript Developer I Exam Sample Questions (Q40-Q45):

NEW QUESTION # 40
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 the server
* 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?

A. try{
ws.connect (( ) => {
console.log('connected to client'); });
} catch(error) { console.log('ERROR' , error); };
}
B. ws.connect (( ) => {
console.log('connected to client'); }).catch((error) => { console.log('ERROR' , error); }};
C. ws.on ('connect', ( ) => { console.log('connected to client'); }}; ws.on('error', (error) => { console.log('ERROR' , error); }};
D. ws.on ('connect', ( ) => {
console.log('connected to client'); ws.on('error', (error) => { console.log('ERROR' , error); });
});

Answer: C

NEW QUESTION # 41
A team that works on a big project uses npm to deal with projects dependencies.
A developer added a dependency does not get downloaded when they execute npm install.
Which two reasons could be possible explanations for this?
Choose 2 answers

A. The developer missed the option --add when adding the dependency.
B. The developer added the dependency as a dev dependency, and NODE_ENV is set to production.
C. The developer added the dependency as a dev dependency, and NODE_ENV Is set to production.
D. The developer missed the option --save when adding the dependency.

Answer: B,C,D

NEW QUESTION # 42
Refer to the code below:
01 const server = require('server');
02 /* Insert code here */
A developer imports a library that creates a web server. The imported library uses events and
callbacks to start the servers
Which code should be inserted at the line 03 to set up an event and start the web server ?

A. server()
B. server.on(' connect ' , ( port) => {
console.log('Listening on ' , port) ;})
C. console.log( 'Listening on ', port) ;
D. Server.start ();
E. serve(( port) => (

Answer: B

NEW QUESTION # 43
A developer has the function, shown below, that is called when a page loads.
function onload() {
console.log("Page has loaded!");
}
Where can the developer see the log statement after loading the page in the browser?

A. Browser performance toots
B. On the webpage.
C. Browser javaScript console
D. Terminal running the web server.

Answer: C

NEW QUESTION # 44
Refer to thefollowing code that imports a module named utils:
import (foo, bar) from '/path/Utils.js';
foo() ;
bar() ;
Which two implementations of Utils.js export foo and bar such that the code above runs without error?
Choose 2 answers

A. // FooUtils.js and BarUtils.js existImport (foo) from '/path/FooUtils.js';Import (boo) from '
/path/NarUtils.js';
B. const foo = () => { return 'foo' ; }const bar = () => { return 'bar' ; }export { bar, foo }
C. Export default class {foo() { return 'foo' ; }bar() { return 'bar' ; }}
D. const foo = () => { return 'foo';}const bar = () => {return 'bar'; }Export default foo, bar;

Answer: B,C

NEW QUESTION # 45
......

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Salesforce Certified JavaScript Developer I Exam Sample Questions (Q40-Q45):

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