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Salesforce JavaScript-Developer-I Exam is a certification exam designed to test a candidate's knowledge and skills in developing applications using JavaScript in the Salesforce platform. JavaScript-Developer-I exam is intended for individuals who have experience in developing custom applications in Salesforce using JavaScript and are seeking to prove their expertise in this area. The Salesforce Certified JavaScript Developer I credential is recognized as a valuable certification by employers and can help individuals advance their careers in Salesforce development.

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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 (JS-Dev-101) Sample Questions (Q41-Q46):

NEW QUESTION # 41
Given the code below.

What is logged to the console?

A. 0
B. 1
C. 2
D. 3

Answer: A

NEW QUESTION # 42
Refer to the code below:
let car1 = new Promise((_ ,reject)=> setTimeout(reject,2000,"Car1 crashed in")); let car2 = new Promise(resolve => setTimeout(resolve,1500,"Car2 completed")); let car3 = new Promise(resolve => setTimeout(resolve,3000,"Car3 completed")); Promise.race([car1,car2,car3])
.then(value=>{
let result = `${value} the race.`;
}).catch(err=>{
console.log('Race is cancelled.',err);
});
What is the value of result when promise.race execues?

A. Car2 completed the race.

Answer: A

NEW QUESTION # 43
A developer is debugging a web server that uses Node.js. The server hits a runtime error every third request to an important endpoint on the web server.
The developer added a break point to the start script, that is at index, js at the root of the server's source code. The developer wants to make use of Chrome DevTools to debug.
Which command can be run to access DevTools and make sure the breakpoint is hit?

A. Node inspect index , js
B. Node --inspect -brk index , js
C. Node -I index , js
D. Node -- inspect index ,js

Answer: D

NEW QUESTION # 44
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.start ();
B. server.on(' connect ' , ( port) => {
console.log('Listening on ' , port) ;})
C. console.log( 'Listening on ', port) ;
D. serve(( port) => (
E. server()

Answer: B

NEW QUESTION # 45
Which two implementations of utils.js support foo and bar?

A. export default class {
foo() { return ' foo ' ; }
bar() { return ' bar ' ; }
}
B. const foo = () = > { return ' foo ' ; };
const bar = () = > { return ' bar ' ; };
export default { foo, bar };
C. import { foo, bar } from " ./helpers/utils.js " ;
export { foo, bar };
D. const foo = () = > { return ' foo ' ; };
const bar = () = > { return ' bar ' ; };
export { foo, bar };

Answer: C,D

Explanation:
The correct answers are A and C because both use named exports for foo and bar.
A module can export multiple values by name:
export { foo, bar };
This allows another file to import them like this:
import { foo, bar } from ' ./utils.js ' ;
Option A is correct because it defines both functions locally and exports both of them as named exports.
const foo = () = > { return ' foo ' ; };
const bar = () = > { return ' bar ' ; };
export { foo, bar };
Option C is also correct after correcting the typing issue so that both foo and bar are imported first:
import { foo, bar } from " ./helpers/utils.js " ;
export { foo, bar };
This is called re-exporting. The module imports foo and bar from another module, then exports them again from utils.js.
Option B is not the best answer for named access because it exports one default object:
export default { foo, bar };
That would require a default import first:
import utils from ' ./utils.js ' ;
utils.foo();
utils.bar();
It does not directly support named imports in the same way as:
import { foo, bar } from ' ./utils.js ' ;
Option D exports a default class. Its foo() and bar() are class instance methods, not named exported functions.
It would require usage like:
import Utils from ' ./utils.js ' ;
const utils = new Utils();
utils.foo();
utils.bar();
So for direct multiple function exports, the correct implementations are A and C .

NEW QUESTION # 46
......

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