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  • Questions: 219 Q&A's With Detailed Explanation
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  • Exam Name: Salesforce Certified JavaScript Developer I (SP24)
  • Last Update: 10-Sep-2024
  • Questions and Answers: 219
  • Single Choice: 163 Q&A's
  • Multiple Choice: 51 Q&A's

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JavaScript-Developer-I Questions and Answers

Question # 1

Refer to the code below:

let timeFunction =() => {

console.log(‘Timer called.”);

};

let timerId = setTimeout (timedFunction, 1000);

Which statement allows a developer to cancel the scheduled timed function?

A.

removeTimeout(timedFunction);

B.

removeTimeout(timerId);

C.

clearTimeout(timerId);

D.

clearTimeout(timedFunction);

Question # 2

A developer wants to use a module named universalContainersLib and then call functions from it.

How should a developer import every function from the module and then call the functions foo and bar?

A.

import * from '/path/universalContainersLib.js';universalContainersLib. foo ()7universalContainersLib.bar ();

B.

import {foo,bar} from '/path/universalCcontainersLib.js';foo():bar()?

C.

import all from '/path/universalContainersLib.js';universalContainersLib.foo();universalContainersLib.bar ();

D.

import * as lib from '/path/universalContainersLib.js';lib.foo();lib. bar ();

Question # 3

A developer has the following array of hourly wages:

Let arr = (8, 5, 9, 75, 11, 25, 7, 75, , 13, 25);

For workers making less than $10 an hour rate should be multiple by 1.25 and returned in a new array.

How should the developer implement the request?

A.

let arrl = arr.filter((val) => val < 10).map((num) -> num = 1.25);

B.

let arrl = arr .rr.acArray ((val) => ( val < 10 )) ,map((num) => { num * 1.25 ));

C.

let arrl = arr-map((num) => { return ran * 1.25 }).filter((val) -> { return val < 10));

D.

let arrl = arr.filterBy((val) => val < 10 ).aapBy<(num) -> num = ..25 );

Question # 4

developer is trying to convince management that their team will benefit from using

Node.js for a backend server that they are going to create. The server will be a web server that

handles API requests from a website that the teamhas already built using HTML, CSS, and

JavaScript.

Which three benefits of Node.js can the developer use to persuade their manager?

Choose 3 answers:

A.

Installs with its own package manager to install and manage third-party libraries.

B.

Ensures stabilitywith one major release every few years.

C.

Performs a static analysis on code before execution to look for runtime errors.

D.

Executes server-side JavaScript code to avoid learning a new language.

E.

Uses non-blocking functionality for performant requesthandling .

Question # 5

Refer to the code below:

JavaScript-Developer-I question answer

Which value can a developer expect when referencing country,capital,cityString?

A.

'London'

B.

undefined

C.

An error

D.

'NaN'

View More JavaScript-Developer-I Questions

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JavaScript-Developer-I Testimonials

profile 1
be  Cameron
posted on 05-Dec-2022
5 Stars

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profile 2
mk  Willey
posted on 24-Nov-2022
5 Stars

Failed twice in my exam Salesforce Certified JavaScript Developer I and its exam code JavaScript-Developer-I and when prepared from crack4sure passed with high marks.

profile 3
nr  Smith
posted on 08-Mar-2022
5 Stars

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