Assume Salesforce JavaScript-Developer-I Dumps PDF Are going to be The Best Score [Q25-Q40]

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Assume Salesforce JavaScript-Developer-I Dumps PDF Are going to be The Best Score

Salesforce Developer JavaScript-Developer-I Exam and Certification Test Engine

NEW QUESTION 25
developer wants to use a module named universalContainersLib and them call functions
from it.
How should a developer import every function from the module and then call the fuctions foo
and bar ?

import * ad lib from ‘/path/universalContainersLib.js’;
lib.foo();
lib.bar();

import (foo, bar) from ‘/path/universalContainersLib.js’;
foo();
bar();

import all from ‘/path/universalContaineraLib.js’;
universalContainersLib.foo();
universalContainersLib.bar();

import * from ‘/path/universalContaineraLib.js’;
universalContainersLib.foo();
universalContainersLib.bar();

NEW QUESTION 26
A developer is leading the creation of a new browser application that will serve a single
page application. The team wants to use a new web framework Minimalsit.js. The Lead
developer wants to advocate for a more seasoned web framework that already has a
community around it.
Which two frameworks should the lead developer advocate for?
Choose 2 answers

Vue

Angular

Koa

Express

NEW QUESTION 27
A developer wants to set up a secure web server with Node.js. The developer creates a
directory locally called app-server, and the first file is app-server/index.js
Without using any third-party libraries, what should the developer add to index.js to create the
secure web server?

const https =require(‘https’);

const server =require(‘secure-server’);

const tls = require(‘tls’);

const http =require(‘http’);

NEW QUESTION 28
Universal Containers (UC) notices that its application that allows users to search for accounts makes a network request each time a key is pressed. This results in too many requests for the server to handle.
* Address this problem, UC decides to implement a debounce function on string change handler.
What are three key steps to implement this debounce function?
Choose 3 answers:

If there is an existing setTimeout and the search string change, allow the existing setTimeout to finish, and do not enqueue a new setTimeout.

When the search string changes, enqueue the request within a setTimeout.

Ensure that the network request has the property debounce set to true.

If there is an existing setTimeout and the search string changes, cancel the existing setTimeout using the persisted timerId and replace it with a new setTimeout.

Store the timeId of the setTimeout last enqueued by the search string change handle.

NEW QUESTION 29
Which three statements are true about promises?
The executor of a new promise runs automatically.

A promise has a . then 90 method.

A fulfilled or rejected promise will not change states.

A settled promises can become resolved.

A pending promise can become fulfilled, settled or rejected.

NEW QUESTION 30
A test has a dependency on database.query. During the test the dependency is replaced with an object called database with the method, query, that returns an array. The developer needs to verify how many times the method was called and the arguments used each time.
Which two test approaches describe the requirement?
Choose 2 answers

Integration

Black box

White box

Mocking

NEW QUESTION 31
Which code statement below correctly persists an object in localStorage?

const setLocalstorage = (storageKey , jsobject) => (
windows. LocalStorage,setitem(storagekey. jSON,string
)

const setLocalstorage = (jsobject) =>
Windows.localstorage.connectobject(jsObject);

Const setLocalstorage = (jsobject ) => (
Window .localstorage .setitem (jsobject) ;

Const setlocalstorage = (storagekey, jsObject) => (
Window. Localstorage.persist (storagekey, jsObject);
)

NEW QUESTION 32
Universal Containers recently launched its new landing page to host a crowd-funding campaign. The page uses an external library to display some third-party ads. Once the page is fully loaded, it creates more than 50 new HTML items placed randomly inside the DOM, like the one in the code below:

All the elements includes the same ad-library-item class, They are hidden by default, and they are randomly displayed while the user navigates through the page.

Use the DOM inspector to prevent the load event to be fired.

Use the browser to execute a script that removes all the element containing the class ad-library-item.

Use the DOM inspector to remove all the elements containing the class ad-library-item.

Use the browser console to execute a script that prevents the load event to be fired.

NEW QUESTION 33
A developer wants to define a function log to be used a few times on a single-file JavaScript script.
01 // Line 1 replacement
02 console.log(‘”LOG:’, logInput);
03 }
Which two options can correctly replace line 01 and declare the function for use?
Choose 2 answers

function leg(logInput) {

const log(loginInput) {

const log = (logInput) => {

function log = (logInput) {

NEW QUESTION 34
Which three actions can be using the JavaScript browser console?
Choose 3 answers:

View and change DOM the page.

Display a report showing the performance of a page.

Run code that is not related to page.

view , change, and debug the JavaScript code of the page.

View and change security cookies.

NEW QUESTION 35
A developer is wondering whether to use, promise, then or provise, catch especially when a promise throws an error.
Which two promises are rejected? Choose 2 answers

Promise, rejected (Cool error here’), then (error => console (error ));

New promise (() => (throw ‘Cool error here ‘)) , then ((null, error => console, (error)));

New Promise((resolve, reject) => ( throw ‘Cool error here’)) .catch (error => console (error ));

Promise , reject (‘Cool error here ‘) , catch (error => console ,error (error));

NEW QUESTION 36
Given the code below:
const copy = JSON.stringify([ new String(‘ false ‘), new Bollean( false ), undefined ]);
What is the value of copy?

— [ “false” , { } ]–

— [ false, { } ]–

— [ “false” , false, undefined ]–

— [ “false” ,false, null ]–

NEW QUESTION 37
Refer to code below:
Const objBook = {
Title: ‘Javascript’,
};
Object.preventExtensions(objBook);
Const newObjBook = objBook;
newObjectBook.author = ‘Robert’;
What are the values of objBook and newObjBook respectively ?

[title: “javaScript”] [title: “javaScript”]

{author: “Robert”, title: “javaScript}
Undefined

{author: “Robert”, title: “javaScript}
{author: “Robert”, title: “javaScript}

{author: “Robert”}
{author: “Robert”, title: “javaScript}

NEW QUESTION 38
Given two expressions var1 and var2, what are two valid ways to return the logical AND of the two expression and ensure it is data type Boolean? Choose 2 answers

Boolean (var1 && var2)

Var1 && var2

Var1. Toboolean ( ) && var2, to Boolean ( )

Boolean (var1) && Boolean (var2)

NEW QUESTION 39
A developer is required to write a function that calculates the sum of elements in an array but is getting undefined every time the code is executed. The developer needs to find what is missing in the code below.
Const sumFunction = arr => {
Return arr.reduce((result, current) => {
//
Result += current;
//
), 10);
);
Which option makes the code work as expected?

Replace line 02 with return arr.map(( result, current) => (

Replace line 04 with result = result +current;

Replace line 03 with if(arr.length == 0 ) ( return 0; )

Replace line 05 with return result;

NEW QUESTION 40
A developer wrote a fizzbuzz function that when passed in a number, returns the following:
* ‘Fizz’ if the number is divisible by 3.
* ‘Buzz’ if the number is divisible by 5.
* ‘Fizzbuzz’ if the number is divisible by both 3 and 5.
* Empty string if the number is divisible by neither 3 or 5.
Which two test cases will properly test scenarios for the fizzbuzz function?
Choose 2 answers

let res = fizzbuzz(5);
console.assert ( res === ‘ ‘ );

let res = fizzbuzz(15);
console.assert ( res === ‘ fizzbuzz ‘ )

let res = fizzbuzz(Infinity);
console.assert ( res === ‘ ‘ )

let res = fizzbuzz(3);
console.assert ( res === ‘ buzz ‘ )

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