JavaScript Developer I exam

A developer has the following array of student test grades: Let arr = [ 7, 8, 5, 8, 9]; The Teacher wants to double each score and then see an array of the students who scored more than 15 points. How should thedeveloper implement the request?A . Let arr1 =...

Refer to the following 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 answersA . // FooUtils.js and BarUtils.js exist Import (foo) from ‘/path/FooUtils.js’;...

Which code statement correctly retrieves and returns an object from localStorage?A . const retrieveFromLocalStorage = () =>{return JSON.stringify(window.localStorage.getItem(storageKey));}B . const retrieveFromLocalStorage = (storageKey) =>{return window.localStorage.getItem(storageKey);}C . const retrieveFromLocalStorage = (storageKey) =>{return JSON.parse(window.localStorage.getItem(storageKey));}D . constretrieveFromLocalStorage = (storageKey) =>{return window.localStorage[storageKey];}View AnswerAnswer: C

Refer to the code below: 01 const exec = (item, delay) =>{ 02 newPromise(resolve => setTimeout( () => resolve(item), delay)), 03 async function runParallel() { 04 Const (result1, result2, result3) = await Promise.all{ 05 [exec (‘x’, ‘100’), exec(‘y’, 500), exec(‘z’, ‘100’)] 06 ); 7 return `parallel is done: $(result1)$(result2)$(result3)`; 8...

Refer to the following code: Let obj ={ Foo: 1, Bar: 2 } Let output =[], for(let something in obj{ output.push(something); } console.log(output); What is the output line 11?A . [1,2]B . [“bar”,”foo”]C . [“foo”,”bar”]D . [“foo:1”,”bar:2”]View AnswerAnswer: C

A developer has two ways to write a function: Option A: function Monster() { This.growl = () => { Console.log (“Grr!”); } } Option B: function Monster() {}; Monster.prototype.growl =() => { console.log(“Grr!”); } After deciding on an option, the developer creates 1000 monster objects. How many growl methods are...

CORRECT TEXT Refer to the string below. Const str=’Salesforce’; Which two statements results in the word 'Sales'?View AnswerAnswer: Str.substring(0,5); Str.substr(0,5);

Given the following code: What will be the first four numbers logged?A . 0012 B. 0112 C. 0122 D. 0123View AnswerAnswer: B

A developer wants to create an object from a function in the browser using the code below: Function Monster() { this.name = ‘hello’ }; Const z = Monster(); What happens due to lack of the new keyword on line 02?A . The z variable is assigned the correct object. B....

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