JavaScript Developer I

Which javascript methods can be used to serialize an object into a string and deserialize a JSON string into an object, respectively?A . JSOB . stringify and JSOC . parseD . JSOE . serialize and JSOF . deserializeG . JSOH . encode and JSO . decode . JSO . parse...

A developer is wondering whether to use, Promise.then or Promise.catch, especially when a Promise throws an error? Which two promises are rejected? Which 2 are correct?A . Promise.reject(‘cool error here’).then(error => console.error(error));B . Promise.reject(‘cool error here’).catch(error => console.error(error));C . New Promise((resolve, reject) => (throw ‘cool error here’}).catch(error => console.error(error)) ;D...

Refer to the code below: Const searchTest = ‘Yay! Salesforce is amazing!” ; Let result1 = searchText.search(/sales/i); Let result 21 = searchText.search(/sales/i); console.log(result1); console.log(result2); After running this code, which result is displayed on the console?A . > true > falseB . > 5 >undefinedC . > 5 > -1D ....

Given the code below: 01 function GameConsole (name) { 02 this.name = name; 3 } 4 5 GameConsole.prototype.load = function(gamename) { 6 console.log( ` $(this.name) is loading a game : $(gamename) …`); 7 ) 8 function Console 16 Bit (name) { 9 GameConsole.call(this, name) ; 10 } 11 Console16bit.prototype =...

Given the code below: const copy = JSON.stringify([ new String(‘ false ’), new Bollean( false ), undefined ]); What is the value of copy?A . -- [ ”false” , { } ]--B . -- [ false, { } ]--C . -- [ ”false” , false, undefined ]--D . -- [...

The developer wants to test the array shown: const arr = Array(5).fill(0) Which two tests are the most accurate for this array? Choose 2 answers:A . console.assert( arr.length === 5 );B . arr.forEach(elem => console.assert(elem === 0)) ;C . console.assert(arr[0] === 0 && arr[ arr.length] === 0);D . console.assert (arr.length...

Why would a developer specify a package.jason as a developed forge instead of a dependency?A . It is required by the application in production.B . It is only needed for local development and testing.C . Other required packages depend on it for development.D . It should be bundled when the...

Refer to the code below: Function Person(firstName, lastName, eyecolor) { this.firstName =firstName; this.lastName = lastName; this.eyeColor = eyeColor; } Person.job = ‘Developer’; const myFather = new Person(‘John’, ‘Doe’); console.log(myFather.job); What is the output after the code executes?A . ReferenceError: eyeColor is not definedB . ReferenceError: assignment to undeclared variable “Person”C...

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 team has already built using HTML, CSS, and JavaScript. Which...

A developer creates a simple webpage with an input field. When a user enters text in the input field and clicks the button, the actual value of the field must be displayed in the console. Here is the HTML file content: <input type =” text” value=”Hello” name =”input”> <button type...