[Jan-2022] JavaScript-Developer-I Certification with Actual Questions from VCEEngine
Updated JavaScript-Developer-I Dumps PDF - JavaScript-Developer-I Real Valid Brain Dumps With 160 Questions!
Salesforce JavaScript Developer I Certification Path
You must get an idea of exactly what this certification is, before investing your valuable time, effort, or money in Salesforce. The demand and the need for Salesforce certified professionals are rapidly growing and so Salesforce JavaScript Developer I Certification is becoming more and more popular. Different types of online training sessions are provided such as Intellipaat 's online training sessions for the Salesforce JavaScript Developer I Qualification . It is instructor-led teaching by subject professionals working in major organizations. This style of training includes live sessions with the teacher, along with a forum where you can clear all your course-based doubts.
Self-paced sessions are also offered. This training mode involves pre-recorded video sessions. You can conveniently return to these talks and revisit the subjects you have skipped whether you have any difficulties with the lectures or have difficulty keeping up with the online meetings. You will also use these sessions to finish your exercise at your speed while you access these online lessons throughout your life.
Topics of Salesforce JavaScript Developer I Exam
Aspirants must know the exam topics before they start of preparation. Because it will help them to prepare for the below concepts Salesforce JavaScript-Developer-I exam will include the following topics:
1. Variable, Types, and Collection: 23%
Scenario based coding Variables Creation and Initialization JSON object understanding
2. Object, Functions, and Classes: 25%
Implementation of different functions Understanding of different modules of Javascript Scope of variables and their execution flow
3. Browser and Events: 17%
Handling and propagation of events Development tools of browsers Understanding of browser specific APIs
4. Asynchronous Programming: 13%
Asynchrounous programming different concepts Monitoring and management of different loops
5. Server Side Javascript: 8%
Implementation of Node.js Understanding of Node.js CLI commands
6. Testing: 7%
Unit Testing effectiveness of different tests
NEW QUESTION 14
A 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 three benefits of Node.js can the developer use to persuade their manager?
Which three benefits of Node.js can the developer use to persuade their manager?
- A. Installs with its own package manager to install and manage third-party libraries.
- B. Performs a static analysis can code before execution to look for runtime errors.
- C. Uses non-blocking functionality for performant request handling
- D. Executes server-side JavaScript code to avoid learning a new language.
- E. Ensure stability with one major release every few years.
Answer: B
NEW QUESTION 15
Refer to the code below:
Which two statements correctly execute the runparallel () function?
Choose 2 answers
- A. runParallel () , then (function ) (date) { } 0;
- B. Async runParalled (). Then (data) :
- C. runParralel () . then (data );
- D. runParallel () , done (function ( data)(return data; }};
Answer: A,B
NEW QUESTION 16
Universal Containers recently its new landing page to host crowd-function 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 included the same ad-library-item class. They are hidden by default, and they are randomly displayed while the user navigation through the page.
Tired of all the ads, what can the developer do to temporarily and quickly remove them?
- A. Use the browser console to execute a script that removes all the elements containing the class ad-library-item.
- B. Use the DOM inspector to prevent the load event to be fired.
- C. Use the DOM inspector to remove all the elements containing the call ad-library -item.
- D. Use the browser console to execute a script that prevents the load event to be fired.
Answer: A
NEW QUESTION 17
A developer wants to set up a secure web server with Node.js. The developer create 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?
- A. Const tls = require ('tls') ;
- B. Const http = require ('http');
- C. Const http = require ('https') ;
- D. Const server = require ( 'secure-server') ;
Answer: C
NEW QUESTION 18
Refer to the code below:
After running this code, which result is displayed on the console?
- A. > 5
> 0 - B. > True
> False - C. > 5
> Undefined - D. > 5
>- 1
Answer: D
NEW QUESTION 19
Refer to the code below:
What is the output after the ode executes successfully?
- A. Start
Success
End - B. End
Start
Success - C. Success
Start
End - D. Start
End
Success
Answer: A
NEW QUESTION 20
Refer to the following array:
Let arr1 = [ 1, 2, 3, 4, 5 ];
Which two lines of code result in a second array, arr2 being created such that arr2 is not a reference to arr1?
- A. Let arr2 = Array.from(arr1);
- B. Let arr2 = arr1.slice(0, 5);
- C. Let arr2 = arr1;
- D. Let arr2 = arr1.sort();
Answer: A,B
NEW QUESTION 21
Why would a developer specify a package as the package.json as a deDepdelivery instead of a depdelivery?
- A. It should be bundled when the package is published.
- B. It is only needed for local development and testing.
- C. It is required by the application in production.
- D. Other required packages depended on it for development.
Answer: B
NEW QUESTION 22
Given the code block below:
What should a developer insert line 15 to output the following message using the load method?
SNENneziz is loading a cartridge game: super Monic 3x Force...
- A. Console16bit. Prototype. Load (gamename) (
- B. Console116bit. Prototype. Load (gamename) = function () (
- C. Console16bit. Prototype. Load = function (gamename) (
- D. Console16bit = object. Create (GameConsole. Prototype). Load _ function (gamename) (
Answer: C
NEW QUESTION 23
Which statement parses successfully?
- A. JSON. parse (""foo"');
- B. JSON.parse ("foo");
- C. JSON.parse (""foo'");
- D. JSON.parse ("foo");
Answer: A
NEW QUESTION 24
A developer needs to test this functions:
Which two assert statements are valid tests for this function?
- A. Console.assert(sum3 (['hello' 2, 3, 4]) NaN);
- B. Console.assert(sum3 ([-3, 2]) -1) ;
- C. Console.assert(sum3((1, '2' ]) 12 );
- D. Console.assert(sum3([0]) 0) ;
Answer: B,C
NEW QUESTION 25
Refer to the following code block:
What is the value of output after the code executes?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 26
Which statement accurately describes an aspect of promises?
- A. Agruments for the callback function passed to .then ( ) are optional.
- B. .then ( ) manipulates and returns the original promise.
- C. In a , them ( ) function, returning results is not necessary since callback will catch the result of a previous promise.
- D. .Them ( ) cannot be added after a catch.
Answer: A
NEW QUESTION 27
Refer to the code below:
Considering the implementations of 'use strict' on line 04, which three statements describes the executes of the code? Choose 3 answers
- A. 'use strict' has an effect between line 04 and the end of the file.
- B. Line 05 throws an error.
- C. 'use strict' has an effect only on line 05.
- D. Z is equal to 3,14.
- E. 'use strict , is hoisted, so it has an effect on all lines.
Answer: B,D,E
NEW QUESTION 28
Refer to the code below:
Why does the function bar have access to variable =?
- A. Inner function's scope
- B. Prototype chain
- C. Outer function's scope
- D. Hoisting
Answer: A
NEW QUESTION 29
Given the code below:
Const copy = JSON.stringify((new String ('false') , new Bolean(false) undefined)); What is the value of copy?
- A. -- [\''false\'', false, null]" "
- B. -- [\''false\", ()""
- C. --[ false, ()]-
- D. -- [ \'false\'', false, undefined]'' ''
Answer: A
NEW QUESTION 30
Given a value, which three options can a developer use to detect of the value is NaN?
Choose 3 answers
- A. Value == Number, NaN
- B. Value == NaN
- C. Number , isNaN(value)
- D. Value I== value
- E. Object , is ( value, NaN)
Answer: B,C,E
NEW QUESTION 31
A developer wants to leverage a module to print a price in pretty format, and has imported a method as shown below:
Import printPrice from '/path/PrincePrettyPrint. Js';
Based on the code, what must be true about the printPrice function of the PricePrettyPrint modules for this import to work?
- A. printPrice must be named export
- B. printPrice must be a multi export
- C. printPrice must be an default export
- D. printPrice must be an all export
Answer: A
NEW QUESTION 32
Refer to the code below:
Line 05 causes an error.
What are the values of greeting and salutation once code completes?
- A. Greeting is Hello and salutation is Hello, Hello.
- B. Greeting is Goodbye and salutation is I say Hello.
- C. Greeting is Goodbye and salutation is Hello, Hello.
- D. Greeting is Hello and salutation is I say hello.
Answer: A
NEW QUESTION 33
Refer to the following code that imports a module named Utills,
Which two implementations of Utill, je export foo and bar such that the code above runs without error?
Choose 2 answers
- A. //FooUtill.js and barUtils, js exist
Import (foo) from ,/Path/footUtils.js,:
Export (foo, bar) - B. Export default class (
Foo ( ) ( return 'foo ,; )
Bar ( ) ( return ;bar ; ) - C. Const foo = () => ( return 'foo ' ; )
Const bar => ( return 'bar' ; )
Export (foo, bar) - D. Const foo = ( ) => ( return 'foo; ; )
Const bar => => { return 'bar ';}
Export default foo, bar;
Answer: B
NEW QUESTION 34
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.
- A. Use the DOM inspector to remove all the elements containing the class ad-library-item.
- B. Use the DOM inspector to prevent the load event to be fired.
- C. Use the browser console to execute a script that prevents the load event to be fired.
- D. Use the browser to execute a script that removes all the element containing the class ad-library-item.
Answer: D
NEW QUESTION 35
......
Who should take the Salesforce JavaScript-Developer-I Exam
This course is designed for Javascript developers starting on the Salesforce platform who require programming customizations on front-end and back-end. There are no prerequisites for Salesforce JavaScript Developer I Exam. Typical job roles that align to the Salesforce Certified JavaScript Developer I are as follows:
- Web application developer
- Technical Product Manager
- Salesforce developer
- Support engineer
- JavaScript programmer
- Software/backend developer
- Front end developer
- Technical Project Manager
- Full stack developer
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