Salesforce Salesforce Developer JAVASCRIPT-DEVELOPER-I Questions & Answers

• Question 1:

  After user acceptance testing, the developer is asked to change the webpage background based on user's location. This change was implemented and deployed for testing.

  The tester reports that the background is not changing, however it works as required when viewing on the developer's computer.

  Which two actions will help determine accurate results?

  Choose 2 answers

  A. The developer should inspect their browser refresh settings.

  B. The tester should disable their browser cache.

  C. The developer should rework the code.

  D. The tester should dear their browser cache.

  Correct Answer: AD

• Question 2:

  Given the following code:

  

  What is the output of line 02?

  A. "null"

  B. "x-

  C. "undefined" 0

  D. 'object"

  Correct Answer: D

• Question 3:

  A developer wants to use a module called DataPrettyPrint. This module exports one default function called printDate (). How can a developer import and use the printDate() function?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: B

• Question 4:

  Which code statement below correctly persists an objects in local Storage ?

  A. const setLocalStorage = (storageKey, jsObject) => { window.localStorage.setItem(storageKey, JSON.stringify(jsObject)); }

  B. const setLocalStorage = ( jsObject) => {window.localStorage.connectObject(jsObject));}

  C. const setLocalStorage = ( jsObject) => {window.localStorage.setItem(jsObject);}

  D. const setLocalStorage = (storageKey, jsObject) => { window.localStorage.persist(storageKey, jsObject); }

  Correct Answer: A

• Question 5:

  Given the JavaScript below:

  

  Which code should replace the placeholder comment on line 06 to hide accounts that do not match the search string?

  A. `None' : `block'

  B. `Visible : 'hidden'

  C. `Hidden, visible

  D. `Block' : `none'

  Correct Answer: D

• Question 6:

  A developer tries to retrieve all cookies, then sets a certain key value pair in the cookie. These statements are used:

  

  What is the behavior?

  A. Cookies are read, but the key value is not set because the value is not URL encoded.

  B. Cookies are not read because line 01 should be document, cookies, but the key value is set and all cookies are wiped.

  C. A Cookies are read and the key value is set, the remaining cookies are unaffected.

  D. Cookies are read and the key value is set, and all cookies are wiped.

  Correct Answer: C

• Question 7:

  Refer to the code below:

  

  What is the result when the Promise in the execute function is rejected?

  A. Resolved1 Resolved2 Resolved3 Resolved4

  B. Rejected

  C. Rejected Resolved

  D. Rejected1 Rejected2 Rejected3 Rejected Rejected Rejected4

  Correct Answer: C

• Question 8:

  A developer initiates a server with the file server,js and adds dependencies in the source codes package,json that are required to run the server. Which command should the developer run to start the server locally?

  A. start server,js

  B. npm start server,js

  C. npm start

  D. node start

  Correct Answer: C

• Question 9:

  CORRECT TEXT

  Refer the code below.

  x=3.14;

  function myfunction() {

  "use strict";

  y=x;

  }

  z=x;

  myFunction();

  A. Z is equal to 3.14

  B. Use strict has effect only on line 5.

  C. Line 5 throws an error

  D. PlaceHolder

  Correct Answer: A

• Question 10:

  A developer at Universal Containers is creating their new landing page based on HTML, CSS, and JavaScript.

  To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage is fully loaded (HTML content and all related files), in order to do some custom initializations.

  Which implementation should be used to call Fe:s:-a;::eHec5;te::.-.ter.: based on the business requirement above?

  A. Add a listener to the window object to handle the DOMContentLoaded event

  B. Add a handler to the personalizeWebsiteContent script to handle the load event

  C. Add a listener to the window object to handle the lead event

  D. Add a handler to the personalizeWebsiteContent script to handle the DOMContentLoaded event

  Correct Answer: C