Salesforce Javascript-Developer-I Question Answers

Question # 21

Which function should a developer use to repeatedly execute code at a fixed interval ?
 
 

A. setIntervel
B. setTimeout
C. setPeriod
D. setInteria

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Question # 22

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? Choose 3 answers: 
 

A. I nstalls with its own package manager toinstall and manage third-party libraries.
B. Ensures stability with one major release every few years.
C. Performs a static analysis on code before execution to look for runtime errors.
D. Executes server-side JavaScript code to avoid learning a new language.
E. User non blocking functionality for performant request handling .

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Question # 23

A developer receives a comment from the Tech Lead that the code given below has error: const monthName = ‘July’; const year = 2019; if(year === 2019) { monthName = ‘June’; } Which line edit should be made to make this code run? 
 

A. 01 let monthName =’July’;
B. 02 let year =2019;
C. 02 const year = 2020;
D. 03 if (year == 2019) {

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Question # 24

A developer wrote the following code: 01 let X = object.value; 02 03 try { 04 handleObjectValue(X); 05 } catch (error) { 06 handleError(error); 07 } The developer has a getNextValue function to execute after handleObjectValue(), but does not want to execute getNextValue() if an error occurs. How can the developer change the code to ensure thisbehavior? 
 

A. 03 try{ 04 handleObjectValue(x); 05 } catch(error){ 06 handleError(error); 07 } then { 08 getNextValue(); 09 }
B. 03 try{ 04 handleObjectValue(x); 05 } catch(error){ 06 handleError(error); 07 } finally { 08 getNextValue(); 10 }
C. 03 try{ 04handleObjectValue(x); 05 } catch(error){ 06 handleError(error); 07 } 08 getNextValue();
D. 03 try { 04 handleObjectValue(x) 05 ……………………

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Question # 25

 After executing, what is the value offormattedDate? 
 

A. May 10, 2020
B. June 10, 2020
C. October 05, 2020
D. November 05, 2020

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Question # 26

Which three browser specific APIs are available for developers to persist data between page loads ? Choose 3 answers 
 

A. IIFEs
B. indexedDB
C. Global variables
D. Cookies
E. localStorage.

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Question # 27

In the browser, the window object is often used to assign variables that require the broadest scope in an application Node.js application does not have access to the window object by default. Which two methods are used to address this ? Choose 2 answers 
 

A. Use the document object instead of the window object.
B. Assign variables to the global object.
C. Create a new window object in the root file.
D. Assign variablesto module.exports and require them as needed.

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Question # 28

A developer at Universal Containers creates a new landing page based on HTML, CSS, and JavaScript TO ensure that visitors have a good experience, a script named personaliseContext needs to be executed when the webpage is fully loaded (HTML content and all related files ), in order to do some custom initialization. Which statement should beused to call personalizeWebsiteContent based on the above business requirement? 
 

A. document.addEventListener(‘’onDOMContextLoaded’, personalizeWebsiteContext);
B. window.addEventListener(‘load’,personalizeWebsiteContext);
C. window.addEventListener(‘onload’, personalizeWebsiteContext);
D. Document.addEventListener(‘‘’DOMContextLoaded’ , personalizeWebsiteContext);

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Question # 29

Given the code below: 01 function GameConsole (name) { 02 this.name = name; 03 } 04 05 GameConsole.prototype.load = function(gamename) { 06 console.log( ` $(this.name) is loading agame : $(gamename) …`); 07 ) 08 function Console 16 Bit (name) { 09 GameConsole.call(this, name) ; 10 } 11 Console16bit.prototype = Object.create ( GameConsole.prototype) ; 12 //insert code here 13 console.log( ` $(this.name) is loading a cartridge game :$(gamename) …`); 14 } 15 const console16bit = new Console16bit(‘ SNEGeneziz ’); 16 console16bit.load(‘ Super Nonic 3x Force ’); What should a developer insert at line 15 to output the following message using the method ? > SNEGeneziz is loading a cartridgegame: Super Monic 3x Force . . . 
 

A. Console16bit.prototype.load(gamename) = function() {
B. Console16bit.prototype.load = function(gamename) {
C. Console16bit = Object.create(GameConsole.prototype).load = function (gamename) {
D. Console16bit.prototype.load(gamename) {

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Question # 30

A team that works on a big project uses npm to deal with projects dependencies. A developer added a dependency does not get downloaded when they executenpm install. Which two reasons could be possible explanations for this? Choose 2 answers 
 

A. The developer missed the option --add when adding the dependency.
B. The developer added the dependency as a dev dependency, and NODE_ENV Is set to production.
C. The developer missed the option --save when adding the dependency.
D. The developer added the dependency as a dev dependency, and NODE_ENV is set to production.

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