Salesforce Salesforce Certifications JAVASCRIPT-DEVELOPER-I Questions & Answers

• Question 31:

  Which option is a core Node,js module?

  A. Path

  B. Ios

  C. Memory

  D. locate

  Correct Answer: A

• Question 32:

  Refer to the code below:

  for(let number =2 ; number <= 5 ; number += 1 ) {

  // insert code statement here

  }

  Thedeveloper needs to insert a code statement in the location shown. The code statement has these requirements:

  1.

  Does require an import

  2.

  Logs an error when the boolean statement evaluates to false

  3.

  Works in both the browser and Node.js Which meet the requirements?

  A. assert (number % 2 === 0);

  B. console.error(number % 2 === 0);

  C. console.debug(number % 2 === 0);

  D. console.assert(number % 2 === 0);

  Correct Answer: B

• Question 33:

  A developer has a web serverrunning with Node.js. The command to start the web server is node server.js. The web server started having latency issues. Instead of a one second turnaround for web requests, the developer now sees a five second turnaround.

  Which command can the web developer run to see what the module is doing during the latency period?

  A. NODE_DEBUG=true node server.js

  B. DEBUG=http, https node server.js

  C. NODE_DEBUG=http,https node server.js

  D. DEBUG=true node server.js

  Correct Answer: D

• Question 34:

  Cloud Kicks has a class to represent items for sale in an online store, as shown below:

  Class Item{

  constructor (name, price){

  this.name = name;

  this.price = price;

  }

  formattedPrice(){

  return `s' + String(this.price);}}

  A new business requirement comes in that requests a ClothingItem class that should have all of the properties and methods of the Item class but will also have properties that are specific to clothes.

  Which line of code properly declares the clothingItem class such that it inherits from Item?

  A. Class ClothingItem implements Item{

  B. Class ClothingItem {

  C. Class ClothingItem super Item {

  D. Class ClothingItem extends Item {

  Correct Answer: D

• Question 35:

  Refer to the following code:

  01 function Tiger(){

  02 this.Type = `Cat';

  03 this.size = `large';

  04 }

  06 let tony = new Tiger();

  07 tony.roar = () =>{

  08 console.log(`They\'re great1');

  09 };

  11 function Lion(){

  12 this.type = `Cat';

  13 this.size = `large';

  14 }

  16 let leo = new Lion();

  17//Insert code here

  18 leo.roar();

  Which two statements could be inserted at line 17 to enable the function call on line 18?

  Choose 2 answers.

  A. Leo.roar = () => { console.log(`They\'re pretty good:'); };

  B. Object.assign(leo,Tiger);

  C. Object.assign(leo,tony);

  D. Leo.prototype.roar = () => { console.log(`They\'re pretty good:'); };

  Correct Answer: AC

• Question 36:

  A developer wants to set up a secure web serverwith Node.js. The developer creates 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 https =require(`https');

  B. const server =require(`secure-server');

  C. const tls = require(`tls');

  D. const http =require(`http');

  Correct Answer: A

• Question 37:

  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. Option A

  B. Option B

  C. Option C

  Correct Answer: B

• Question 38:

  A developer implements and calls the following code when an application state change occurs:

  Const onStateChange =innerPageState) => {

  window.history.pushState(newPageState,` ', null);

  }

  If the back button is clicked after this method is executed, what can a developer expect?

  A. A navigate event is fired with a state property that details the previous application state.

  B. The page is navigated away from and the previous page in the browser's history is loaded.

  C. The page reloads and all Javascript is reinitialized.

  D. A popstate event is fired with a state property that details the application's last state.

  Correct Answer: B

• Question 39:

  Refer to the following code:

  

  Which two statement could be inserted at line 17 to enable the function call on line 18? Choose 2 answers

  A. Object.assign (leo, tony);

  B. Object.assign (leo. Tiger);

  C. leo.roar = () => { console.log('They\'re pretty good!'););

  D. leo.prototype.roar = ( ) =>( console.log('They\'re pretty good!'); };

  Correct Answer: AC

• Question 40:

  A developer wrote a fizzbuzzfunction that when passed in a number, returns the following:

  `Fizz' if the number is divisible by 3.

  `Buzz' if the number is divisible by 5.

  `Fizzbuzz' if the number is divisible by both 3 and 5.

  Empty string if the number is divisible by neither3 or 5.

  Which two test cases will properly test scenarios for the fizzbuzz function?

  Choose 2 answers

  A. let res = fizzbuzz(5); console.assert ( res === ` ' );

  B. let res = fizzbuzz(15); console.assert ( res === ` fizzbuzz ' )

  C. let res = fizzbuzz(Infinity); console.assert ( res === ` ' )

  D. let res = fizzbuzz(3); console.assert ( res === ` buzz ' )

  Correct Answer: BCD