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Free Salesforce DEX602 Exam Questions

Absolute Free DEX602 Exam Practice for Comprehensive Preparation 

  • Salesforce DEX602 Exam Questions
  • Provided By: Salesforce
  • Exam: Program Lightning Web Components
  • Certification: Javascript Developer
  • Total Questions: 217
  • Updated On: Mar 06, 2026
  • Rated: 4.9 |
  • Online Users: 434
Page No. 1 of 44
   
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  • Question 1
    • A developer has two ways to write a function:
      Option A:
      function Monster(){
      this.growl = ()=>{
      console.log('Grr!');
      }
      }
      Option B:
      function Monster(){};
      Monster.prototype.growl = ()=>{
      console.log('Grr!');
      }
      After deciding on an option, the developer creates 1000 monster objects.
      How many growl methods are created with Option A and Option B?

      Answer: B
  • Question 2
    • Which function should a developer use to repeatedly execute code at a fixed interval ?

      Answer: A
  • Question 3
    • A developer creates a class that represents a blog post based on the requirement that a
      Post should have a body author and view count.
      The Code shown Below:
      Class Post {
      // Insert code here
      This.body =body
      This.author = author;
      this.viewCount = viewCount;
      }
      }
      Which statement should be inserted in the placeholder on line 02 to allow for a variable to be set
      to a new instanceof a Post with the three attributes correctly populated?

      Answer: C
  • Question 4
    • 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 a game : $(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 cartridge game: Super Monic 3x Force . . .

      Answer: B
  • Question 5
    • Refer to the code below:
      Const myFunction = arr => {
      Return arr.reduce((result, current) =>{
      Return result = current;
      }, 10};
      }
      What is the output of this function when called with an empty array ?

      Answer: C
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