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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: Jan 14, 2026
  • Rated: 4.9 |
  • Online Users: 434
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  • Question 1
    • Refer to the following code:
      class Vehicle{
      constructor(plate){
      this.plate = plate;
      }
      }
      class Truck extends Vehicle{
      constructor(plate, weight){
      //Missing code
      this.weight = weight;
      }
      displayWeight(){
      console.log(`The truck ${this.plate} has a weight of ${this.weight}lb.`);
      }
      }let myTruck = new Truck('123Ab',5000);
      myTruck.displayWeight();
      Which statement should be added to missing code for the code to display 'The truck 123AB has a
      weight of 5000lb.

      Answer: A
  • Question 2
    • Considering type coercion, what does the following expression evaluate to?
      True + '13' + NaN

      Answer: D
  • Question 3
    • A developer is creating a simple webpage with a button. When a user clicks this button
      for the first time, a message is displayed.
      The developer wrote the JavaScript code below, but something is missing. The
      message gets displayed every time a user clicks the button, instead of just the first time.
      01 function listen(event) {
      02 alert ( 'Hey! I am John Doe') ;
      03 button.addEventListener ('click', listen);
      Which two code lines make this code work as required?
      Choose 2 answers

      Answer: C,D
  • Question 4
    • Refer to the code below:

      8

      Which value can a developer expect when referencing country,capital,cityString?

      Answer: D
  • Question 5
    • Refer to HTML below:
      This card is smaller.
      The width and height of this card is determined by its
      contents.
      Which expression outputs the screen width of the element with the ID card-01?

      Answer: A
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