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Free Salesforce Javascript-Developer-I Exam Questions

Try our Free Demo Practice Tests for Comprehensive Javascript-Developer-I Exam Preparation

  • Salesforce Javascript-Developer-I Exam Questions
  • Provided By: Salesforce
  • Exam: Salesforce Certified JavaScript Developer I (WI25)
  • Certification: Javascript Developer
  • Total Questions: 217
  • Updated On: Mar 28, 2025
  • Rated: 4.9 |
  • Online Users: 434
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  • Question 1
    • Considering type coercion, what does the following expression evaluate to?
      True + '13' + NaN

      Answer: D
  • Question 2
    • Refer to the expression below:
      Let x = ('1' + 2) == (6 * 2);
      How should this expression be modified to ensure that evaluates to false?

      Answer: B
  • Question 3
    • Given the JavaScript below:
      9
      Which code should replace the placeholder comment on line 05 to highlight accounts that match the search string'


      Answer: D
  • Question 4
    • 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 5
    • Which javascript methods can be used to serialize an object into a string and deserialize
      a JSON string into an object, respectively?

      Answer: A
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