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Free Salesforce JS-Dev-101 Exam Questions

Absolute Free JS-Dev-101 Exam Practice for Comprehensive Preparation 

  • Salesforce JS-Dev-101 Exam Questions
  • Provided By: Salesforce
  • Exam: Salesforce Certified JavaScript Developer - Multiple Choice
  • Certification: Salesforce Certified Developer
  • Total Questions: 217
  • Updated On: Sep 03, 2026
  • Rated: 4.9 |
  • Online Users: 434
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  • Question 1
    • A developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three numbers in the array, and the test passes.
      A different developer made changes to the behavior of sum3 to instead sum only the first two numbers present in the array.

      Capture

      Which two results occur when running this test on the updated sum3 function?
      Choose 2 answers

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

      Answer: D
  • Question 3
    • Given the code below:
      const delay = sync delay => {
      Return new Promise((resolve, reject) => {
      setTimeout (resolve, delay);});};
      const callDelay =async () =>{
      const yup =await delay(1000);
      console.log(1);
      What is logged to the console?

      Answer: D
  • Question 4
    • A developer is working on an ecommerce website where the delivery date is dynamically
      calculated based on the current day. The code line below is responsible for this calculation.
      Const deliveryDate = new Date ();
      Due to changes in the business requirements, the delivery date must now be today's
      date + 9 days.
      Which code meets this new requirement?

      Answer: A
  • Question 5
    • 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
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