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Free Salesforce Javascript-Developer-I Exam Questions

Absolute Free Javascript-Developer-I Exam Practice for Comprehensive Preparation 

  • Salesforce Javascript-Developer-I Exam Questions
  • Provided By: Salesforce
  • Exam: Salesforce Certified JavaScript Developer - Multiple Choice (JS-Dev-101)
  • Certification: Javascript Developer
  • Total Questions: 217
  • Updated On: Jan 14, 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
    • 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 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 two expressions var1 and var2. What are two valid ways to return the logical AND
      of the two expressions and ensure it is data type Boolean ?
      Choose 2 answers:

      Answer: A,D
  • Question 5
    • Given the code below:
      const copy = JSON.stringify([ new String(' false '), new Bollean( false ), undefined ]);
      What is the value of copy?

      Answer: D
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