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| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I - Multiple Choice Exam (JS-Dev-101) |
| Exam Number: | JS-Dev-101 |
| Exam Price: | $200 USD |
| Real Exam Qty: | 60 (multiple choice) |
| Related Certifications: | Salesforce Platform Developer I Salesforce Platform Developer II |
| Certificate Validity Period: | 1 year (maintenance required annually in Salesforce certification program) |
| Available Languages: | English |
| Passing Score: | 65% |
| Exam Format: | Multiple Choice Questions, Multiple Select Questions |
| Exam Duration: | 105 minutes |
| Recommended Training: | MDN Web Docs - JavaScript Guide Salesforce Trailhead - JavaScript Developer I |
| Exam Registration: | Kryterion Webassessor (Exam Delivery) Salesforce Certification Registration |
| Sample Questions: | Salesforce JS-Dev-101 Sample Questions |
| Exam Way: | Online proctored exam via Salesforce authorized testing platform (e.g., Webassessor) |
| Pre Condition: | No formal prerequisites, but familiarity with JavaScript and web development is recommended. |
| Official Syllabus URL: | https://trailhead.salesforce.com/credentials/javascriptdeveloper |
>> Latest JS-Dev-101 Exam Questions Vce <<
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NEW QUESTION # 15
Which statement parses successfully?
Answer: C
NEW QUESTION # 16
A developer wrote a fizzbuzz function thatwhen passed in a number, returns the following:
* 'Fizz' if the number is divisible by 3.
* 'Buzz' if the number is divisible by 5.
* 'Fizzbuzz' if the number is divisible by both 3 and 5.
* Empty string if the number is divisible by neither 3 or 5.
Whichtwo test cases will properly test scenarios for the fizzbuzz function?
Choose 2 answers
Answer: B,C,D
NEW QUESTION # 17
Given the HTML below:
Which statement adds the priority-account css class to the Applied Shipping row?
Answer:
Explanation:
document.querySelector('#row-as').classList.add('priority-account');
NEW QUESTION # 18
In the browser, the window object is often used to assign variables that require the broadest scope in an application Node.js application does not have access to the window object by default.
Which two methods areused to address this ?
Choose 2 answers
Answer: C
NEW QUESTION # 19
Refer to the code below:
01 const objBook = {
02 title: 'JavaScript',
03 };
04 Object.preventExtensions(objBook);
05 const newObjBook = objBook;
06 newObjBook.author = 'Robert';
What are the values of objBook and newObjBook respectively?
Answer: A
Explanation:
________________________________________
Comprehensive and Detailed Explanation From Exact Extract JavaScript Knowledge Object.preventExtensions(obj) This built-in JavaScript method marks an object so that no new properties can be added to it.
Existing properties can still be read and updated, but adding new ones is disallowed.
const newObjBook = objBook;
Both variables reference the same object in memory. JavaScript objects are assigned by reference, not copied.
newObjBook.author = "Robert";
Because the object has been marked as non-extensible, JavaScript will not allow new properties to be added.
The behavior depends on mode:
In non-strict mode: the assignment silently fails and does nothing.
In strict mode: this would throw a TypeError.
Since nothing indicates strict mode, this is non-strict behavior, making the assignment fail silently.
Therefore, the object remains:
{ title: "JavaScript" }
Both objBook and newObjBook point to the same unchanged object.
This matches option A.
________________________________________
JavaScript knowledge references (text-only)
Object.preventExtensions() prevents adding new properties.
Assigning an object to another variable copies the reference, not the object.
Adding a property to a non-extensible object silently fails in non-strict mode.
NEW QUESTION # 20
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