Exam JS-Dev-101 Pattern, Best JS-Dev-101 Preparation Materials

DOWNLOAD the newest SurePassExams JS-Dev-101 PDF dumps from Cloud Storage for free: https://drive.google.com/open?id=1VA9lVLOLxZlVT7mB3ZBZQz9fFUuVlWyW

Another challenge is staying on top of the ever-changing exam content. Salesforce JS-Dev-101 is constantly evolving, and it can be difficult to know what to expect on test day. Our Salesforce JS-Dev-101 practice tests and PDF are updated regularly to reflect the latest Salesforce JS-Dev-101 Exam Format and content, so you can be confident that you are studying the most up-to-date JS-Dev-101 exam information.

Salesforce JS-Dev-101 Exam Overview:

Certification Vendor:	Salesforce
Exam Name:	Salesforce Certified JavaScript Developer I - Multiple Choice Exam (JS-Dev-101)
Exam Number:	JS-Dev-101
Available Languages:	English
Exam Duration:	105 minutes
Related Certifications:	Salesforce Platform Developer II Salesforce Platform Developer I
Passing Score:	65%
Real Exam Qty:	60 (multiple choice)
Certificate Validity Period:	1 year (maintenance required annually in Salesforce certification program)
Exam Price:	$200 USD
Exam Format:	Multiple Choice Questions, Multiple Select Questions
Recommended Training:	MDN Web Docs - JavaScript Guide Salesforce Trailhead - JavaScript Developer I
Exam Registration:	Salesforce Certification Registration Kryterion Webassessor (Exam Delivery)
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

>> Exam JS-Dev-101 Pattern <<

Best JS-Dev-101 Preparation Materials, Test JS-Dev-101 Cram Review

Having more competitive advantage means that you will have more opportunities and have a job that will satisfy you. This is why more and more people have long been eager for the certification of JS-Dev-101. Our JS-Dev-101 test material can help you focus and learn effectively. You don't have to worry about not having a dedicated time to learn every day. You can learn our JS-Dev-101 exam torrent in a piecemeal time, and you don't have to worry about the tedious and cumbersome learning content. We will simplify the complex concepts by adding diagrams and examples during your study. By choosing our JS-Dev-101 test material, you will be able to use time more effectively than others and have the content of important information in the shortest time.

Salesforce JS-Dev-101 Exam Syllabus Topics:

Topic	Details
Topic 1	Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.
Topic 2	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.
Topic 3	Variables, Types, and Collections: Covers declaring and initializing variables, working with strings, numbers, dates, arrays, and JSON, along with understanding type coercion and truthy falsy evaluations.
Topic 4	Server Side JavaScript: Covers Node.js implementations, CLI commands, core modules, and package management solutions for given scenarios.
Topic 5	Objects, Functions, and Classes: Covers function, object, and class implementations to meet business requirements, along with the use of modules, decorators, variable scope, and execution flow.
Topic 6	Browser and Events: Covers DOM manipulation, event handling and propagation, browser-specific APIs, and using Browser Developer Tools to inspect code behavior.

Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q29-Q34):

NEW QUESTION # 29
Code:
01 let array = [1, 2, 3, 4, 4, 5, 4, 4];
02 for (let i = 0; i < array.length; i++) {
03 if (array[i] === 4) {
04 array.splice(i, 1);
05 i--;
06 }
07 }
What is the value of array after execution?

A. [1,2,3,5]
B. [1,2,3,4,5,4,4]
C. [1,2,3,4,5,4]
D. [1,2,3,4,4,5,4]

Answer: A

Explanation:
Initial array:
[1, 2, 3, 4, 4, 5, 4, 4]
The loop removes every value equal to 4:
array.splice(i, 1) removes the element at index i and shifts all later elements left.
i-- ensures the next index is checked correctly after the shift, preventing skipping elements.
Step-by-step removal:
Remove the first 4 → array becomes [1,2,3,4,5,4,4]
Remove next 4 → [1,2,3,5,4,4]
Remove next 4 → [1,2,3,5,4]
Remove last 4 → [1,2,3,5]
Final result:
[1,2,3,5]
Option B is correct.
JavaScript Knowledge Reference (text-only)
splice(index, deleteCount) removes elements and shifts remaining items.
Adjusting the loop index when deleting prevents skipping items.
Arrays update length dynamically after splice().

NEW QUESTION # 30
Given the JavaScript below:
01 function filterDOM(searchString){
02 const parsedSearchString = searchString && searchString.toLowerCase();
03 document.querySelectorAll('.account').forEach(account => {
04 const accountName = account.innerHTML.toLowerCase();
05 account.style.display = accountName.includes(parsedSearchString) ? /* Insert code here */;
06 });
07 }
Which code should replace the placeholder comment on line 05 to hide accounts that do not match the search string?

A. 'block' : 'none'
B. 'hidden' : 'visible'
C. 'visible' : 'hidden'
D. 'none' : 'block'

Answer: A

Explanation:
We have a ternary:
account.style.display = accountName.includes(parsedSearchString)
? /* if true */
: /* if false */;
Requirement:
If the account matches the search string → show it.
If it does not match → hide it.
For display:
Show: 'block' (or similar visible value).
Hide: 'none'.
So we want:
account.style.display = accountName.includes(parsedSearchString)
? 'block'
: 'none';
That corresponds to option A.
Why others are wrong:
B, C use values suitable for visibility, not display.
D ('none' : 'block') inverts the logic, hiding matches and showing non-matches.
________________________________________

NEW QUESTION # 31
Refer to the code below:

What is the output of this function when called with an empty array?

A. Return Infinity
B. Return NaN
C. Return 0
D. Return 5

Answer: D

NEW QUESTION # 32
A class was written to represent items for purchase in an online store, and a second class representing items that are on sale at a discounted price. The constructor sets the name to the first value passed in. There is a new requirement for a developer to implement a description method that will return a brief description for Item and SaleItem.
01 let regItem = new Item('Scarf', 55);
02 let saleItem = new SaleItem('Shirt', 80, .1);
03 Item.prototype.description = function() { return 'This is a ' + this.name; }
04 console.log(regItem.description());
05 console.log(saleItem.description());
06
07 SaleItem.prototype.description = function() { return 'This is a discounted ' + this.name; } What is the output when executing the code above?

A. This is a Scarf
Uncaught TypeError: saleItem.description is not a function
This is a Scarf
This is a discounted Shirt
B. This is a Scarf
This is a Shirt
This is a discounted Scarf
This is a discounted Shirt
C. This is a Scarf
Uncaught TypeError: saleItem.description is not a function
This is a Shirt
This is a discounted Shirt
D. This is a Scarf
This is a Shirt
This is a Scarf
This is a discounted Shirt

Answer: D

Explanation:
Comprehensive and Detailed
Assuming SaleItem inherits from Item via prototype (e.g. SaleItem.prototype = Object.create(Item.prototype)):
Lines 01-02: create regItem and saleItem.
Line 03: define Item.prototype.description.
Now both regItem and saleItem (via inheritance) have a description method from Item.prototype.
Line 04: regItem.description() → 'This is a Scarf'.
Line 05: saleItem.description() → 'This is a Shirt' (same method, but this.name is 'Shirt').
Line 07: SaleItem.prototype.description = ... overrides description only for SaleItem instances going forward.
If we imagine calling regItem.description() and saleItem.description() again after line 07:
regItem.description() still uses Item.prototype.description → 'This is a Scarf'.
saleItem.description() now uses SaleItem.prototype.description → 'This is a discounted Shirt'.
Those four lines correspond to option B.

NEW QUESTION # 33
Refer to the following array:
Let arr1 = [ 1,2, 3, 4, 5 ];

Which two lines of code result in a second array, arr2 being created such that arr2 is not a reference to arr1?

A. Let arr2 = Array.from(arr1);
B. Let arr2 = arr1.slice(0, 5);
C. Let arr2 = arr1.sort();
D. Let arr2 = arr1;

Answer: A,B

NEW QUESTION # 34
......

Best JS-Dev-101 Preparation Materials: https://www.surepassexams.com/JS-Dev-101-exam-bootcamp.html

P.S. Free & New JS-Dev-101 dumps are available on Google Drive shared by SurePassExams: https://drive.google.com/open?id=1VA9lVLOLxZlVT7mB3ZBZQz9fFUuVlWyW