JavaScript-Developer-I Training Materials & JavaScript-Developer-I Certification Training & JavaScript-Developer-I Exam Questions

BONUS!!! Download part of Actual4test JavaScript-Developer-I dumps for free: https://drive.google.com/open?id=1HzDcBU85BtJprmrDEnYNK6r-6kJ6eZCM

We hope this article has given you a good overview of the Salesforce JavaScript-Developer-I Exam and what you can expect from it. As always, we recommend you start preparing for your exam as early as possible to give yourself the best chance of success. Actual4test offers a wide range of study materials and resources to help you prepare, including practice questions, dumps, and a study guide.

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Objectives
Topic 1: Browser and DOM Interaction	- Browser APIs (fetch, storage, timers) - Event handling and propagation - DOM manipulation and traversal
Topic 2: Salesforce Platform Integration	- Calling Apex methods from JavaScript - Security considerations in Salesforce JavaScript - Lightning Web Components (LWC) JavaScript usage
Topic 3: JavaScript Language Fundamentals	- Data types, variables, and operators - Functions, scope, and closures - ES6+ syntax and features
Topic 4: Testing and Debugging	- Unit testing principles - Debugging techniques and tools
Topic 5: Asynchronous JavaScript	- Error handling in async workflows - Promises and async/await - Event loop and concurrency model

>> JavaScript-Developer-I Practical Information <<

2026 JavaScript-Developer-I Practical Information 100% Pass | Efficient JavaScript-Developer-I Learning Materials: Salesforce Certified JavaScript Developer (JS-Dev-101)

It is our promissory announcement on our JavaScript-Developer-I exam questions that you will get striking by these viable ways. So do not feel giddy among tremendous materials in the market ridden-ed by false materials. With great outcomes of the passing rate upon to 98-100 percent, our JavaScript-Developer-I Preparation braindumps are totally the perfect one. And you can find the comments and feedbacks on our website to see that how popular and excellent our JavaScript-Developer-I study materials are.

Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q145-Q150):

NEW QUESTION # 145
Refer to the code below:
class Student {
constructor(name) {
this._name = name;
}
displayGrade() {
console.log(`${this._name} got 70% on test.`);
}
}
class GraduateStudent extends Student {
constructor(name) {
super(name);
this._name = " Graduate Student " + name;
}
displayGrade() {
console.log(`${this._name} got 100% on test.`);
}
}
let student = new GraduateStudent( " Jane " );
student.displayGrade();
What is the console output?

A. Better student Jackie got 70% on test.
B. Graduate Student Jane got 100% on test.
C. Jackie got 70% on test.
D. Uncaught ReferenceError

Answer: B

Explanation:
The correct answer is C , after correcting the option text to match the actual code.
The object is created here:
let student = new GraduateStudent( " Jane " );
Because GraduateStudent extends Student, its constructor runs:
constructor(name) {
super(name);
this._name = " Graduate Student " + name;
}
The call to:
super(name);
runs the parent Student constructor first and temporarily sets:
this._name = " Jane " ;
Then this line in the child constructor overwrites that value:
this._name = " Graduate Student " + name;
So the final value of this._name becomes:
" Graduate Student Jane "
Next, this line executes:
student.displayGrade();
Since student is an instance of GraduateStudent, JavaScript uses the overridden displayGrade() method from GraduateStudent, not the parent method from Student.
The executed method is:
displayGrade() {
console.log(`${this._name} got 100% on test.`);
}
Therefore, the console output is:
Graduate Student Jane got 100% on test.
Important correction: the original option C said something like " Better student Jackie got 100% on test. " , but the actual code uses " Graduate Student " and the name " Jane " . The verified corrected answer remains C
.

NEW QUESTION # 146
Given the code below:

What is logged to the console'

A. 2 5 1 3 4
B. 1 2 3 4 5
C. 2 5 3 4 1
D. 1 2 5 3 4

Answer: C

NEW QUESTION # 147
Refer to the following code:

Which two statement could be inserted at line 17 to enable the function call on line 18?
Choose 2 answers

A. leo.prototype.roar = ( ) =>( console.log('They\'re pretty good!'); };
B. Object.assign (leo. Tiger);
C. leo.roar = () => { console.log('They\'re pretty good!'); );
D. Object.assign (leo, tony);

Answer: C,D

NEW QUESTION # 148
Refer to the code below:
function foo () {
const a =2;
function bat() {
console.log(a);
}
return bar;
}
Why does the function bar have access to variable a ?

A. Hoisting
B. Prototype chain
C. Inner function's scope
D. Outer function's scope

Answer: D

NEW QUESTION # 149
A developer has a fizzbuzz function that, when 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 nor 5.
Which two test cases properly test scenarios for the fizzbuzz function?

A. let res = fizzbuzz(Infinity);
console.assert(res === ' ' );
B. let res = fizzbuzz(3);
console.assert(res === ' buzz ' );
C. let res = fizzbuzz(NaN);
console.assert(isNaN(res));
D. let res = fizzbuzz(15);
console.assert(res === ' fizzbuzz ' );

Answer: A,D

Explanation:
The correct answers are B and D .
A strong test case checks whether the actual output matches the expected behavior of the function.
For Option B :
let res = fizzbuzz(15);
console.assert(res === ' fizzbuzz ' );
The number 15 is divisible by both 3 and 5:
15 % 3 === 0
15 % 5 === 0
So the correct return value is:
' fizzbuzz '
That makes option B a valid test.
For Option D :
let res = fizzbuzz(Infinity);
console.assert(res === ' ' );
Infinity is not a normal finite divisible number. In JavaScript:
Infinity % 3
Infinity % 5
produce NaN, and comparisons such as:
Infinity % 3 === 0
are false.
So a typical fizzbuzz implementation would not treat Infinity as divisible by 3 or 5, meaning it should return:
' '
That makes option D a valid test for the "neither divisible by 3 nor 5" path.
Now compare the incorrect options:
Option A is wrong because:
fizzbuzz(3)
should return:
' fizz '
not:
' buzz '
Option C is wrong because the function specification says the function returns strings such as ' fizz ' , ' buzz '
, ' fizzbuzz ' , or ' ' . It does not say the function returns numeric NaN.
So this assertion is not appropriate:
console.assert(isNaN(res));
Therefore, the verified answers are B and D .

NEW QUESTION # 150
......

Our desktop-based Salesforce Certified JavaScript Developer (JS-Dev-101) (JavaScript-Developer-I) practice exam software needs no internet connection. The web-based Salesforce Certified JavaScript Developer (JS-Dev-101) (JavaScript-Developer-I) practice exam is similar to the desktop-based software. You can take the web-based Salesforce Certified JavaScript Developer (JS-Dev-101) (JavaScript-Developer-I) practice exam on any browser without needing to install separate software. In addition, all operating systems also support this web-based Salesforce JavaScript-Developer-I Practice Exam. Both Salesforce Certified JavaScript Developer (JS-Dev-101) (JavaScript-Developer-I) practice exams track your performance and help to overcome mistakes. Furthermore, you can customize your Building Salesforce Certified JavaScript Developer (JS-Dev-101) (JavaScript-Developer-I) practice exams according to your needs.

JavaScript-Developer-I Learning Materials: https://www.actual4test.com/JavaScript-Developer-I_examcollection.html

2026 Latest Actual4test JavaScript-Developer-I PDF Dumps and JavaScript-Developer-I Exam Engine Free Share: https://drive.google.com/open?id=1HzDcBU85BtJprmrDEnYNK6r-6kJ6eZCM