Quiz 2026 Salesforce Accurate JS-Dev-101: Authorized Salesforce Certified JavaScript Developer - Multiple Choice Test Dumps

Thanks to modern technology, learning online gives people access to a wider range of knowledge, and people have got used to convenience of electronic equipment. As you can see, we are selling our JS-Dev-101 learning guide in the international market, thus there are three different versions of our JS-Dev-101 exam materials which are prepared to cater the different demands of various people. We can guarantee that our JS-Dev-101 Exam Materials are the best reviewing material. Concentrated all our energies on the study JS-Dev-101 learning guide we never change the goal of helping candidates pass the exam. Our JS-Dev-101 test questions’ quality is guaranteed by our experts’ hard work. So what are you waiting for? Just choose our JS-Dev-101 exam materials, and you won’t be regret.

Salesforce JS-Dev-101 Exam Syllabus Topics:

Topic	Details
Topic 1	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.
Topic 2	Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.
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	Browser and Events: Covers DOM manipulation, event handling and propagation, browser-specific APIs, and using Browser Developer Tools to inspect code behavior.

>> Authorized JS-Dev-101 Test Dumps <<

JS-Dev-101 Online Lab Simulation | Latest JS-Dev-101 Exam Bootcamp

Every user has rated study material positively and passed the JS-Dev-101 Exam. ValidDumps gives a guarantee to the customers that if they fail to pass the Salesforce Certified JavaScript Developer - Multiple Choice (JS-Dev-101) certification on the very first try despite all their efforts they can claim their money back according to terms and conditions. A team of experts is working day and night in order to make the product successful day by day and provide the customers with the best experience.

Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q33-Q38):

NEW QUESTION # 33
A developer wants to use a try...catch statement to catch any error that countSheep() may throw and pass it to a handleError() function.
What is the correct implementation of the try...catch?

A. try {
countSheep();
} handleError (e){
catch(e);
}
B. setTimeout(function() {
try {
countSheep();
} catch (e) {
handleError(e);
}
}, 1000);
C. try {
setTimeout(function() {
countSheep();
}, 1000);
} catch (e) {
handleError(e);
}
D. try {
countSheep();
} finally {
handleError(e);
}

Answer: B

Explanation:
Comprehensive and Detailed
Errors thrown inside setTimeout callbacks occur asynchronously, in a different tick of the event loop. A try...catch around setTimeout itself (as in D) cannot catch errors thrown later in the scheduled callback.
To catch errors from countSheep() when it's called asynchronously, the try...catch must wrap the call inside the timeout callback:
setTimeout(function() {
try {
countSheep();
} catch (e) {
handleError(e);
}
}, 1000);
B uses finally incorrectly and references e out of scope.
C is not valid JavaScript syntax.
D's catch can only handle synchronous errors thrown before setTimeout returns, not those thrown inside the callback.
________________________________________

NEW QUESTION # 34
Refer to the following code:
function test (val) {
If (val === undefined) {
return 'Undefined values!' ;
}
if (val === null) {
return 'Null value! ';
}
return val;
}
Let x;
test(x);
What is returned by the function call on line 13?

A. 'Undefined values!'
B. Line 13 throws an error.
C. 'Null value!'
D. Undefined

Answer: A

NEW QUESTION # 35
A developer publishes a new version of a package with new features that do not break backward compatibility. The previous version number was 1.1.3.
Following semantic versioning formats, what should the new package version number be?

A. 1.2.3
B. 1.1.4
C. 2.0.0
D. 1.2.0

Answer: D

Explanation:
The correct answer is D.
Semantic versioning usually follows this format:
MAJOR.MINOR.PATCH
For the version:
1.1.3
The parts are:
1 = MAJOR
1 = MINOR
3 = PATCH
A package version should be updated based on the type of change:
MAJOR version changes when there are breaking changes.
MINOR version changes when new features are added in a backward-compatible way.
PATCH version changes when backward-compatible bug fixes are added.
The question says the developer added new features that do not break backward compatibility. That means the minor version should increase.
Starting version:
1.1.3
Increase the minor version from 1 to 2, and reset the patch version to 0:
1.2.0
Why the other options are incorrect:
A . 1.2.3 is incorrect because when the minor version increases, the patch version should reset to 0.
B . 1.1.4 is incorrect because that would represent a patch update, usually for bug fixes, not new features.
C . 2.0.0 is incorrect because that would represent a major version update, usually for breaking changes.
D . 1.2.0 is correct because it represents a backward-compatible feature release.
Therefore, the verified answe r is D.

NEW QUESTION # 36
Original constructor function:
01 function Vehicle(name, price) {
02 this.name = name;
03 this.price = price;
04 }
05 Vehicle.prototype.priceInfo = function () {
06 return `Cost of the $(this.name) is $(this.price)$`;
07 }
08 var ford = new Vehicle('Ford Fiesta', '20,000');
Which class definition is correct?

A. class Vehicle {
constructor(name, price) {
this.name = name;
this.price = price;
}
priceInfo() {
return 'Cost of the ${this.name} is ${this.price}$';
}
}
B. class Vehicle {
constructor(name, price) {
this.name = name;
this.price = price;
}
priceInfo() {
return `Cost of the ${this.name} is ${this.price}$`;
}
}
C. class Vehicle {
vehicle(name, price) {
this.name = name;
this.price = price;
}
priceInfo() {
return 'Cost of the ${this.name} is ${this.price}$';
}
}
D. class Vehicle {
constructor() {
this.name = name;
this.price = price;
}
priceInfo() {
return `Cost of the ${this.name} is ${this.price}$`;
}
}

Answer: B

Explanation:
________________________________________
Comprehensive and Detailed Explanation From Exact Extract JavaScript Knowledge A correct conversion from constructor-function syntax to ES6 class syntax must satisfy:
Use a constructor(name, price) method.
Assign instance properties inside the constructor.
Define methods without function keyword directly in the class body.
Use proper JavaScript template literals (backticks).
Evaluate each option:
________________________________________
Option A
Incorrect template literal syntax: uses single quotes with ${} which will not interpolate.
________________________________________
Option B
Incorrect:
The method vehicle() is not recognized as a constructor.
The constructor method is missing.
________________________________________
Option C
Incorrect:
The constructor has no parameters, but uses name and price which are undefined.
________________________________________
Option D
Correct:
Uses proper constructor with parameters.
Correct assignment of instance properties.
Correct template literal using backticks.
This is the valid ES6 class translation.
________________________________________
JavaScript Knowledge Reference (text-only)
ES6 classes require a constructor method for initialization.
Template literals must use backticks.
Methods inside classes are defined without the function keyword.
Omitted constructor parameters lead to undefined instance fields.

NEW QUESTION # 37
Value of:
true + 3 + '100' + null

A. "4100"
B. "2200null"
C. 0
D. "4100null"

Answer: D

Explanation:
The correct answer is A.
JavaScript evaluates the expression from left to right:
true + 3 + '100' + null
Step 1:
true + 3
In numeric addition, true is converted to:
1
So:
true + 3
becomes:
1 + 3
Result:
4
Step 2:
4 + '100'
Because one operand is a string, JavaScript performs string concatenation instead of numeric addition.
So:
4 + '100'
becomes:
"4100"
Step 3:
"4100" + null
Again, because one operand is already a string, JavaScript converts null into the string:
"null"
So the final result is:
"4100null"
Execution summary:
true + 3 + '100' + null
// 1 + 3 + '100' + null
// 4 + '100' + null
// "4100" + null
// "4100null"
Therefore, the verified answer is A.

NEW QUESTION # 38
......

The ValidDumps is committed to making the Salesforce Certified JavaScript Developer - Multiple Choice JS-Dev-101 exam questions the first preference of JS-Dev-101 exam candidates. To achieve this objective the ValidDumps offers the real and updated JS-Dev-101 dumps in three easy-to-use and compatible formats. These formats are Salesforce Certified JavaScript Developer - Multiple Choice JS-Dev-101 PDF dumps files, desktop practice test software, and web-based practice test software. All these three JS-Dev-101 Practice Questions type are easy to install and smoothly work with all devices, operating systems, and browsers.So you rest assured that with all JS-Dev-101 exam practice test questions you will get everything that you need to learn, prepare and pass the valuable JS-Dev-101 certification with good scores.

JS-Dev-101 Online Lab Simulation: https://www.validdumps.top/JS-Dev-101-exam-torrent.html