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Salesforce JavaScript-Developer-I exam is designed to test the skills and knowledge of developers who specialize in JavaScript development on the Salesforce platform. Salesforce Certified JavaScript Developer (JS-Dev-101) certification is perfect for developers who want to demonstrate their expertise in building custom applications using JavaScript on the Salesforce platform. JavaScript-Developer-I Exam covers a variety of topics, including Apex, Visualforce, and Lightning Web Components, and is designed to test a developer's ability to design, develop, and maintain custom applications on the Salesforce platform.

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To become a Salesforce Certified JavaScript Developer I, candidates must pass the JavaScript-Developer-I Exam. JavaScript-Developer-I exam consists of 60 multiple-choice questions that must be completed within 105 minutes. JavaScript-Developer-I exam is designed to test a candidate's knowledge of JavaScript development on the Salesforce platform, as well as their ability to design, develop, and maintain custom applications. Candidates must achieve a passing score of 68% or higher to earn the certification. Once certified, developers will have demonstrated their expertise in JavaScript development on the Salesforce platform, making them more valuable to potential employers and clients.

Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q146-Q151):

NEW QUESTION # 146
A developer executes:
document.cookie;
document.cookie = ' key=John Smith ' ;
What is the behavior?

A. Cookies are read and the key value is set, the remaining cookies are unaffected.
B. Cookies are read, but the key value is not set because the value is not URL encoded.
C. Cookies are read and the key value is set, and all cookies are wiped.
D. Cookies are not read because line 01 should be document.cookies, but the key value is set and all cookies are wiped.

Answer: A

Explanation:
* document.cookie retrieves the cookie string.
* Setting document.cookie = ' key=John Smith ' adds or updates only that one cookie.
Important details:
* Writing to document.cookie does not overwrite all cookies .
* The browser does not require URL encoding , though it is recommended. Non-encoded spaces are allowed and automatically handled.
* document.cookies does not exist; the correct property is document.cookie.
Therefore, the correct behavior:
* Cookies are read.
* A new cookie key=John Smith is set.
* Existing cookies remain.
JavaScript Knowledge References (text-only)
* Writing document.cookie appends or updates cookies, not replaces them.
* document.cookie is both getter and setter for cookie strings.

NEW QUESTION # 147
Refer to the following code:
01 class Ship {
02 constructor(size) {
03 this.size = size;
04 }
05 }
06
07 class FishingBoat extends Ship {
08 constructor(size, capacity){
09 //Missing code
10 this.capacity = capacity;
11 }
12 displayCapacity() {
13 console.log( ' The boat has a capacity of ${this.capacity} people. ' );
14 }
15 }
16
17 let myBoat = new FishingBoat( ' medium ' , 10);
18 myBoat.displayCapacity();
Which statement should be added to line 09 for the code to display
The boat has a capacity of 10 people?

A. super.size = size;
B. this.size = size;
C. ship.size = size;
D. super(size);

Answer: D

Explanation:
FishingBoat extends Ship, so it is a subclass. In ES6 classes:
* When you define a constructor in a subclass, you must call super(...) before accessing this.
* super(size) calls the parent class (Ship) constructor, which sets this.size = size.
So the correct constructor is:
class FishingBoat extends Ship {
constructor(size, capacity) {
super(size); // line 09
this.capacity = capacity;
}
displayCapacity() {
console.log(`The boat has a capacity of ${this.capacity} people.`);
}
}
Why others are incorrect:
* B. ship.size = size;
* ship is not defined; this would cause a ReferenceError.
* C. super.size = size;
* super is not an instance; you must call super(...) as a function to invoke the parent constructor.
* D. this.size = size;
* In a subclass constructor, you must call super() before using this, otherwise you get a ReferenceError. Also this bypasses the parent constructor logic.
Relevant concepts: ES6 class inheritance, extends, super() in subclass constructors, this initialization rules.

NEW QUESTION # 148
Refer to the expression below:
Let x = ('1' + 2) == (6 * 2);
How should this expression be modified to ensure that evaluates to false?

A. Let x = (1 + 2) == ( '6' / 2);
B. Let x = ('1' + 2) == ( 6 * 2);
C. Let x = ('1' + ' 2') == ( 6 * 2);
D. Let x = (1+ 2 ) == ( 6 / 2);

Answer: B

NEW QUESTION # 149
developer creates a new web server that uses Node.js. It imports a server library that uses events and callbacks for handling server functionality.
The server library is imported with require and is made available to the code by a variable named server. The developer wants to log any issues that the server has while booting up.
Given the code and the information the developer has, which code logs an error at boost with an event?

A. Server.error ((server) => {
console.log('ERROR', error);
});
B. Try{
server.start();
} catch(error) {
console.log('ERROR', error);
}
C. Server.on ('error', (error) => {
console.log('ERROR', error);
});
D. Server.catch ((server) => {
console.log('ERROR', error);
});

Answer: C

NEW QUESTION # 150
There is a new requirement for a developer to implement a currPrice method that will return the current price of the item or sales..

What is the output when executing the code above

A. 5080Uncaught ReferenceError:this,discount is undefined72
B. 0
C. 50Uncaught TypeError: saleItem,desrcription is not a function5080
D. 1

Answer: B

NEW QUESTION # 151
......

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