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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q109-Q114):

NEW QUESTION # 109
Refer to following code:
class Vehicle {
constructor(plate) {
This.plate =plate;
}
}
Class Truck extends Vehicle {
constructor(plate, weight) {
//Missing code
This.weight = weight;
}
displayWeight() {
console.log('The truck ${this.plate} has a weight of ${this.weight} lb.');}}
Let myTruck = new Truck('123AB', 5000);
myTruck.displayWeight();
Which statement should be added to line 09 for the code to display 'The truck 123AB has a
weight of 5000lb.'?

A. Vehicle.plate = plate;
B. This.plate =plate;
C. super(plate);
D. Super.plate =plate;

Answer: C

NEW QUESTION # 110
Refer to the code snippet below:
Let array = [1, 2, 3, 4, 4, 5, 4, 4];
For (let i =0; i < array.length; i++)
if (array[i] === 4) {
array.splice(i, 1);
}
}
What is the value of array after the code executes?

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

Answer: D

Explanation:

NEW QUESTION # 111
developer wants to use a module named universalContainersLib and them call functions from it.
How should a developer import every function from the module and then call the functions foo and bar ?

A. import * ad lib from '/path/universalContainersLib.js';
lib.foo();
lib.bar();
B. import all from '/path/universalContaineraLib.js';
universalContainersLib.foo();
universalContainersLib.bar();
C. import * from '/path/universalContaineraLib.js';
universalContainersLib.foo();
universalContainersLib.bar();
D. import (foo, bar) from '/path/universalContainersLib.js';
foo();
bar();

Answer: A

NEW QUESTION # 112
A developer wants to set up a secure web server with Node.js. The developer creates a
directory locally called app-server, and the first file is app-server/index.js
Without using any third-party libraries, what should the developer add to index.js to create the
secure web server?

A. const server =require('secure-server');
B. const http =require('http');
C. const https =require('https');
D. const tls = require('tls');

Answer: C

NEW QUESTION # 113
A developer copied a JavaScript object:

How does the developer access dan's forstName,lastName? Choose 2 answers

A. dan,name ( )
B. dan,firstname ( ) + dan, lastName ( )
C. dan,name
D. dan, firstName =dan.lastName

Answer: A,D

NEW QUESTION # 114
......

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