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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q148-Q153):

NEW QUESTION # 148
Refer to the code below:

What is result of the code block?

A. The console logs flag' and then an error is thrown.
B. The console logs 'flag' and another flag',
C. The console logs only 'flag',
D. An error is thrown.

Answer: A

NEW QUESTION # 149
Given the following code:
let x = ( ' 15 ' + 10) * 2;
What is the value of x?

A. 0
B. 1
C. 2
D. 3

Answer: D

Explanation:
Comprehensive and Detailed Explanation:
Evaluate step by step:
* ' 15 ' + 10
* + with a string operand performs string concatenation.
* 10 is coerced to ' 10 ' .
* Result: ' 1510 ' .
* ' 1510 ' * 2
* * always performs numeric multiplication.
* ' 1510 ' is converted to the number 1510.
* 1510 * 2 = 3020.
So x is 3020.

NEW QUESTION # 150
Refer to the code:

Given the code above, which three properties are set pet1?
Choose 3 answers:

A. Owner
B. Name
C. Type
D. canTalk
E. Size

Answer: C,D,E

NEW QUESTION # 151
At Universal Containers, every team has its own way of copying JavaScript objects. The code Snippet shows an implementation from one team:
Function Person() {
this.firstName = "John";
this.lastName = 'Doe';
This.name =() => (
console.log('Hello $(this.firstName) $(this.firstName)');
)}
Const john = new Person ();
Const dan = JSON.parse(JSON.stringify(john));
dan.firstName ='Dan';
dan.name();
What is the Output of the code execution?

A. Hello John DOe
B. Hello Dan Doe
C. TypeError: dan.name is not a function
D. TypeError: Assignment to constant variable.

Answer: C

NEW QUESTION # 152
A developer wants to iterate through an array of objects and count the objects and count the objects whose property value, name, starts with the letter N.
Const arrObj = [{"name" : "Zach"} , {"name" : "Kate"},{"name" : "Alise"},{"name" : "Bob"},{"name" :
"Natham"},{"name" : "nathaniel"}
Refer to the code snippet below:
01 arrObj.reduce(( acc, curr) => {
02 //missing line 02
02 //missing line 03
04 ). 0);
Which missing lines 02 and 03 return the correct count?

A. Const sum = curr.startsWith('N') ? 1: 0;
Return acc +sum
B. Const sum = curr.name.startsWIth('N') ? 1: 0;
Return curr+ sum
C. Const sum = curr.startsWIth('N') ? 1: 0;
Return curr+ sum
D. Const sum = curr.name.startsWith('N') ? 1: 0;
Return acc +sum

Answer: D

NEW QUESTION # 153
......

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