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Salesforce JS-Dev-101 Exam Overview:

Certification Vendor:	Salesforce
Exam Name:	Salesforce Certified JavaScript Developer I
Exam Number:	JS-Dev-101
Exam Format:	Multiple Select, Multiple Choice
Exam Price:	$200 USD
Available Languages:	English
Related Certifications:	Salesforce Certified JavaScript Developer I Lightning Web Components Specialist Superbadge
Real Exam Qty:	60 (plus up to 5 unscored pilot questions)
Passing Score:	65%
Exam Duration:	105 minutes
Certificate Validity Period:	Lifetime (No renewal required)
Sample Questions:	Salesforce JS-Dev-101 Sample Questions
Exam Way:	Online (Proctored)
Pre Condition:	Completion of the Lightning Web Components Specialist Superbadge is required to earn the full credential, though it can be completed before or after the exam.
Official Syllabus URL:	https://trailhead.salesforce.com/en/credentials/javascriptdeveloperi

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Salesforce JS-Dev-101 Exam Syllabus Topics:

Topic	Details
Topic 1	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 2	Asynchronous Programming: Covers asynchronous programming concepts and understanding how the event loop controls execution flow and determines outcomes.
Topic 3	Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.
Topic 4	Browser and Events: Covers DOM manipulation, event handling and propagation, browser-specific APIs, and using Browser Developer Tools to inspect code behavior.
Topic 5	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.

Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q63-Q68):

NEW QUESTION # 63
Refer to the code below:
flag();
function flag() {
console.log('flag');
}
const anotherFlag = () => {
console.log('another flag');
}
anotherFlag();
What is result of the code block?

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

Answer: C

Explanation:
Key points:
Function declarations are hoisted (their definitions are available before the line where they appear).
Function expressions assigned to const or let are not hoisted as callable functions, but here anotherFlag is only used after it is defined.
Step-by-step:
flag(); at the top:
flag is a function declaration defined later; due to hoisting, it is available.
It logs 'flag'.
The declaration:
function flag() {
console.log('flag');
}
is already in effect (hoisted before execution).
const anotherFlag = () => { console.log('another flag'); } defines anotherFlag as an arrow function.
anotherFlag(); is called after its definition; this is valid and logs 'another flag'.
No errors occur. The console output is:
flag
another flag
So option D is correct.
Concepts: function hoisting, difference between function declarations and function expressions, execution order.

NEW QUESTION # 64
A developer wants to define a function log to be used a few times on a single-file JavaScript script.
01 // Line 1 replacement
02 console.log('"LOG:', logInput);
03 }
Which two options can correctly replaceline 01 and declare the function for use?
Choose 2 answers

A. function leg(logInput) {
B. const log = (logInput) => {
C. function log = (logInput) {
D. const log(loginInput) {

Answer: A,B

NEW QUESTION # 65
A developer has a formatName function that takes two arguments, firstName and lastName and returns a string. They want to schedule the function to run once after five seconds.
What is the correct syntax toschedule this function?

A. setTimout(() => { formatName("John', 'Doe') }, 5000);
B. setTimeout (formatName(), 5000, "John", "BDoe");
C. setTimeout ('formatName', 5000, 'John", "Doe');
D. setTimeout (formatName('John', ''Doe'), 5000);

Answer: C

NEW QUESTION # 66
Referto the following code:

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

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

Answer: A,D

NEW QUESTION # 67
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 format, what should the new package version number be?

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

Answer: D

NEW QUESTION # 68
......

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