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Salesforce JavaScript-Developer-I Exam Overview:

Certification Vendor:	Salesforce
Exam Name:	Salesforce Certified JavaScript Developer I
Exam Number:	JS-Dev-101
Passing Score:	65%
Real Exam Qty:	60 (plus up to 5 unscored pilot questions)
Certificate Validity Period:	None (Credential does not expire)
Related Certifications:	Salesforce Certified JavaScript Developer I Credential
Available Languages:	English
Exam Price:	$200 USD
Exam Duration:	105 minutes
Exam Format:	Multiple-select, Multiple-choice
Sample Questions:	Salesforce JavaScript-Developer-I Sample Questions
Exam Way:	Online (proctored via Pearson VUE) or On-site (at a Pearson VUE testing center)
Pre Condition:	None required. 1-2 years of JavaScript development experience (front-end and/or back-end) is strongly recommended. Note: To earn the full credential, candidates must also pass the Lightning Web Components Specialist Superbadge in addition to the JS-Dev-101 exam.
Official Syllabus URL:	https://trailhead.salesforce.com/en/credentials/javascriptdeveloperi

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Salesforce JavaScript-Developer-I Certification Exam is designed to evaluate the skills and knowledge of developers who work with JavaScript in the Salesforce platform. Salesforce Certified JavaScript Developer (JS-Dev-101) certification is intended for individuals who are responsible for designing, developing, and deploying custom solutions in Salesforce using JavaScript. JavaScript-Developer-I Exam is an excellent opportunity for developers to demonstrate their expertise and advance their careers in the Salesforce ecosystem.

Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q98-Q103):

NEW QUESTION # 98
Refer to the following object:

How can a developer access the fullname property for cat?

A. Cat.fullname ( )
B. Cat.function.fullName
C. Cat.fullName
D. Cat,get,fullname

Answer: D

NEW QUESTION # 99
A developer at Universal Containers is creating their new landing page basedon HTML, CSS, and JavaScript.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage is fully loaded (HTML content and all related files), in order to do some custom initializations.
Which implementation should be used to call Fe:s:-a;::eHec5;te::.-.ter.: based on the business requirement above?

A. Add a listener to thewindow object to handle the DOMContentLoaded event
B. Add a handler to the personalizeWebsiteContent script tohandle the DOMContentLoaded event
C. Add a listener to the window object to handle the lead event
D. Add a handler to the personalizeWebsiteContent script to handlethe load event

Answer: C

NEW QUESTION # 100
A Developer wrote the following code to test a sum3 function that takes in an array of
numbers and returns the sum of the first three number in the array, The test passes:
Let res = sum2([1, 2, 3 ]) ;
console.assert(res === 6 );
Res = sum3([ 1, 2, 3, 4]);
console.assert(res=== 6);
A different developer made changes to the behavior of sum3 to instead sum all of the numbers
present in the array. The test passes:
Which two results occur when running the test on the updated sum3 function ?
Choose 2 answers

A. The line 05 assertion passes.
B. The line 05 assertion fails.
C. The line 02 assertion passes.
D. The line 02 assertion fails

Answer: B,C

NEW QUESTION # 101
Given two expressions, exp1 and exp2, which two valid ways return the logical AND of the two expressions and ensure it is a Boolean?

A. Boolean(exp1 & & exp2)
B. Boolean(var1) & & Boolean(var2)
C. exp1 & exp2
D. Boolean(exp1) & & Boolean(exp2)

Answer: A,D

Explanation:
The correct answers are A and B .
The original question contains a typing error where 66 should be corrected to the logical AND operator:
& &
A is correct because it first evaluates the logical AND expression and then converts the final result to a Boolean:
Boolean(exp1 & & exp2)
The & & operator returns the first falsy value or the last truthy value. Wrapping the result in Boolean() ensures the final result is strictly either:
true
or:
false
Example:
Boolean( " hello " & & 123);
This returns:
true
B is also correct because it converts both expressions to Boolean values first, then applies logical AND:
Boolean(exp1) & & Boolean(exp2)
This guarantees that both sides of the & & operation are Boolean values.
Example:
Boolean( " hello " ) & & Boolean(123);
This returns:
true
C is incorrect because it uses the bitwise AND operator:
&
This is not the same as logical AND:
& &
Bitwise AND converts values into numbers and compares their binary representation. It does not reliably return a Boolean logical result.
D is incorrect as written because the question gives the expressions as exp1 and exp2, but option D uses var1 and var2. After correction, it would be the same idea as option B.
Therefore, the verified answers are A and B .

NEW QUESTION # 102
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 tls = require('tls');
B. const https =require('https');
C. const http =require('http');
D. const server =require('secure-server');

Answer: B

NEW QUESTION # 103
......

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