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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
Related Certifications:	Lightning Web Components Specialist Superbadge Salesforce Certified JavaScript Developer I
Real Exam Qty:	60 (plus up to 5 unscored pilot questions)
Exam Format:	Multiple Choice, Multiple Select
Exam Price:	$200 USD
Available Languages:	English
Exam Duration:	105 minutes
Certificate Validity Period:	Lifetime (No renewal required)
Passing Score:	65%
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	Server Side JavaScript: Covers Node.js implementations, CLI commands, core modules, and package management solutions for given scenarios.
Topic 2	Objects, Functions, and Classes: Covers function, object, and class implementations to meet business requirements, along with the use of modules, decorators, variable scope, and execution flow.
Topic 3	Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.
Topic 4	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.
Topic 5	Asynchronous Programming: Covers asynchronous programming concepts and understanding how the event loop controls execution flow and determines outcomes.
Topic 6	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.

Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q129-Q134):

NEW QUESTION # 129
Refer to the string below.
Const str='Salesforce';
Which two statementsresults in the word 'Sales'?

Answer:

Explanation:
See the Answer below in explanation

NEW QUESTION # 130
Refer to the code below:

Which value can a developer expect when referencing country,capital,cityString?

A. An error
B. undefined
C. 'NaN'
D. 'London'

Answer: C

NEW QUESTION # 131
Given code below:
setTimeout (()=> (
console.log(1);
). 0);
console.log(2);
New Promise ((resolve, reject )) = > (
setTimeout(() => (
reject(console.log(3));
). 1000);
)).catch(() => (
console.log(4);
));
console.log(5);
What is logged to the console?

A. 2 1 4 3 5
B. 2 5 1 3 4
C. 1 2 43 5
D. 1 2 5 3 4

Answer: B

NEW QUESTION # 132
The developer has a function that prints "Hello" to an input name. To test this,thedeveloper created a function that returns "World". However the following snippet does not print " Hello World".

What can the developer do to change the code to print "Hello World" ?

A. Change line 7 to ) () ;
B. Change line 5 to function world ( ) {
C. Change line 2 to console.log('Hello' ,name() );
D. Change line 9 to sayHello(world) ();

Answer: C

NEW QUESTION # 133
A developer is wondering whether to use, Promise.then or Promise.catch, especially when a Promise throws an error?
Which two promises are rejected?
Which 2 are correct?

A. Promise.reject('cool error here').catch(error => console.error(error));
B. Promise.reject('cool errorhere').then(error => console.error(error));
C. New Promise(() => (throw 'cool error here'}).then(null, error => console.error(error)));
D. New Promise((resolve, reject) => (throw 'cool error here'}).catch(error =>console.error(error)) ;

Answer: A,D

NEW QUESTION # 134
......

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