真實的新版JavaScript-Developer-I題庫擁有模擬真實考試環境與場境的軟件VCE版本＆100％通過率的JavaScript-Developer-I測試引擎

BONUS!!! 免費下載PDFExamDumps JavaScript-Developer-I考試題庫的完整版：https://drive.google.com/open?id=1T1-V0o8VfEbVHpgM1kdE-rPilyv2TUev

你買了PDFExamDumps的產品，我們會全力幫助你通過認證考試，而且還有免費的一年更新升級服務。如果官方改變了認證考試的大綱，我們會立即通知客戶。如果有我們的軟體有任何更新版本，都會立即推送給客戶。PDFExamDumps是可以承諾幫你成功通過你的第一次Salesforce JavaScript-Developer-I 認證考試。

Salesforce JavaScript-Developer-I Exam Overview:

Certification Vendor:	Salesforce
Exam Name:	Salesforce Certified JavaScript Developer I Exam
Exam Number:	JS-Dev-101 / JavaScript-Developer-I
Exam Price:	USD 200 (+ applicable taxes)
Passing Score:	65%
Real Exam Qty:	60 scored + up to 5 unscored
Certificate Validity Period:	No expiration; requires regular maintenance via Trailhead modules
Exam Duration:	105 minutes
Exam Format:	Multiple-choice, Multiple-select
Available Languages:	Japanese, English
Related Certifications:	Salesforce Certified Lightning Web Components Specialist Salesforce Certified Platform Developer I
Recommended Training:	Salesforce JavaScript Developer I Certification Prep
Exam Registration:	Salesforce Certification Registration
Sample Questions:	Salesforce JavaScript-Developer-I Sample Questions
Exam Way:	Online proctored or onsite at authorized testing centers
Pre Condition:	No formal prerequisites; 1–2 years of JavaScript development experience recommended
Official Syllabus URL:	https://trailhead.salesforce.com/credentials/javascript-developer-i

>> 新版JavaScript-Developer-I題庫 <<

完美的Salesforce 新版JavaScript-Developer-I題庫是行業領先材料＆實用的JavaScript-Developer-I：Salesforce Certified JavaScript Developer (JS-Dev-101)

PDFExamDumps不僅為你提供優秀的資料，而且還為你提供優質的服務。如果你購買了PDFExamDumps的考古題，PDFExamDumps將為你提供一年的免費更新。這樣你就可以一直擁有最新的JavaScript-Developer-I試題資料。而且，萬一你用了JavaScript-Developer-I考古題以後，考試還是失敗的話，PDFExamDumps保證全額退款。這樣一來，你還擔心什麼呢？PDFExamDumps對自己的資料有足夠的信心，你也要對PDFExamDumps有足夠的信心。為了你的考試能夠成功，千萬不要錯過PDFExamDumps這個網站。因為如果錯過了它，你就等於錯失了一次成功的機會。

要通過 Salesforce 資深 JavaScript 開發人員 I 考試，考生需要熟悉 JavaScript 編程語言及其在 Salesforce 平台上的應用。考試包含 60 道多選題，需要通過 68% 的及格分數。考試可以線上進行，考生有 105 分鐘的時間完成考試。

最新的 Salesforce Developer JavaScript-Developer-I 免費考試真題 (Q129-Q134):

問題 #129
A developer wants to set up a secure web server with Node.js. The developer create 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 http = require ('https') ;
B. Const tls = require ('tls') ;
C. Const http = require ('http');
D. Const server = require ( 'secure-server') ;

答案：A

問題 #130
Which statement accurately describes the behaviour of the async/ await keyworks ?

A. The associated function will always return a promise
B. The associated sometimes returns a promise.
C. The associated class contains some asynchronous functions.
D. The associated function can only be called via asynchronous methods

答案：B

問題 #131
Original constructor function:
01 function Vehicle(name, price) {
02 this.name = name;
03 this.price = price;
04 }
05 Vehicle.prototype.priceInfo = function () {
06 return `Cost of the $(this.name) is $(this.price)$`;
07 }
08 var ford = new Vehicle( ' Ford Fiesta ' , ' 20,000 ' );
Which class definition is correct?

A. class Vehicle {
vehicle(name, price) {
this.name = name;
this.price = price;
}
priceInfo() {
return ' Cost of the ${this.name} is ${this.price}$ ' ;
}
}
B. class Vehicle {
constructor(name, price) {
this.name = name;
this.price = price;
}
priceInfo() {
return `Cost of the ${this.name} is ${this.price}$`;
}
}
C. class Vehicle {
constructor(name, price) {
this.name = name;
this.price = price;
}
priceInfo() {
return ' Cost of the ${this.name} is ${this.price}$ ' ;
}
}
D. class Vehicle {
constructor() {
this.name = name;
this.price = price;
}
priceInfo() {
return `Cost of the ${this.name} is ${this.price}$`;
}
}

答案：B

解題說明：
A correct conversion from constructor-function syntax to ES6 class syntax must satisfy:
* Use a constructor(name, price) method.
* Assign instance properties inside the constructor.
* Define methods without function keyword directly in the class body.
* Use proper JavaScript template literals (backticks).
Evaluate each option:
Option A
Incorrect template literal syntax: uses single quotes with ${} which will not interpolate.
Option B
Incorrect:
* The method vehicle() is not recognized as a constructor.
* The constructor method is missing.
Option C
Incorrect:
* The constructor has no parameters, but uses name and price which are undefined.
Option D
Correct:
* Uses proper constructor with parameters.
* Correct assignment of instance properties.
* Correct template literal using backticks.
This is the valid ES6 class translation.
JavaScript Knowledge References (text-only)
* ES6 classes require a constructor method for initialization.
* Template literals must use backticks.
* Methods inside classes are defined without the function keyword.
* Omitted constructor parameters lead to undefined instance fields.

問題 #132
Refer to the code below:
01 const server = require( ' server ' );
02
03 // Insert code here
A developer imports a library that creates a web server. The imported library uses events and callbacks to start the server.
Which code should be inserted at line 03 to set up an event and start the web server?

A. server.on( ' connect ' , (port) = > { console.log( ' Listening on ' , port); });
B. server();
C. server((port) = > { console.log( ' Listening on ' , port); });
D. server.start();

答案：C

解題說明：
The question specifies:
* The library "uses events and callbacks to start the server".
* We want to "set up an event and start the web server".
Option C:
server((port) = > { console.log( ' Listening on ' , port); });
This:
* Calls server(...), which (by design in such libraries) typically starts the web server.
* Passes a callback function that receives port when the server is ready.
* Inside the callback, it logs " Listening on < port > " .
This matches the "events and callbacks" description: the callback is invoked when the server has started listening.
Why others are incorrect:
* A. server.on( ' connect ' , ...)
* Assumes server is an event emitter instance with a ' connect ' event, which is not given. Also, this line alone would not start the server.
* B. server.start();
* Assumes a start method exists; the question says the library "uses events and callbacks to start," implying invocation with a callback, not a plain start() call.
* D. server();
* Might start the server, but does not "set up an event" or callback to know when or where it is listening.
Therefore, C aligns with the described usage.
Concepts: callback-based APIs, starting servers with callbacks, event/callback style vs simple method calls.

問題 #133
A team that works on a big project uses npm to deal with the project's dependencies.
A developer added a dependency to manipulated dates and pushed the updates to the remote repository. The rest of the team complains that the dependency does not get download when they execute npm install.
Which two reason could be possible explanation for this?

A. The developer added the dependency as a dev dependency, and NODK_ENV is set to production.
B. The developer missed the option -ssve when adding the dependency.
C. The developer added the dependency as a dev dependency, and NOOK_ENV is set to production.
D. The developer missed the option - add when adding the dependency.

答案：A,B,C

問題 #134
......

JavaScript-Developer-I測試引擎: https://www.pdfexamdumps.com/JavaScript-Developer-I_valid-braindumps.html

P.S. PDFExamDumps在Google Drive上分享了免費的、最新的JavaScript-Developer-I考試題庫：https://drive.google.com/open?id=1T1-V0o8VfEbVHpgM1kdE-rPilyv2TUev