- Exam Code: JavaScript-Developer-I-JPN
- Exam Name: Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
- Updated: Sep 08, 2026
- Q & A: 149 Questions and Answers
Salesforce JavaScript-Developer-I日本語 actual dump : Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
PDF Version DemoAbout Salesforce JavaScript-Developer-I日本語 Exam Questions
The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) has a reputation for tripping up even experienced professionals. Actual4Dumps built its JavaScript-Developer-I日本語 practice questions for 2026 to mirror that difficulty, so nothing on exam day catches you off guard.
Salesforce JavaScript-Developer-I日本語 Exam Overview:
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I |
| Exam Number: | JS-Dev-001 |
| Exam Price: | USD 200 (may vary by region/tax) |
| Available Languages: | English |
| Certificate Validity Period: | 1 year (maintenance required via Salesforce certification maintenance modules) |
| Real Exam Qty: | 60 |
| Related Certifications: | Salesforce Certified Platform App Builder Salesforce Certified Platform Developer I Salesforce Certified JavaScript Developer I |
| Exam Duration: | 105 minutes |
| Exam Format: | Multiple Select, Multiple Choice |
| Passing Score: | 65% |
| Recommended Training: | Salesforce Developer Learning Paths Salesforce Trailhead JavaScript Developer I Prep |
| Exam Registration: | Salesforce Credentials Page Salesforce Certification Registration (Webassessor) |
| Sample Questions: |  |
| Exam Way: | Online proctored or onsite testing via Kryterion Webassessor |
| Pre Condition: | No formal prerequisites, but familiarity with JavaScript and Salesforce platform development is strongly recommended. |
| Official Syllabus URL: | https://trailhead.salesforce.com/credentials/javascriptdeveloper1 |
Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Asynchronous JavaScript | - Error handling in async workflows - Promises and async/await - Event loop and concurrency model |
| Topic 2: JavaScript Language Fundamentals | - ES6+ syntax and features - Functions, scope, and closures - Data types, variables, and operators |
| Topic 3: Salesforce Platform Integration | - Security considerations in Salesforce JavaScript - Calling Apex methods from JavaScript - Lightning Web Components (LWC) JavaScript usage |
| Topic 4: Testing and Debugging | - Debugging techniques and tools - Unit testing principles |
| Topic 5: Browser and DOM Interaction | - Event handling and propagation - DOM manipulation and traversal - Browser APIs (fetch, storage, timers) |
Common Questions About the Salesforce JavaScript-Developer-I日本語 Exam
The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) is the official Salesforce exam that leads to the JavaScript Developer I certification at the Professional level. Passing it validates your skills against Salesforce standards and proves your qualification to current and future employers. The credential is also connected with related certifications such as Salesforce Certified Platform Developer I, Salesforce Certified Platform App Builder, Salesforce Certified JavaScript Developer I, so it can serve as a solid step in a broader certification path.
The JavaScript-Developer-I日本語 exam has 60 questions in total and must be completed within 105 minutes. That leaves only a narrow time budget per item, so train yourself to flag a difficult question, move on, and circle back later instead of getting stuck. A week or two before your test date, run at least one full timed mock exam in the Actual4Dumps desktop or online test engine under the same 105 minutes limit, and repeat until you can finish with a few minutes left for review.
The passing score for the JavaScript-Developer-I日本語 exam is 65%, and the official registration fee is USD 200 (may vary by region/tax). Keep in mind that a failed attempt is not discounted — retaking the exam means paying the full fee again — so it is wise not to book your seat until your practice scores sit comfortably above the passing mark. Working through the 149 questions at Actual4Dumps in timed mode is a reliable way to judge when you are truly ready.
Salesforce sets the following requirement for the JavaScript-Developer-I日本語 exam: No formal prerequisites, but familiarity with JavaScript and Salesforce platform development is strongly recommended.. Eligibility rules can change from time to time, so always confirm the current prerequisites on the official exam page at https://trailhead.salesforce.com/credentials/javascriptdeveloper1 before you register.
You can register for the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) through the following official channels:
The JavaScript-Developer-I日本語 exam is delivered as Online proctored or onsite testing via Kryterion Webassessor, so review the technical and check-in requirements for that format when you schedule your appointment.
Salesforce recommends the following official training options for the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版):
Official courses build the theory, and pairing them with the 149 practice questions from Actual4Dumps turns that knowledge into exam-ready answers.
Yes. Actual4Dumps offers a free PDF demo for the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版), so you can review real sample questions and judge the quality before paying anything. After your purchase, you receive 365 days of free updates — whenever the question pool changes, you get the latest version at no cost. Once that period expires, you can extend your update service at a 50% discount from your member zone.
If you take the JavaScript-Developer-I日本語 exam within 60 days of your purchase and do not pass, you can apply for a full refund under our 100% Money Back Guarantee. To qualify, submit a scanned copy of your exam enrollment slip together with your official Score Report (PDF) within 2 days after the exam date, and your claim will be processed within 7 days. Note that the guarantee applies only to the corresponding exam: attempts taken within 3 days of purchase, downloaded-but-unused materials, free resources, and expired orders are not eligible, and the candidate name must match the purchaser name. If you would rather not refund, you can exchange the product for two free exam products of equal value while keeping the update service on your original purchase.
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The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) is organized into 5 domains. Among the first ones are Testing and Debugging, Asynchronous JavaScript, Salesforce Platform Integration, and the remaining domains cover the rest of the official objectives. For the complete topic breakdown with every subtopic, see the full JavaScript-Developer-I日本語 exam outline above on this page.
Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) Sample Questions:
Question 1
開発者がインポートするもの：
import printPrice from ' /path/PricePrettyPrint.js ' ;
このインポートが機能するために、printPrice に関してどのような条件を満たす必要がありますか？
A. printPrice は名前付きエクスポートである必要があります
B. printPrice はマルチエクスポートである必要があります
C. printPrice はすべてのエクスポートである必要があります
D. printPrice はデフォルトのエクスポートである必要があります
Question 2
元のコンストラクタ関数:
01 関数 Vehicle(名前、価格) {
02 this.name = name;
03 this.price = price;
04 }
05 Vehicle.prototype.priceInfo = function () {
06 return `$(this.name) の価格は $(this.price)$ です`;
07 }
08 var ford = 新しい車両( ' フォード フィエスタ ' , ' 20,000 ' );
どちらのクラス定義が正しいですか？
A. class Vehicle {
constructor(name, price) {
this.name = name;
this.price = price;
}
priceInfo() {
return `Cost of the ${this.name} is ${this.price}$`;
}
}
B. class Vehicle {
vehicle(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 ${this.price}$`;
}
}
Question 3
Universal Containers社のチームは大規模プロジェクトに取り組んでおり、プロジェクトの依存関係を管理するためにYarnを使用しています。
ある開発者が日付を操作するための依存関係を追加し、その更新をリモートリポジトリにプッシュしました。しかし、チームの他のメンバーは、yarnを実行してもその依存関係がダウンロードされないと不満を述べています。
その理由は一体何だろうか？
A. 開発者は依存関係を追加する際にオプション --save を指定し忘れました。
B. 開発者が依存関係を開発依存関係として追加し、NODE_ENV が production に設定されました。
C. 開発者が依存関係を開発依存関係として追加し、YARN_ENV が production に設定されました。
D. 開発者は依存関係を追加する際にオプション --add を指定し忘れました。
Question 4
以下のコードを参照してください。
const searchText = ' Yay! Salesforce is amazing! ' ;
let result1 = searchText.search(/sales/i);
let result2 = searchText.search(/sales/);
console.log(result1);
console.log(result2);
このコードを実行すると、コンソールにはどのような結果が表示されますか？
A. 5
-1
B. 5
0
C. true
false
D. 5
undefined
Question 5
JavaScript:
01 function Tiger() {
02 this.type = 'Cat';
03 this.size = 'large';
04 }
05
06 let tony = new Tiger();
07 tony.roar = () = > {
08 console.log( ' 彼らは素晴らしい！ ' );
09 };
10
11 function Lion() {
12 this.type = 'Cat';
13 this.size = 'large';
14 }
15
16 let leo = new Lion();
17 // ここにコードを挿入
18 leo.roar();
18行目を有効にするために、17行目に挿入できる2つの文はどれですか？
A. leo.prototype.roar = () = > { console.log( ' 彼らはかなり良い！ ' ); };
B. Object.assign(leo, Tiger);
C. Object.assign(leo, tony);
D. leo.roar = () = > { console.log( ' 彼らはかなり良い！ ' ); };
Solutions:
| Question 1 Answer: D | Question 2 Answer: A | Question 3 Answer: B | Question 4 Answer: A | Question 5 Answer: C,D |
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