Try and practice the latest Salesforce : JavaScript-Developer-I日本語 real questions & answers
Last Updated: Sep 09, 2026
No. of Questions: 149 Questions & Answers with Testing Engine
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The JavaScript-Developer-I日本語 exam is known for tripping up candidates who only read the official guide. Working through the 149 practice questions from Actual4Cert trains you to handle the wording, the pacing, and the pressure of the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) long before test day.
Salesforce JavaScript-Developer-I日本語 Exam Overview:
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I |
| Exam Number: | JS-Dev-001 |
| Passing Score: | 65% |
| Certificate Validity Period: | 1 year (maintenance required via Salesforce certification maintenance modules) |
| Exam Price: | USD 200 (may vary by region/tax) |
| Real Exam Qty: | 60 |
| Related Certifications: | Salesforce Certified Platform App Builder Salesforce Certified Platform Developer I Salesforce Certified JavaScript Developer I |
| Exam Format: | Multiple Select, Multiple Choice |
| Available Languages: | English |
| Exam Duration: | 105 minutes |
| Recommended Training: | Salesforce Developer Learning Paths Salesforce Trailhead JavaScript Developer I Prep |
| Exam Registration: | Salesforce Certification Registration (Webassessor) Salesforce Credentials Page |
| Sample Questions: | DOWNLOAD DEMO |
| 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: Testing and Debugging | - Unit testing principles - Debugging techniques and tools |
| Topic 2: Salesforce Platform Integration | - Security considerations in Salesforce JavaScript - Calling Apex methods from JavaScript - Lightning Web Components (LWC) JavaScript usage |
| Topic 3: Asynchronous JavaScript | - Event loop and concurrency model - Promises and async/await - Error handling in async workflows |
| Topic 4: JavaScript Language Fundamentals | - ES6+ syntax and features - Functions, scope, and closures - Data types, variables, and operators |
| Topic 5: Browser and DOM Interaction | - Event handling and propagation - DOM manipulation and traversal - Browser APIs (fetch, storage, timers) |
Common Questions About the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) exam is the official Salesforce assessment behind the JavaScript Developer I credential, which sits at the Professional level. Passing it confirms that your skills meet the vendor's current requirements rather than a textbook outline. It also connects with related certifications such as Salesforce Certified Platform Developer I, Salesforce Certified Platform App Builder, Salesforce Certified JavaScript Developer I, so it can anchor a broader certification path.
According to the official exam information, the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) exam includes 60 questions and gives you 105 minutes to complete them. Treat that as a pacing exercise, not just a knowledge check: bank the questions you know first, flag the ones that stall you, and circle back instead of burning minutes on a single item. Before test day, run at least one full timed session in the Actual4Cert desktop or online test engine, so the clock never feels unfamiliar when it counts.
To pass the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) exam you need 65%, and the official registration fee is USD 200 (may vary by region/tax). Keep one thing in mind: a failed attempt is not discounted, so retaking the exam means paying USD 200 (may vary by region/tax) again in full. A practical safeguard is to sit a complete Actual4Cert practice test a week or two before your exam date; if your timed scores are not sitting comfortably above the passing mark, consider pushing your booking back and drilling the weak domains first.
The official prerequisites for the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) exam are as follows: No formal prerequisites, but familiarity with JavaScript and Salesforce platform development is strongly recommended.. Requirements can change over time, so confirm the details on the official Salesforce exam page at https://trailhead.salesforce.com/credentials/javascriptdeveloper1 before you book your seat.
You can register through the official channels listed below:
Exam delivery: Online proctored or onsite testing via Kryterion Webassessor.
Salesforce points candidates toward the following official training options:
Official training builds the theory; the 149 practice questions from Actual4Cert show you how that theory appears in exam-style items, which is where most study plans actually pay off.
Yes. A free PDF demo of the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) practice questions is available on the Actual4Cert samples page, so you can check the question style and difficulty before spending anything. Every purchase also includes 365 days of free updates, and if your product expires after that period, you can extend the update service from your member zone at 50% off.
If you take the JavaScript-Developer-I日本語 exam within 60 days of your purchase and do not pass, Actual4Cert offers a 100% money-back guarantee: send a scanned copy of your exam enrollment slip together with the official Score Report PDF within two days of your exam date, and the refund is processed within seven days. The candidate name must match the payer name, and the guarantee does not apply to exams taken within three days of purchase, to material that was downloaded without the exam actually being taken, or to free materials and expired orders. Prefer to keep studying instead? You can exchange your purchase for two additional exam products of equal value, free of charge, while keeping the update service on your original product. Delivery itself is instant: the download link is emailed within one minute of payment, and if nothing arrives within two hours, our support team will sort it out. There is no limit on how many computers you install the material on.
The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) syllabus is organized into 5 domains. The leading areas include Asynchronous JavaScript, Browser and DOM Interaction, and Salesforce Platform Integration. For the complete, topic-by-topic breakdown, scroll up to the Exam Topics section above.
Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) Sample Questions:
for (let number = 2; number <= 5; number += 1) {
// ここに高速コードステートメントを記述
}
ブール式が偽と評価された場合にエラーをログに記録するという要件を満たすのは、どのステートメントですか？
- A. assert(number + 2 === 0);
- B. console.assert(number + 2 === 0);
- C. console.classy(number + 2 === 0);
- D. console.error(number + 2 === 0);
Explanation: Only visible for Actual4Cert members. You can sign-up / login (it's free).
JavaScriptブラウザコンソールを使用して実行できる操作は何ですか？
- A. ページのDOMとJavaScriptコードを変更します
- B. ページのDOMを表示および変更する
- C. セキュリティクッキーの表示と変更
- D. ページに関係のないコードを実行する
- E. ページのパフォーマンスを示すレポートを表示する
Explanation: Only visible for Actual4Cert members. You can sign-up / login (it's free).
通常の関数定義と比較して、太い矢印関数にはどのような2つの特徴がありますか？
- A. 関数本体に単一の式がある場合、その式が評価され、暗黙的に返されます。
- B. この関数は、囲んでいるスコープの this を使用します。
- C. この関数は独自の this を生成するため、スコープを分離するのに役立ちます。
- D. この関数は parentThis という引数を受け取り、囲んでいる字句スコープを指定します。
Explanation: Only visible for Actual4Cert members. You can sign-up / login (it's free).
開発者がJavaScriptオブジェクトをコピーしました。
01 function Person() {
02 this.firstName = " John " ;
03 this.lastName = " Doe " ;
04 this.name = () = > `${this.firstName},${this.lastName}`;
05 }
06
07 const john = new Person();
08 const dan = Object.assign({}, john);
09 dan.firstName = ' Dan ' ;
開発者はどのようにしてダンの名(firstName)と姓(lastName)にアクセスするのですか？
- A. dan.name()
- B. dan.firstName() + dan.lastName()
- C. dan.name
- D. dan.firstName + dan.lastName
Explanation: Only visible for Actual4Cert members. You can sign-up / login (it's free).
以下のコードが与えられた場合：
01 function Person(name, email) {
02 this.name = name;
03 this.email = email;
04 }
05
06 const john = new Person( ' John ' , ' [email protected] ' );
07 const jane = new Person( ' Jane ' , ' [email protected] ' );
08 const emily = new Person( ' Emily ' , ' [email protected] ' );
09
10 let usersList = [john, jane, emily];
ユーザーリストを視覚的に表示し、名前またはメールアドレス属性で並べ替えを可能にするには、どの方法が使用できますか？
- A. console.group(usersList);
- B. console.info(usersList);
- C. console.groupCollapsed(usersList);
- D. console.table(usersList);
Explanation: Only visible for Actual4Cert members. You can sign-up / login (it's free).
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