Download Salesforce : JavaScript-Developer-I日本語 Questions & Answers as PDF & Test Software
Last Updated: Sep 18, 2026
No. of Questions: 149 Questions & Answers with Testing Engine
Download Limit: Unlimited
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Our Online Test Engine & Self Test Software of TestSimulate JavaScript-Developer-I日本語 actual study materials can simulate the exam scene so that you will have a good command of writing speed and time. Then multiple practices make you perfect while in the real Salesforce JavaScript-Developer-I日本語 exam. The package practice version will not only provide you high-quality JavaScript-Developer-I日本語 exam preparation materials but also various studying ways.
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Salesforce JavaScript-Developer-I日本語 Practice Q&A's
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Walking into the JavaScript-Developer-I日本語 exam without knowing the question style is a risk you do not need to take. TestSimulate's test engines simulate the exam environment, so by exam day in 2026 the 149 practice questions for Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) will feel like familiar ground.
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 Format: | Multiple Choice, Multiple Select |
| Real Exam Qty: | 60 |
| Certificate Validity Period: | 1 year (maintenance required via Salesforce certification maintenance modules) |
| Available Languages: | English |
| Related Certifications: | Salesforce Certified JavaScript Developer I Salesforce Certified Platform Developer I Salesforce Certified Platform App Builder |
| Exam Price: | USD 200 (may vary by region/tax) |
| Exam Duration: | 105 minutes |
| Passing Score: | 65% |
| Recommended Training: | Salesforce Trailhead JavaScript Developer I Prep Salesforce Developer Learning Paths |
| Exam Registration: | Salesforce Certification Registration (Webassessor) Salesforce Credentials Page |
| Sample Questions: | Salesforce JavaScript-Developer-I日本語 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: Browser and DOM Interaction | - Browser APIs (fetch, storage, timers) - DOM manipulation and traversal - Event handling and propagation |
| Topic 2: Asynchronous JavaScript | - Promises and async/await - Error handling in async workflows - Event loop and concurrency model |
| Topic 3: Testing and Debugging | - Unit testing principles - Debugging techniques and tools |
| Topic 4: JavaScript Language Fundamentals | - Functions, scope, and closures - ES6+ syntax and features - Data types, variables, and operators |
| Topic 5: Salesforce Platform Integration | - Calling Apex methods from JavaScript - Security considerations in Salesforce JavaScript - Lightning Web Components (LWC) JavaScript usage |
Common Questions About the Salesforce JavaScript-Developer-I日本語 Exam, Answered
The JavaScript-Developer-I日本語 exam, officially titled Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版), is the qualifying exam for the JavaScript Developer I certification, which sits at the Professional level. Earning it shows employers that you have the skills the credential stands for, and it is a solid step forward on a Salesforce career path. It also connects to Salesforce Certified Platform Developer I, Salesforce Certified Platform App Builder, Salesforce Certified JavaScript Developer I, so the effort you put in now keeps paying off as you advance.
The JavaScript-Developer-I日本語 exam gives you 60 questions to complete within 105 minutes. Do the math before exam day: divide the total time by the question count to set a steady per-question pace, and flag any item that stalls you so you can return to it after securing the easier points. The most reliable way to build that rhythm is a full timed practice test under the same limit, which is exactly what TestSimulate's test engines are designed for.
The passing score for Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) is 65%, and the official registration fee is USD 200 (may vary by region/tax). Keep in mind that a retake means paying that fee again in full, which makes an honest self-check worthwhile: before you book, sit a timed practice test and make sure you are consistently scoring above the passing line with some margin to spare.
According to the official requirements: No formal prerequisites, but familiarity with JavaScript and Salesforce platform development is strongly recommended.. Eligibility rules do change from time to time, so confirm the current details on the official exam page before you register.
Registration for the JavaScript-Developer-I日本語 exam is handled through the official channels below:
The exam is delivered in the following format: Online proctored or onsite testing via Kryterion Webassessor. Pick a date that leaves room for at least one full timed practice test beforehand.
Salesforce recommends the following official training options for candidates preparing for Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版):
Courses build the foundation, but they work best alongside question practice. That is where TestSimulate comes in: the 149 practice questions in our JavaScript-Developer-I日本語 package let you rehearse the exam format at your own pace and see exactly where you stand.
Yes — TestSimulate offers a free PDF demo of the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) material, so you can review the question style and answer quality before you spend anything. After purchase, you also receive 365 days of free updates, and if your product expires you can extend the update service at a 50% discount from your member zone.
If you take the corresponding exam within 60 days of your purchase and do not pass, you are covered by the 100% Money Back Guarantee under clear conditions. To claim a full refund, submit a scan of your exam enrollment slip and your official Score Report PDF within two days of the exam; requests are processed within seven days. Note that sitting the exam within three days of purchase is not eligible, purchases that were never followed by an exam sitting do not qualify, free materials and expired orders are excluded, and the candidate name must match the payer name. Prefer an exchange instead? You can swap your product for two free exam packages of equal value and keep your update service. Delivery is immediate: your JavaScript-Developer-I日本語 material is ready for instant download and is also emailed to you within one minute of payment — contact customer service if nothing arrives within two hours. There is no limit on the number of computers you can install it on.
The current Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) syllabus is organized into 5 exam domains. The first three are:
- Browser and DOM Interaction
- Testing and Debugging
- Asynchronous JavaScript
For the full domain and subtopic breakdown, see the Exam Topics section above — that is the outline your TestSimulate practice questions are mapped to.
Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) Sample Questions:
開発者は、try...catch 文を使用して countSheep() がスローする可能性のあるエラーをキャッチし、それを handleError() 関数に渡したいと考えています。
try...catch の正しい実装方法は何ですか？
- A. setTimeout(function() {
try {
countSheep();
} catch (e) {
handleError(e);
}
}, 1000); - B. try {
countSheep();
} handleError (e){
catch(e);
} - C. try {
setTimeout(function() {
countSheep();
}, 1000);
} catch (e) {
handleError(e);
} - D. try {
countSheep();
} finally {
handleError(e);
}
Correct Answer: A 🗳️
Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).
以下のコードが与えられた場合：
01 setTimeout(() = > {
02 console.log(1);
03 }, 1100);
04 console.log(2);
05 new Promise((resolve, reject) = > {
06 setTimeout(() = > {
07 reject(console.log(3));
08 }, 1000);
09 }).catch(() = > {
10 console.log(4);
11 });
12 console.log(5);
コンソールには何がログ出力されますか？
- A. 12435
- B. 12534
- C. 21435
- D. 25341
Correct Answer: D 🗳️
Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).
コードを参照してください。
const pi = 3.1415926;
円周率πのデータ型は何ですか？
- A. フロート
- B. 10進数
- C. ダブル
- D. 番号
Correct Answer: D 🗳️
Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).
以下のコードが与えられた場合：
01 const delay = async delay = > {
02 return new Promise((resolve, reject) = > {
03 console.log(1);
04 setTimeout(resolve, delay);
05 });
06 };
07
08 const callDelay = async () = > {
09 console.log(2);
10 const yup = await delay(1000);
11 console.log(3);
12 };
13
14 console.log(4);
15 callDelay();
16 console.log(5);
コンソールには何がログ出力されますか？
- A. 4 2 1 5 3
- B. 4 5 1 2 3
- C. 1 4 2 3 5
- D. 4 2 1 5 3
Correct Answer: D 🗳️
Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).
テストでは以下を検索します：
<button class="blue">チェックアウト</button>
しかし、実際のHTMLは次のとおりです。
<ボタン>チェックアウト</ボタン>
テストが失敗するのは、既に存在しないクラスを想定しているためです。
これはどのような種類のテスト結果ですか？
- A. 偽陰性
- B. 真陽性
- C. 真の陰性
- D. 偽陽性
Correct Answer: A 🗳️
Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).
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