JavaScript-Developer-I日本語 actual exam practice material help you to clear JavaScript-Developer-I日本語 test. If you want get professional and Salesforce real practice, recommend you to use our JavaScript-Developer-I日本語 actual test practice material latest version.
Salesforce JavaScript-Developer-I日本語 Actual Tests : Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
About Best Salesforce JavaScript-Developer-I日本語 Exam Practice Material
The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) exam has a reputation for tripping up even experienced professionals. Actual4test built its JavaScript-Developer-I日本語 practice test around 149 expert-verified questions so you can walk in knowing what to expect.
Salesforce JavaScript-Developer-I日本語 Exam Overview:
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I Exam |
| Exam Number: | JS-Dev-101 / JavaScript-Developer-I |
| Available Languages: | Japanese, English |
| Passing Score: | 65% |
| Real Exam Qty: | 60 scored + up to 5 unscored |
| Exam Price: | USD 200 (+ applicable taxes) |
| Related Certifications: | Salesforce Certified Lightning Web Components Specialist Salesforce Certified Platform Developer I |
| Exam Format: | Multiple-select, Multiple-choice |
| Exam Duration: | 105 minutes |
| Certificate Validity Period: | No expiration; requires regular maintenance via Trailhead modules |
| Recommended Training: | Salesforce JavaScript Developer I Certification Prep |
| Exam Registration: | Salesforce Certification Registration |
| Sample Questions: | Salesforce JavaScript-Developer-I日本語 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 |
Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Variables, Types, and Collections | 23% | - Truthy and falsy values - Working with strings, numbers, dates, and booleans - JSON parsing and usage - Type coercion and conversion rules - Variable declaration and initialization - Array methods and data manipulation |
| Topic 2: Debugging and Error Handling | 7% | - Error types and exception handling - Console methods and logging - Defensive programming practices - Debugging tools and breakpoints |
| Topic 3: Browsers and Events | 17% | - Window and document object properties - Document Object Model (DOM) manipulation - Event handling, propagation, and delegation - Browser APIs and Web Storage - Script loading and execution order |
| Topic 4: Server-Side JavaScript | 8% | - Command-line tools and scripts - Core Node.js modules - Module system and require/import - Node.js fundamentals and runtime |
| Topic 5: Asynchronous Programming | 13% | - Callbacks and callback hell - Promises and chaining - Event loop and micro/macro tasks - Fetch API and HTTP requests - Async/await syntax |
| Topic 6: Objects, Functions, and Classes | 25% | - Decorators and advanced function patterns - Modules and imports/exports - Object creation, properties, and methods - Function definitions, parameters, and scope - Class syntax, inheritance, and prototypes - Closures and execution context |
| Topic 7: Testing | 7% | - Unit testing concepts - Testing frameworks and assertions - Code coverage and best practices - Test doubles and mocks |
Common Questions Candidates Ask About JavaScript-Developer-I日本語
The JavaScript-Developer-I日本語 exam (Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)) is the official Salesforce exam that leads to the Salesforce Certified JavaScript Developer I certification, a credential at the Intermediate / Developer level. Related certifications include Salesforce Certified Platform Developer I, Salesforce Certified Lightning Web Components Specialist. Actual4test provides 149 practice questions to help you prepare for it with confidence.
The JavaScript-Developer-I日本語 exam contains 60 scored + up to 5 unscored questions and gives you 105 minutes to finish them. Before exam day, divide the total time by the question count so you know the pace you need to keep, and flag difficult items instead of getting stuck on them. Running at least one full timed session in the Actual4test test engine is the best way to make that time pressure feel familiar.
You need 65% to pass, and the official registration fee is USD 200 (+ applicable taxes). Keep in mind that a failed attempt means paying that fee in full again, so it pays to test yourself first. When your scores on the Actual4test timed practice tests stay consistently above the passing line, you are ready to book the exam.
No formal prerequisites; 1–2 years of JavaScript development experience recommended Requirements can change over time, so always double-check the latest eligibility rules before you register on the official Salesforce exam page.
You can book your exam through the official registration channels:
The exam is delivered in the following way: Online proctored or onsite at authorized testing centers.
Salesforce recommends the following training options for this exam:
Official courses build the foundation, and the 149 JavaScript-Developer-I日本語 practice questions from Actual4test help you turn that knowledge into exam-day performance.
Yes. Actual4test offers a free JavaScript-Developer-I日本語 PDF demo so you can check the quality of the practice questions before purchasing. After you buy, your product comes with 365 days of free updates, and if it expires you can renew the update service at a 50% discount from your member zone.
Your purchase is protected by our 100% Money Back Guarantee. If you take the corresponding JavaScript-Developer-I日本語 exam within 60 days of purchase and do not pass, send us a scan of your enrollment slip and the official Score Report PDF within two days of the exam, and the full refund will be processed within seven days. The candidate name must match the payer name; exams taken within three days of purchase, free materials, and expired orders are not eligible. If you would rather not refund, you can exchange your product for two free products of equal value and keep the update service on your original purchase. Delivery itself is instant: your material is available for download and is emailed to you within one minute of payment. If nothing arrives within two hours, contact our support team. There is no limit on how many computers you may install it on.
The JavaScript-Developer-I日本語 syllabus is organized into 7 exam domains. Among the first three are Server-Side JavaScript (8%), Variables, Types, and Collections (23%), Debugging and Error Handling (7%). For the complete breakdown of topics and subtopics, see the Exam Topics section above.
Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) Sample Questions:
開発者は、新しいWebフレームワーク/ライブラリ(Minimalist.js)ではなく、成熟していてサポート体制が整っているWebフレームワーク/ライブラリを推奨したいと考えている。
どちらの2つをおすすめすべきでしょうか？
- A. React
- B. Express
- C. Vue
- D. Koa
Explanation: Only visible for Actual4test members. You can sign-up / login (it's free).
以下のコードを参照してください。
< html lang= " en " >
< body >
< button class= " secondary " > Save draft < /button >
< button class= " primary " > Save and close < /button >
< /body >
< script >
function displaySaveMessage(event) {
console.log( ' Save message. ' );
}
function displaySuccessMessage(event) {
console.log( ' Success message. ' );
}
window.onload = function() {
document.querySelector( ' .secondary ' )
.addEventListener( ' click ' , displaySaveMessage, true);
document.querySelector( ' .primary ' )
.addEventListener( ' click ' , displaySuccessMessage, true);
}
< /script >
< /html >
- A. > 内部メッセージ
外部メッセージ - B. > 外部メッセージ
- C. > 外部メッセージ
内なるメッセージ - D. > 内部メッセージ
Explanation: Only visible for Actual4test members. You can sign-up / login (it's free).
以下のコードブロックを参照してください。
01 let array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11];
02 let output = 0;
03
04 for (let num of array) {
05 if (output > 10) {
06 break;
07 }
08 if (num % 2 == 0) {
09 continue;
10 }
11 output += num;
12 }
コード実行後の出力値は何ですか？
- A. 11
- B. 25
- C. 16
- D. 36
Explanation: Only visible for Actual4test members. You can sign-up / login (it's free).
開発者がボタン付きのシンプルなウェブページを作成しています。ユーザーがこのボタンを初めてクリックすると、メッセージが表示されます。
開発者は以下のJavaScriptコードを記述しましたが、何かが欠けています。メッセージが初回クリック時だけでなく、ユーザーがボタンをクリックするたびに表示されてしまいます。
01 function listen(event) {
02
03 alert( 'やあ！僕はジョン・ドゥだよ' );
04
05 }
06 button.addEventListener('click', listen);
どの2行のコード行が、このコードを要求どおりに動作させるのでしょうか？
- A. 4行目でevent.stopPropagation()を使用してください。
- B. 4行目で button.removeEventListener( ' click ' , listen); を使用してください。
- C. 2行目で、event.firstを使用して、最初の実行かどうかをテストします。
- D. 6行目に、button.addEventListener()にonceというオプションを追加します。
Explanation: Only visible for Actual4test members. You can sign-up / login (it's free).
開発者は、引数としてptsを1つ取るisDeg関数を持っています。この関数を1分ごとに実行するようにスケジュールしたいと考えています。
この関数をスケジュールするための正しい構文は何ですか？
- A. setTimeout(isDeg, 60000, ' cat ' );
- B. setTimeout(isDeg( ' cat ' ), 60000);
- C. setInterval(isDeg( ' cat ' ), 60000);
- D. setInterval(isDeg, 60000, ' cat ' );
Explanation: Only visible for Actual4test members. You can sign-up / login (it's free).
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