Passing exam with JavaScript-Developer-I日本語 latest training materials
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Last Updated: Oct 30, 2026
No. of Questions: 149 Questions & Answers with Testing Engine
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How to Prepare for Salesforce JavaScript Developer I Exam
Preparation Guide for Salesforce JavaScript Developer I Exam
Introduction
Salesforce is a solution for managing customer relationships that unite customers and companies. This is an interactive CRM platform that provides a single, shared view of every client in all the divisions including marketing, distribution, exchange, and operation. Provide the clients with the individual experience Salesforce demand 360 product via the Integrated CRM Platform. It delivers solid and related goods to boost marketing, revenue, exchange, operation, IT, and more. Salesforce is a digital cloud computing (SaaS) firm specializing in the management of client relationships (CRMs). There was a mistake. The app is now the number one of consumer satisfaction and allows organizations to track customer behavior, advertise to consumers, and more. Salesforce is common because it is bundled with features such as contact management, workflow development, task management, incentive monitoring, teamwork tools, customer experience tools, analytics, and interactive, smartphone dashboard.
How much Salesforce JavaScript-Developer-I Exam Cost
The price of the Salesforce JavaScript Developer I certification is $200 USD, for more information related to the Salesforce JavaScript-Developer-I Exam please visit Salesforce website.
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How to Study the Salesforce JavaScript-Developer-I Exam
The best study material one can get is the JavaScript-Developer-I practice exam dumps. To ensure good grades, do attempt the JavaScript-Developer-I practice exams. The JavaScript Developer I from Salesforce typically has 1-2 years of experience as a JavaScript developer with the following JavaScript topics.
Modules
Forms of data and operators
Control of Mistake
Objects & Arrays: Data Structures
Monitor (agnostic platform)
Conversion type (inclusive versus explicit)
Discharge
Classes
Strings
Asynchronous Programming
Item Model Document
Functions (more functions in higher order)
Scope of Variables
Activities
JavaScript on the backend
To prepare for this test, we advise a combination of practical experience, completion of training courses, pathways and self-study in the areas listed in the examination outline section of this examination guide.
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Salesforce Platform Integration | - Calling Apex methods from JavaScript - Security considerations in Salesforce JavaScript - Lightning Web Components (LWC) JavaScript usage |
| Topic 2: Testing and Debugging | - Debugging techniques and tools - Unit testing principles |
| Topic 3: JavaScript Language Fundamentals | - Functions, scope, and closures - ES6+ syntax and features - Data types, variables, and operators |
| Topic 4: Asynchronous JavaScript | - Promises and async/await - Event loop and concurrency model - Error handling in async workflows |
| Topic 5: Browser and DOM Interaction | - Event handling and propagation - Browser APIs (fetch, storage, timers) - DOM manipulation and traversal |
Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) Sample Questions:
コードを参照してください。
01 console.log( ' Start ' );
02 Promise.resolve( ' Success ' ).then(function(value) {
03 console.log( ' Success ' );
04 });
05 console.log( ' End ' );
コードが正常に実行された後の出力は何ですか？
- A. Start
End
Success - B. Success
Start
End - C. End
Start
Success - D. Start
Success
End
Correct Answer: A 🗳️
Explanation: Only visible for TrainingQuiz members. You can sign-up / login (it's free).
ある開発者が、チームがこれから作成するバックエンドサーバーにNode.jsを使用することでメリットが得られることを経営陣に説得しようとしている。このサーバーは、チームが既にHTML、CSS、JavaScriptを使って構築済みのウェブサイトからのAPIリクエストを処理するウェブサーバーとなる予定だ。
開発者が上司を説得するために使えるNode.jsの3つの利点は何ですか？
- A. 独自のパッケージマネージャを使用してインストールし、サードパーティライブラリをインストールおよび管理します。
- B. 新しい言語を学習する必要がないように、サーバー側の JavaScript コードを実行します。
- C. 実行前にコードの静的解析を行い、実行時エラーを検出します。
- D. パフォーマンスの高いリクエスト処理のために、ノンブロッキング機能を使用します。
- E. 数年に一度のメジャーリリースで安定性を確保します。
Correct Answer: A,B,D 🗳️
Explanation: Only visible for TrainingQuiz members. You can sign-up / login (it's free).
テスト対象関数:
01 const sum3 = (arr) = > {
02 if (!arr.length) return 0;
03 if (arr.length === 1) return arr[0];
04 if (arr.length === 2) return arr[0] + arr[1] ;
05 return arr[0] + arr[1] + arr[2];
06 };
この関数に対する有効なテストとなるassert文はどれですか？(2つ選択)
- A. console.assert(sum3([-3, 2]) === -1);
- B. console.assert(sum3([1, ' 2 ' ]) == 12);
- C. console.assert(sum3([0]) === 0);
- D. console.assert(sum3([ ' hello ' , 2, 3, 4]) === NaN);
Correct Answer: A,C 🗳️
Explanation: Only visible for TrainingQuiz members. You can sign-up / login (it's free).
以下のコードを参照してください(Promise.race を使用することを前提としています)。
let cat3 = new Promise(resolve = >
setTimeout(resolve, 3000, "Cat 3 完了")
);
Promise.race([cat1, cat2, cat3])
.then(value = > {
let result = `${value} レース結果。`;
})
.catch(err = > {
console.log("レースがキャンセルされました: ", err);
});
(cat1とcat2は以前の例と同様で、cat2が最も早く解決されると仮定します。)Promise.raceが実行されたとき、resultの値は何ですか？
- A. 3号車はレースを完走しました。
- B. 2号車はレースを完走しました。
- C. レースは中止されました。
- D. レース中に1号車がクラッシュしました。
Correct Answer: B 🗳️
Explanation: Only visible for TrainingQuiz members. You can sign-up / login (it's free).
開発者は、数値を渡すと次の値を返す FizzBuzz 関数を作成しました。
* 数字が3で割り切れる場合は「fizz」と表示されます。
* 数字が5で割り切れる場合は「ブザー」を鳴らします。
* 数字が3と5の両方で割り切れる場合は「fizzbuzz」と表示されます。
* 数値が3でも5でも割り切れない場合は、空の文字列を返します。
fizzbuzz関数のシナリオを適切にテストするテストケースはどれですか？(2つ選択)
- A. let res = fizzbuzz(Infinity);
console.assert(res === ' ' ); - B. let res = fizzbuzz(NaN);
console.assert(isNaN(res)); - C. let res = fizzbuzz(15);
console.assert(res === ' fizzbuzz ' ); - D. let res = fizzbuzz(3);
console.assert(res === ' buzz ' );
Correct Answer: A,C 🗳️
Explanation: Only visible for TrainingQuiz members. You can sign-up / login (it's free).
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