Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) : JavaScript-Developer-I日本語

  • Exam Code: JavaScript-Developer-I日本語
  • Exam Name: Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版)
  • Updated: Oct 09, 2026
  • Q & A: 149 Questions and Answers

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About Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) : JavaScript-Developer-I日本語 Exam

PDF for the printer, a Windows engine for the desk, an online engine for everything else. In 2026, TorrentVCE's Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) material for the JavaScript-Developer-I日本語 exam adapts to your preferences, not the reverse.

Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Variables, Types, and Collections23%- Array methods and data manipulation
- JSON parsing and usage
- Truthy and falsy values
- Working with strings, numbers, dates, and booleans
- Type coercion and conversion rules
- Variable declaration and initialization
Topic 2: Testing7%- Unit testing concepts
- Code coverage and best practices
- Testing frameworks and assertions
- Test doubles and mocks
Topic 3: Objects, Functions, and Classes25%- Class syntax, inheritance, and prototypes
- Function definitions, parameters, and scope
- Object creation, properties, and methods
- Decorators and advanced function patterns
- Closures and execution context
- Modules and imports/exports
Topic 4: Asynchronous Programming13%- Async/await syntax
- Promises and chaining
- Event loop and micro/macro tasks
- Fetch API and HTTP requests
- Callbacks and callback hell
Topic 5: Server-Side JavaScript8%- Core Node.js modules
- Module system and require/import
- Command-line tools and scripts
- Node.js fundamentals and runtime
Topic 6: Debugging and Error Handling7%- Console methods and logging
- Debugging tools and breakpoints
- Defensive programming practices
- Error types and exception handling
Topic 7: Browsers and Events17%- Script loading and execution order
- Document Object Model (DOM) manipulation
- Browser APIs and Web Storage
- Window and document object properties
- Event handling, propagation, and delegation

Salesforce JavaScript-Developer-I日本語 Exam — Asked and Answered

Think of the JavaScript-Developer-I日本語 exam as Salesforce asking for proof, not promises: pass it, and you hold the Salesforce Certified JavaScript Developer I certification, a credential at the Intermediate / Developer level. The questions are built to measure applied skill across the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) objectives — the kind employers hire for. It also sits within a broader certification family covering Salesforce Certified Platform Developer I, Salesforce Certified Lightning Web Components Specialist, so one exam's effort keeps paying into the next.

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The blueprint above spans 7 domains — treat its weightings as a budget. A domain worth 17% of the score earns a matching share of your week, while lighter areas like Asynchronous Programming get maintained, not marathoned. Walk the full topic list domain by domain, and let the percentages decide where your practice hours land first.

Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) Sample Questions:

Question #1

コードを参照してください。
01 const event = new CustomEvent(
02 // コードが欠落しています
03 );
04 obj.dispatchEvent(event);
開発者は、recordId に関する情報を送信するために、update というカスタムイベントをディスパッチする必要があります。
2行目に挿入できる2つの選択肢はどれですか?

  • A. '更新'、{ recordId: '123abc' }
  • B. { type: ' update ' , recordId: ' 123abc ' }
  • C. '更新'、'123abc'
  • D. '更新'、{詳細: {レコードID: '123abc'}}
Reveal Solution  Discussion  0

Correct Answer: A,D  🗳️

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Question #2

以下の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. 番号
  • B. 10進数
  • C. 浮動小数点数
  • D. ダブル
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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Question #3

2つの式var1とvar2が与えられたとき、2つの式を連結した結果を文字列型として返すための有効な方法を2つ挙げてください。

  • A. var1.toString() + var2.toString()
  • B. String.concat(var1 + var2)
  • C. var1 + var2
  • D. String(var1).concat(var2)
Reveal Solution  Discussion  0

Correct Answer: A,D  🗳️

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Question #4

以下のコードを参照してください。
01 新しい Promise((resolve, reject) = > {
02 const fraction = Math.random();
03 if (fraction > 0.5) reject( ' fraction > 0.5, ' + fraction);
04 解決(分数);
05 })
06 .then(() = > console.log( ' 解決済み ' ))
07 .catch((error) => console.error(error))
08 .finally(() => console.log('いつ呼び出されますか?'));
8行目のPromise.finallyはいつ呼び出されますか?

  • A. 拒否された場合
  • B. 解決され、確定したとき
  • C. 解決または拒否された場合
  • D. 解決時
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

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Question #5

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. 偽陽性
  • C. 真の陰性
  • D. 真陽性
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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