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
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If your test date is circled on the calendar and study hours are scarce, the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) practice questions from TestSimulate give you a focused route through the material. Every one of the 149 questions in the JavaScript-Developer-I日本語 package targets what the exam actually measures, so each minute of prep counts.
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 |
| Passing Score: | 65% |
| Related Certifications: | Salesforce Certified Lightning Web Components Specialist Salesforce Certified Platform Developer I |
| Exam Duration: | 105 minutes |
| Exam Format: | Multiple-choice, Multiple-select |
| Real Exam Qty: | 60 scored + up to 5 unscored |
| Available Languages: | Japanese, English |
| Exam Price: | USD 200 (+ applicable taxes) |
| 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: Browsers and Events | 17% | - Window and document object properties - Document Object Model (DOM) manipulation - Script loading and execution order - Event handling, propagation, and delegation - Browser APIs and Web Storage |
| Topic 2: Variables, Types, and Collections | 23% | - Working with strings, numbers, dates, and booleans - Type coercion and conversion rules - JSON parsing and usage - Truthy and falsy values - Array methods and data manipulation - Variable declaration and initialization |
| Topic 3: Asynchronous Programming | 13% | - Promises and chaining - Callbacks and callback hell - Async/await syntax - Fetch API and HTTP requests - Event loop and micro/macro tasks |
| Topic 4: Debugging and Error Handling | 7% | - Console methods and logging - Debugging tools and breakpoints - Error types and exception handling - Defensive programming practices |
| Topic 5: Objects, Functions, and Classes | 25% | - Object creation, properties, and methods - Class syntax, inheritance, and prototypes - Function definitions, parameters, and scope - Decorators and advanced function patterns - Modules and imports/exports - Closures and execution context |
| Topic 6: Server-Side JavaScript | 8% | - Command-line tools and scripts - Node.js fundamentals and runtime - Module system and require/import - Core Node.js modules |
| Topic 7: Testing | 7% | - Code coverage and best practices - Unit testing concepts - Test doubles and mocks - Testing frameworks and assertions |
Common Questions About the Salesforce JavaScript-Developer-I日本語 Exam
The JavaScript-Developer-I日本語 exam is the official Salesforce exam behind Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) — passing it earns you the Salesforce Certified JavaScript Developer I certification, a credential positioned at the Intermediate / Developer level. It is built for candidates who want to validate the skills measured by Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版). Depending on your track, the exam is also linked to the Salesforce Certified Platform Developer I and Salesforce Certified Lightning Web Components Specialist certifications, so one pass can move you toward more than one Salesforce credential.
The JavaScript-Developer-I日本語 exam presents 60 scored + up to 5 unscored questions to be completed within 105 minutes. That pace leaves little room for second-guessing: read each question carefully on the first pass, flag the ones you want to revisit, and keep moving instead of stalling on a single item. Before exam day, run at least one full timed session in the TestSimulate desktop or online test engine with a comparable question load — a steady rhythm under the clock is a trainable skill, and it is often what separates a pass from a near miss.
To pass the JavaScript-Developer-I日本語 exam you need 65%, and the official registration fee is USD 200 (+ applicable taxes). Keep in mind that a failed attempt means paying that fee again in full — retakes are not discounted. Given the cost, self-test before you book: if you can score comfortably above the passing mark on two or three consecutive timed TestSimulate practice tests, your budget is far better spent on the exam itself than on a retake.
No formal prerequisites; 1–2 years of JavaScript development experience recommended Because Salesforce revises its certification programs from time to time, treat this as a starting point rather than the final word. Confirm the current eligibility requirements on the official Salesforce exam page before you register.
Registration for the JavaScript-Developer-I日本語 exam is handled through the official channels below:
Delivery method: Online proctored or onsite at authorized testing centers — pick the option that suits you best when booking your slot.
Salesforce points Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) candidates toward the following official courses:
Official courses build the foundation; pairing them with the 149 JavaScript-Developer-I日本語 practice questions from TestSimulate turns that knowledge into exam-day readiness.
Yes. A free PDF demo of the JavaScript-Developer-I日本語 practice questions is available, so you can check the question style and answer quality before spending anything. Every purchase also includes 365 days of free updates — whenever Salesforce adjusts the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) blueprint, your material is refreshed at no cost during that period. After the first year, you can extend the update service at a 50% discount from your member zone.
TestSimulate backs your purchase with a 100% Money Back Guarantee. If you take the corresponding exam within 60 days of purchase and do not pass, you can claim a full refund by submitting a scanned copy of your exam enrollment slip together with the official Score Report PDF within 2 days of your exam date; approved claims are processed within 7 days. The guarantee applies only to the exam matching your purchase, the candidate name must match the payer name, and it does not cover attempts taken within 3 days of purchase, candidates who downloaded the material but never sat the exam, expired orders, or free materials. If you would rather keep preparing, you can exchange the product for two free exam preparation packages of equal value and keep the update service on your original purchase.
Delivery is instant: your download is available right after payment, and a copy is emailed to you within one minute. If nothing arrives within 2 hours, check your spam folder and contact our support team. There is no limit on the number of computers you can install the software on.
The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) syllabus is organized into 7 domains. Among the headline areas are Testing (7%), Asynchronous Programming (13%), Server-Side JavaScript (8%). Rather than copying every subtopic here, we keep the complete, current outline in the Exam Topics section above — work through it domain by domain with the TestSimulate JavaScript-Developer-I日本語 practice questions so nothing on the blueprint catches you off guard.
Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) Sample Questions:
utils.jsの実装のうち、fooとbarをサポートするものはどれですか？
- A. const foo = () = > { return ' foo ' ; };
const bar = () = > { return ' bar ' ; };
export default { foo, bar }; - B. export default class {
foo() { return ' foo ' ; }
bar() { return ' bar ' ; }
} - C. import { foo, bar } from " ./helpers/utils.js " ;
export { foo, bar }; - D. const foo = () = > { return ' foo ' ; };
const bar = () = > { return ' bar ' ; };
export { foo, bar };
Correct Answer: C,D 🗳️
Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).
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. console.error(number + 2 === 0);
- B. console.assert(number + 2 === 0);
- C. console.classy(number + 2 === 0);
- D. assert(number + 2 === 0);
Correct Answer: B 🗳️
Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).
01 function Monster() { this.name = ' hello ' ; };
02 const m = Monster();
新しいキーワードが欠落している場合、何が起こりますか？
- A. m変数には正しいオブジェクトが割り当てられています。
- B. window.name には 'hello' が割り当てられ、変数 m は未定義のままです。
- C. window.m に正しいオブジェクトが割り当てられました。
- D. m変数には正しいオブジェクトが割り当てられていますが、this.nameは未定義のままです。
Correct Answer: B 🗳️
Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).
修正されたコード:
function Person() {
this.firstName = "ジョン";
}
Person.prototype = {
職種: x => "開発者"
};
const myFather = new Person();
const result = myFather.firstName + " " + myFather.job();
10行目が実行された後、resultの値は何ですか？
- A. "未定義の開発者"
- B. "ジョン未定義"
- C. エラー: myFather.job は関数ではありません
- D. "ジョン・デベロッパー"
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。
01 let car1 = new Promise((_, reject) = >
02 setTimeout(reject, 2000, " Car 1 crashed in " ));
03 let car2 = new Promise(resolve = >
04 setTimeout(resolve, 1500, " Car 2 completed " ));
05 let car3 = new Promise(resolve = >
06 setTimeout(resolve, 3000, " Car 3 completed " ));
07
08 Promise.race([car1, car2, car3])
09 .then(value = > {
10 let result = ' $(value) the race. ' ;
11 })
12 .catch(err = > {
13 console.log( " Race is cancelled. " , err);
14 });
Promise.raceが実行されたとき、resultの値は何ですか？
- A. レース中に1号車がクラッシュしました。
- 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. 3号車はレースを完走しました。
Correct Answer: B 🗳️
Explanation: Only visible for TestSimulate members. You can sign-up / login (it's free).
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