Salesforce Developer JavaScript-Developer-I日本語

Walking into the JavaScript-Developer-I日本語 exam unprepared for its pace is a risk you do not need to take. The Getcertkey test engines recreate the pressure of the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) testing environment, so when exam day arrives in 2026, it feels like just another practice session.

Salesforce JavaScript-Developer-I日本語 Exam Overview:

Certification Vendor:	Salesforce
Exam Name:	Salesforce Certified JavaScript Developer I
Exam Number:	JS-Dev-101
Related Certifications:	Salesforce Certified JavaScript Developer I Credential
Certificate Validity Period:	None (Credential does not expire)
Real Exam Qty:	60 (plus up to 5 unscored pilot questions)
Passing Score:	65%
Available Languages:	English
Exam Price:	$200 USD
Exam Format:	Multiple-select, Multiple-choice
Exam Duration:	105 minutes
Sample Questions:
Exam Way:	Online (proctored via Pearson VUE) or On-site (at a Pearson VUE testing center)
Pre Condition:	None required. 1-2 years of JavaScript development experience (front-end and/or back-end) is strongly recommended. Note: To earn the full credential, candidates must also pass the Lightning Web Components Specialist Superbadge in addition to the JS-Dev-101 exam.
Official Syllabus URL:	https://trailhead.salesforce.com/en/credentials/javascriptdeveloperi

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

Common Questions About the Salesforce JavaScript-Developer-I日本語 Exam

What is the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) exam all about?

The JavaScript-Developer-I日本語 exam is the official Salesforce exam behind the Salesforce Developer certification, validating the skills measured by the Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) credential. It sits at the Junior / Associate level of the Salesforce certification program. It also connects to Salesforce Certified JavaScript Developer I Credential, so the knowledge you build here carries over to those tracks as well.

How many questions are on the JavaScript-Developer-I日本語 exam, and how much time do I get?

The JavaScript-Developer-I日本語 exam contains 60 (plus up to 5 unscored pilot questions) questions to be completed within 105 minutes. Before exam day, divide the available time by the question count to work out a comfortable per-question pace, and mark any item that eats into it so you can return later instead of getting stuck. Timed sessions in the Getcertkey test engines make that pacing automatic — run at least two full-length mock exams under the clock so time pressure never becomes the reason you drop points.

What score do I need to pass the JavaScript-Developer-I日本語 exam, and what does it cost?

The passing score for the JavaScript-Developer-I日本語 exam is 65%, and the official registration fee is $200 USD. Retakes are not discounted — every new attempt means paying the full fee again — so it pays to measure yourself before you book. Work through the 149 practice questions on Getcertkey, sit a timed practice test, and schedule your exam only when your scores are consistently comfortable. That simple habit is the cheapest exam strategy there is.

Are there any prerequisites for the JavaScript-Developer-I日本語 exam?

None required. 1-2 years of JavaScript development experience (front-end and/or back-end) is strongly recommended. Note: To earn the full credential, candidates must also pass the Lightning Web Components Specialist Superbadge in addition to the JS-Dev-101 exam. Requirements can change when Salesforce revises its certification program, so confirm the current eligibility rules on the official exam page before you register.

Can I try the JavaScript-Developer-I日本語 practice questions before I buy?

Yes. Getcertkey provides a free JavaScript-Developer-I日本語 PDF demo so you can review the question style and answer quality before purchasing. Every purchase also includes 365 days of free updates — if Salesforce revises the exam during that period, the updated material reaches you at no cost. Once the free-update year ends, you can extend your update service at a 50% discount.

What if I fail the JavaScript-Developer-I日本語 exam, and how is my order delivered?

Every Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) purchase on Getcertkey is covered by a 100% money-back guarantee with clear conditions: if you take the corresponding exam within 60 days of your purchase and do not pass, you can claim a full refund by submitting a scanned copy of your exam enrollment slip and your official score report as a PDF within two days of the exam date; claims are processed within seven days of submission. The guarantee does not apply to exams taken within three days of purchase, to material that was downloaded but never used in an exam attempt, or to free products and expired orders, and the candidate name must match the payer name. If you would rather not take a refund, you can instead exchange your purchase for two free exam preparation products of equal value and keep the update service on your original product.

Delivery is instant: your download is sent to your email within one minute of payment, with no limit on how many computers you may install the material on. If nothing arrives within two hours, check your spam folder and contact customer service for help.

What topics are covered in the JavaScript-Developer-I日本語 exam?

The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) exam blueprint is organized into 7 domains. The first three are:

• Asynchronous Programming — 13% of the exam
• Browser and Events — 17% of the exam
• Server Side JavaScript — 8% of the exam

For the complete domain-by-domain breakdown, scroll up to the full exam topics outline above and use it to plan how you distribute your study time.

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

Question 1

元のコード:
01 let requestPromise = client.getRequest;
03 requestPromise().then((response) = > {
04 handleResponse(response);
05 });
開発者は、PromiseベースのGETリクエストで発生するエラーを適切に処理したいと考えています。
どのコード修正が正しいですか？

A. (Aの複製)
B. エラーにはfinallyハンドラを使用する
C. Promiseチェーンに.catchを追加する
D. requestPromise().then(...) の前後に try/catch ブロックを記述

Question 2

以下のHTMLを参照してください。
< div id= " main " >
< ul >
< li > Leo < /li >
< li > Tony < /li >
< li > Tiger < /li >
< /ul >
< /div >
JavaScriptのどの文で「Leo」が「The Lion」に変更されますか？

A. document.querySelector( ' #main li:second-child ' ).innerHTML = ' The Lion ' ;
B. document.querySelector( ' #main li:nth-child(1) ' ).innerHTML = ' The Lion ' ;
C. document.querySelectorAll( ' #main li,Leo ' ).innerHTML = ' The Lion ' ;
D. document.querySelectorAll( ' #main #Leo ' ).innerHTML = ' The Lion ' ;

Question 3

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 { foo, bar };
B. import { foo, bar } from " ./helpers/utils.js " ;
export { foo, bar };
C. export default class {
foo() { return ' foo ' ; }
bar() { return ' bar ' ; }
}
D. const foo = () = > { return ' foo ' ; };
const bar = () = > { return ' bar ' ; };
export default { foo, bar };

Question 4

以下のコードが与えられた場合：
01 function Person() {
02 this.firstName = ' John ' ;
03 }
04
05 Person.proto = {
06 job: x = > ' Developer '
07 });
08
09 const myFather = new Person();
10 const result = myFather.firstName + ' ' + myFather.job();
10行目が実行されたとき、resultの値は何ですか？

A. ジョン・デベロッパー
B. 未定義の開発者
C. エラー: myFather.job は関数ではありません
D. ジョン未定義

Question 5

開発者は、ニュース記事には本文、著者、閲覧数が必要であるという要件に基づいて、ニュース記事を表すクラスを作成します。コードは以下のとおりです。
01 class Story {
02 // Insert code here
03 this.body = body;
04 this.author = author;
05 this.viewCount = viewCount;
06 }
07 }
3つの属性が正しく設定されたStoryの新しいインスタンスを変数に設定できるようにするには、2行目のプレースホルダーにどのステートメントを挿入すればよいですか？

A. super(body, author, viewCount) {
B. constructor(body, author, viewCount) {
C. function Story(body, author, viewCount) {
D. コンストラクタ() {

Solutions: