Office workers don't lack ambition; they lack hours. The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) material from ValidVCE fits preparation into a busy schedule — 149 practice questions for the JavaScript-Developer-I日本語 exam, efficient by design.
Salesforce JavaScript-Developer-I日本語 Exam Overview:
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I |
| Exam Number: | JS-Dev-101 |
| Available Languages: | English |
| Related Certifications: | Salesforce Certified JavaScript Developer I Credential |
| Passing Score: | 65% |
| Real Exam Qty: | 60 (plus up to 5 unscored pilot questions) |
| Exam Duration: | 105 minutes |
| Exam Price: | $200 USD |
| Certificate Validity Period: | None (Credential does not expire) |
| Exam Format: | Multiple-choice, Multiple-select |
| 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:
| Section | Weight | Objectives |
|---|---|---|
| Objects, Functions, and Classes | 25% | - Execution flow and context - Variable scope and closures - Prototypal inheritance - Object creation and manipulation - Higher-order functions - Arrow functions - ES6 classes and inheritance - Modules and decorators - Function declarations and expressions |
| Server Side JavaScript | 8% | - Node.js fundamentals - CLI commands - Server-side JavaScript implementations - Core Node.js modules - Package management (npm) |
| Testing | 7% | - Test coverage and reliability - Unit testing concepts - Writing and modifying unit tests - Test effectiveness evaluation |
| Variables, Types, and Collections | 23% | - Primitive and complex data types - Variable declarations and initialization - Arrays and collections - JSON parsing and manipulation - Type coercion and conversion - Truthy and falsy evaluations - Strings, numbers, and dates |
| Debugging and Error Handling | 7% | - Breakpoints and code inspection - Console methods for debugging - Error handling techniques (try/catch/finally) - Custom error types |
| Browser and Events | 17% | - Browser-specific APIs - DOM manipulation - Browser Developer Tools usage - Interacting with forms and user input - Event propagation (bubbling and capturing) - Event handling and listeners |
| Asynchronous Programming | 13% | - Callbacks - Event loop and execution flow - Promises (creation, chaining, error handling) - Asynchronous patterns for business requirements - Async/Await syntax |
Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) Exam FAQ — Reliable Answers
Yes — download the free Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) demo and inspect the material before buying. Purchases include the right of free updating for 365 days, with latest versions emailed promptly upon release; renew afterward at 50% off.
$200 USD per attempt, 65% to pass. For busy professionals, one prepared attempt beats two rushed ones — work through the 149 practice questions for the JavaScript-Developer-I日本語 exam at ValidVCE first.
The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) blueprint covers 7 domains — including Debugging and Error Handling (7%), Asynchronous Programming (13%), Objects, Functions, and Classes (25%). Budget your limited hours by weighting; the complete outline above lists every subtopic.
The Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) is Salesforce's certification exam for Salesforce Developer, at the Junior / Associate level. It's among the most authoritative credentials in the field — for those aiming at Salesforce careers, it's the first step. Related credentials include Salesforce Certified JavaScript Developer I Credential.
Files arrive by automatic email within a minute of payment — unlimited devices, and 24/7 customer assisting if nothing shows up within 2 hours (check spam). Need an invoice? Email us your company name for a custom invoice made to your demand. If you fail the corresponding JavaScript-Developer-I日本語 exam within 60 days of purchase, we process a full refund within 7 days — send a scanned enrollment slip plus the official Score Report PDF within 2 days of the exam. Excluded: exams within 3 days of purchase, candidate names that don't match the payer, and free or expired products. Alternatively, exchange for two equal-value products free.
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. Vendors update eligibility rules over time, so verify the current requirements on the official page (official JavaScript-Developer-I日本語 exam page) before registering.
105 minutes for 60 (plus up to 5 unscored pilot questions) questions. Time-pressed candidates should rehearse the clock: short timed sets on busy days, full simulations on free ones.
Salesforce Certified JavaScript Developer I Exam (JavaScript-Developer-I日本語版) Sample Questions:
以下のコードブロックを参照してください(バッククォートを使用してテンプレートリテラルを修正しました)。
01 class Animal {
02 constructor(name) {
03 this.name = name;
04 }
05
06 makeSound() {
07 console.log(`${this.name} is making a sound.`);
08 }
09 }
10
11 class Dog extends Animal {
12 constructor(name) {
13 super(name);
14 this.name = name;
15 }
16 makeSound() {
17 console.log(`${this.name} is barking.`);
18 }
19 }
20
21 let myDog = new Dog( ' Puppy ' );
22 myDog.makeSound();
コンソール出力は何ですか？
- A. > Uncaught ReferenceError
- B. > Undefined
- C. > Puppy is barking.
Correct Answer: C 🗳️
Explanation: Only visible for ValidVCE members. You can sign-up / login (it's free).
以下のコードを参照してください。
01 let sayHello = () = > {
02 console.log( ' Hello, World! ' );
03 };
今から2分後にsayHelloを1回実行するコードはどれですか？
- A. setTimeout(sayHello(), 120000);
- B. delay(sayHello, 120000);
- C. setInterval(sayHello, 120000);
- D. setTimeout(sayHello, 120000);
Correct Answer: D 🗳️
Explanation: Only visible for ValidVCE members. You can sign-up / login (it's free).
以下のコードを参照してください。
01 const myFunction = arr = > {
02 return arr.reduce((result, current) = > {
03 結果 + 現在の値を返す;
04 }, 10);
05 }
空の配列を引数としてこの関数を呼び出した場合、どのような出力が得られますか？
- A. 0 を返します
- B. エラーをスローします
- C. 5 を返します # (ここにあるテキストはタイプミスと思われます。正しい値は 10 です。説明を参照してください。)
- D. NaN を返します
Correct Answer: C 🗳️
Explanation: Only visible for ValidVCE members. You can sign-up / login (it's free).
開発者が、後方互換性を損なわない新機能を追加したパッケージの新バージョンを公開しました。以前のバージョン番号は1.1.3でした。
セマンティックバージョニングの形式に従うと、新しいパッケージのバージョン番号は何になるべきでしょうか？
- A. 1.1.4
- B. 1.2.0
- C. 1.2.3
- D. 2.0.0
Correct Answer: B 🗳️
Explanation: Only visible for ValidVCE members. You can sign-up / login (it's free).
let sampleText = "素早い茶色のキツネがジャンプする";
部分文字列に対して真を返す式はどれですか？(３つ選択)
- A. sampleText.includes( ' fox ' );
- B. sampleText.indexOf( ' fox ' ) !== -1;
- C. sampleText.indexOf( ' Quick ' ) !== -1;
- D. sampleText.include( ' fox ' ) !== -1;
- E. sampleText.indexOf( ' quick ' ) > -1;
Correct Answer: A,B,E 🗳️
Explanation: Only visible for ValidVCE members. You can sign-up / login (it's free).
