BONUS！！！ CertShiken JavaScript-Developer-Iダンプの一部を無料でダウンロード：https://drive.google.com/open?id=15r-IdopFgfpPUA8VJwjB91nUjbL9ANUo
IT業の多くの人がいくつか認証試験にパスしたくて、それなりの合格証明書が君に最大な上昇空間を与えます。この競争の激しい業界でとんとん拍子に出世させるのはSalesforceのJavaScript-Developer-I認定試験ですが、簡単にパスではありません。でもたくさんの方法があって、最も少ない時間をエネルギーをかかるのは最高です。
| Section | Weight | Objectives |
|---|---|---|
| Variables, Types, and Collections | 23% | - Primitive and complex data types - JSON parsing and manipulation - Type coercion and conversion - Strings, numbers, and dates - Variable declarations and initialization - Truthy and falsy evaluations - Arrays and collections |
| Asynchronous Programming | 13% | - Promises (creation, chaining, error handling) - Callbacks - Async/Await syntax - Asynchronous patterns for business requirements - Event loop and execution flow |
| Browser and Events | 17% | - Browser Developer Tools usage - Browser-specific APIs - Interacting with forms and user input - DOM manipulation - Event handling and listeners - Event propagation (bubbling and capturing) |
| Testing | 7% | - Writing and modifying unit tests - Unit testing concepts - Test coverage and reliability - Test effectiveness evaluation |
| Objects, Functions, and Classes | 25% | - Higher-order functions - Modules and decorators - Execution flow and context - ES6 classes and inheritance - Prototypal inheritance - Arrow functions - Function declarations and expressions - Object creation and manipulation - Variable scope and closures |
| Debugging and Error Handling | 7% | - Breakpoints and code inspection - Custom error types - Console methods for debugging - Error handling techniques (try/catch/finally) |
| Server Side JavaScript | 8% | - Core Node.js modules - Server-side JavaScript implementations - CLI commands - Node.js fundamentals - Package management (npm) |
>> JavaScript-Developer-I復習資料 <<
あなたはその他のSalesforce JavaScript-Developer-I「Salesforce Certified JavaScript Developer (JS-Dev-101)」認証試験に関するツールサイトでも見るかも知れませんが、弊社はIT業界の中で重要な地位があって、CertShikenの問題集は君に100%で合格させることと君のキャリアに変らせることだけでなく一年間中で無料でサービスを提供することもできます。
質問 # 124
A developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three numbers in the array. The test passes:
01 let res = sum3([1, 2, 3]);
02 console.assert(res === 6);
03
04 res = sum3([1, 2, 3, 4]);
05 console.assert(res === 6);
A different developer made changes to the behavior of sum3 to instead sum all of the numbers present in the array.
Which two results occur when running the test on the updated sum3 function?
正解：C、D
解説：
New behavior: sum3 now returns the sum of all elements .
* Line 01: sum3([1, 2, 3]) # 1 + 2 + 3 = 6
* Assertion on line 02: res === 6 # passes.
* Line 04: sum3([1, 2, 3, 4]) # 1 + 2 + 3 + 4 = 10
* Assertion on line 05: res === 6 # 10 === 6 is false, so the assertion fails.
So:
* Line 02 assertion passes # D.
* Line 05 assertion fails # C.
質問 # 125
Refer to the code below:
What is the value of result when Promise. race executes?
正解：C
質問 # 126
Universal Containers (UC) just launched a new landing page, but users complain that the website is slow. A developer found some functions any that might cause this problem. To verify this, the developer decides to execute everything and log the time each of these three suspicious functions consumes.
Which function can the developer use to obtain the time spent by every one of the three functions?
正解：D
質問 # 127
Considering type coercion, what does the following expression evaluate to?
True + '13' + NaN
正解：A
質問 # 128
Given the code:
01 function GameConsole(name) {
02 this.name = name;
03 }
04
05 GameConsole.prototype.load = function(gamename) {
06 console.log( ' ${this.name} is loading a game: ${gamename}.... ' );
07 }
08
09 function Console16bit(name) {
10 GameConsole.call(this, name);
11 }
12
13 Console16bit.prototype = Object.create(GameConsole.prototype);
14
15 // insert code here
16 console.log( ' ${this.name} is loading a cartridge game: ${gamename}.... ' );
17 }
18
19 const console16bit = new Console16bit( ' SNEGeneziz ' );
20 console16bit.load( ' Super Monic 3x Force ' );
What should a developer insert at line 15?
正解：B
解説：
A subclass created by:
Console16bit.prototype = Object.create(GameConsole.prototype);
inherits all prototype methods from GameConsole, including load.
To override the inherited method, the correct syntax is to assign a new function to the method name on the prototype:
Console16bit.prototype.load = function(gamename) {
console.log(`${this.name} is loading a cartridge game: ${gamename}....`);
};
Why the other options are wrong:
* A assigns something to the constructor function itself, not to the prototype method. Invalid.
* B attempts to call a function in the left-hand side of an assignment; invalid syntax.
* C also uses invalid syntax-prototype methods cannot be defined this way.
* D is the correct definition of a prototype method override.
JavaScript Knowledge References (text-only)
* Methods are overridden by assigning functions to Subclass.prototype.methodName.
* Object.create() establishes prototype inheritance.
* Constructor functions require prototype method attachment using assignment syntax.
質問 # 129
......
すべての働く人は、JavaScript-Developer-Iがこの分野で支配的な人物であり、また彼らのキャリアに役立つことを知っています。 JavaScript-Developer-I信頼性の高い試験ブートキャンプが試験に合格し、資格証明書を取得するのに役立つ場合、より良いキャリア、より良い人生を得ることができます。 私たちの研究JavaScript-Developer-Iガイド資料は、最新のJavaScript-Developer-Iテストの質問と回答のほとんどを網羅しています。 確かにこの分野で何か違うことをしようと決心しているなら、役に立つ認定はあなたのキャリアの足がかりになるでしょう。
JavaScript-Developer-I過去問無料: https://www.certshiken.com/JavaScript-Developer-I-shiken.html
2026年CertShikenの最新JavaScript-Developer-I PDFダンプおよびJavaScript-Developer-I試験エンジンの無料共有：https://drive.google.com/open?id=15r-IdopFgfpPUA8VJwjB91nUjbL9ANUo