信頼できる-ハイパスレートのJavaScript-Developer-I問題サンプル試験-試験の準備方法JavaScript-Developer-I日本語対策問題集

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Weight	Objectives
Browser and Events	17%	- Browser-specific APIs - Interacting with forms and user input - Browser Developer Tools usage - Event handling and listeners - DOM manipulation - Event propagation (bubbling and capturing)
Objects, Functions, and Classes	25%	- Function declarations and expressions - Object creation and manipulation - ES6 classes and inheritance - Variable scope and closures - Arrow functions - Prototypal inheritance - Higher-order functions - Execution flow and context - Modules and decorators
Debugging and Error Handling	7%	- Breakpoints and code inspection - Error handling techniques (try/catch/finally) - Console methods for debugging - Custom error types
Server Side JavaScript	8%	- Server-side JavaScript implementations - Core Node.js modules - Node.js fundamentals - CLI commands - Package management (npm)
Asynchronous Programming	13%	- Asynchronous patterns for business requirements - Promises (creation, chaining, error handling) - Event loop and execution flow - Callbacks - Async/Await syntax
Testing	7%	- Unit testing concepts - Test coverage and reliability - Writing and modifying unit tests - Test effectiveness evaluation
Variables, Types, and Collections	23%	- JSON parsing and manipulation - Primitive and complex data types - Arrays and collections - Variable declarations and initialization - Type coercion and conversion - Truthy and falsy evaluations - Strings, numbers, and dates

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100％合格率JavaScript-Developer-I｜一番優秀なJavaScript-Developer-I問題サンプル試験｜試験の準備方法Salesforce Certified JavaScript Developer (JS-Dev-101)日本語対策問題集

JavaScript-Developer-I学習教材は、すべての人々がJavaScript-Developer-I証明書を求めて戦うのを支援し、新しいスキルの開発を支援することを目的としています。この競争の激しい世界で生き残りたいのであれば、現代の企業の要件に適応する包括的な開発計画が必要です。長年にわたる献身と品質保証のために、JavaScript-Developer-I準備試験をお勧めします。 JavaScript-Developer-I学習教材の無料デモを無料でダウンロードして、JavaScript-Developer-I試験問題がどれほど優れているかを知ることができます。

Salesforce Certified JavaScript Developer (JS-Dev-101) 認定 JavaScript-Developer-I 試験問題 (Q108-Q113):

質問 # 108
Refer to the code below:
for(let number =2 ; number <= 5 ; number += 1 ) {
// insert code statement here
}
The developer needs to insert a code statement in the location shown. The code statement has these requirements:
1. Does require an import
2. Logs an error when the boolean statement evaluates to false
3. Works in both the browser and Node.js
Which meet the requirements?

A. console.error(number % 2 === 0);
B. console.debug(number % 2 === 0);
C. console.assert(number % 2 === 0);
D. assert (number % 2 === 0);

正解：A

質問 # 109
developer creates a new web server that uses Node.js. It imports a server library that uses events and callbacks for handling server functionality.
The server library is imported with require and is made available to the code by a variable named server. The developer wants to log any issues that the server has while booting up.
Given the code and the information the developer has, which code logs an error at boost with an event?

A. Server.catch ((server) => {
console.log('ERROR', error);
});
B. Server.on ('error', (error) => {
console.log('ERROR', error);
});
C. Server.error ((server) => {
console.log('ERROR', error);
});
D. Try{
server.start();
} catch(error) {

正解：B

解説：
console.log('ERROR', error);
}

質問 # 110
Given the code below:
Const copy = JSON.stringify((new String ('false') , new Bolean(false) undefined)); What is the value of copy?

A. -- [\''false\'', false, null]" "
B. -- [\''false\", ()""
C. --[ false, ()]-
D. -- [ \'false\'', false, undefined]'' ''

正解：A

質問 # 111
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 number in the array, The test passes:
Let res = sum2([1, 2, 3 ]) ;
console.assert(res === 6 );
Res = sum3([ 1, 2, 3, 4]);
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. The test passes:
Which two results occur when running the test on the updated sum3 function ?
Choose 2 answers

A. The line 05 assertion fails.
B. The line 05 assertion passes.
C. The line 02 assertion passes.
D. The line 02 assertion fails

正解：A、C

質問 # 112
Refer to the code snippet below:
Let array = [1, 2, 3, 4, 4, 5, 4, 4];
For (let i =0; i < array.length; i++)
if (array[i] === 4) {
array.splice(i, 1);
}
}
What is the value of array after the code executes?

A. [1, 2, 3, 4, 5, 4, 4]
B. [1, 2, 3, 4, 5, 4]
C. [1, 2, 3, 5]
D. [1, 2, 3, 4, 4, 5, 4]

正解：D

解説：

質問 # 113
......

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