2026 Pass4Test 최신 JavaScript-Developer-I PDF 버전 시험 문제집과 JavaScript-Developer-I 시험 문제 및 답변 무료 공유: https://drive.google.com/open?id=1JNGF9CoC3TEyntGFBPwlYJKXe8ud7YJz
Pass4Test는 여러분의 요구를 만족시켜드리는 사이트입니다. 많은 분들이 우리사이트의 it인증덤프를 사용함으로 관련it시험을 안전하게 패스를 하였습니다. 이니 우리 Pass4Test사이트의 단골이 되었죠. Pass4Test에서는 최신의Salesforce JavaScript-Developer-I자료를 제공하며 여러분의Salesforce JavaScript-Developer-I인증시험에 많은 도움이 될 것입니다.
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Debugging and Error Handling | 7% | - Breakpoints and code inspection - Console methods for debugging - Error handling techniques (try/catch/finally) - Custom error types |
| Topic 2: Browser and Events | 17% | - DOM manipulation - Browser-specific APIs - Event handling and listeners - Interacting with forms and user input - Event propagation (bubbling and capturing) - Browser Developer Tools usage |
| Topic 3: Server Side JavaScript | 8% | - Server-side JavaScript implementations - Core Node.js modules - Node.js fundamentals - Package management (npm) - CLI commands |
| Topic 4: Testing | 7% | - Test coverage and reliability - Writing and modifying unit tests - Test effectiveness evaluation - Unit testing concepts |
| Topic 5: Objects, Functions, and Classes | 25% | - Variable scope and closures - ES6 classes and inheritance - Higher-order functions - Arrow functions - Modules and decorators - Prototypal inheritance - Object creation and manipulation - Execution flow and context - Function declarations and expressions |
| Topic 6: Variables, Types, and Collections | 23% | - Type coercion and conversion - Primitive and complex data types - JSON parsing and manipulation - Truthy and falsy evaluations - Arrays and collections - Strings, numbers, and dates - Variable declarations and initialization |
| Topic 7: Asynchronous Programming | 13% | - Callbacks - Async/Await syntax - Promises (creation, chaining, error handling) - Event loop and execution flow - Asynchronous patterns for business requirements |
>> JavaScript-Developer-I최신시험 <<
경쟁율이 점점 높아지는 IT업계에 살아남으려면 국제적으로 인증해주는 IT자격증 몇개쯤은 취득해야 되지 않을가요? Salesforce JavaScript-Developer-I시험으로부터 자격증 취득을 시작해보세요. Salesforce JavaScript-Developer-I 덤프의 모든 문제를 외우기만 하면 시험패스가 됩니다. Salesforce JavaScript-Developer-I덤프는 실제 시험문제의 모든 유형을 포함되어있어 적중율이 최고입니다.
질문 # 78
Refer to the code below:
let o = {
get js() {
let city1 = String("st. Louis");
let city2 = String(" New York");
return {
firstCity: city1.toLowerCase(),
secondCity: city2.toLowerCase(),
}
}
}
What value can a developer expect when referencing o.js.secondCity?
정답：D
질문 # 79
A developer has the following array of hourly wages:
Let arr = (8, 5, 9, 75, 11, 25, 7, 75, , 13, 25);
For workers making less than $10 an hour rate should be multiple by 1.25 and returned in a new array.
How should the developer implement the request?
정답：B
질문 # 80
Refer to the code below:
01 const myFunction = arr = > {
02 return arr.reduce((result, current) = > {
03 return result + current;
04 }, 10);
05 }
What is the output of this function when called with an empty array?
정답：D
설명：
We call:
myFunction([]);
Inside:
arr.reduce((result, current) = > {
return result + current;
}, 10);
Key points about Array.prototype.reduce:
* Signature: array.reduce(callback, initialValue)
* If initialValue is provided and the array is empty , reduce:
* Does not call the callback at all.
* Simply returns initialValue.
Here:
* arr is [] (empty).
* initialValue is 10.
So:
* No iterations of the callback happen (no elements to process).
* The return value is the initial value: 10.
So the actual output is:
myFunction([]) === 10;
Among the options:
* A: 0 - incorrect, because the initial value is 10, not 0.
* B: Throws an error - reduce throws only if the array is empty and there is no initialValue. Here we have an initial value, so no error.
* C: NaN - there is no arithmetic with undefined or invalid values; we just return 10.
* D: Returns 5 - the numeric value given is wrong; the correct value is 10.
Given the logic, the correct conceptual result is 10 . The option text "Returns 5" is almost certainly a typo for "Returns 10". Since the letter that is intended to represent the correct behavior is D, we keep:
The answer: D
Study Guide / Concept References (no links):
* Array.prototype.reduce behavior with initialValue
* Behavior of reduce on an empty array with and without initialValue
* Return value when no iterations run
질문 # 81
Refer to the code below:
Which statement allows a developer to cancel the scheduled timed function?
정답：D
질문 # 82
A developer has the function, shown below, that is called when a page loads.
Where can the developer see the log statement after loading the page in the browser?
정답：B
질문 # 83
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Salesforce인증 JavaScript-Developer-I시험을 통과하여 자격증을 취득하여 IT 업계에서의 자신의 자리를 지키려면 많은 노력이 필요합니다. 회사일도 바쁜데 시험공부까지 스트레스가 장난아니게 싸이고 몸도 많이 상하겠죠. Pass4Test는 여러분을 위해 최신Salesforce인증 JavaScript-Developer-I시험에 대비한Salesforce인증 JavaScript-Developer-I덤프를 발췌하였습니다. Salesforce인증 JavaScript-Developer-I덤프는Salesforce인증 JavaScript-Developer-I시험의 기출문제와 예상문제가 묶어져 있어 시험적중율이 굉장히 높습니다. 쉽게 시험을 통과하려면Pass4Test의 Salesforce인증 JavaScript-Developer-I덤프를 추천합니다.
JavaScript-Developer-I최신버전 공부자료: https://www.pass4test.net/JavaScript-Developer-I.html
참고: Pass4Test에서 Google Drive로 공유하는 무료, 최신 JavaScript-Developer-I 시험 문제집이 있습니다: https://drive.google.com/open?id=1JNGF9CoC3TEyntGFBPwlYJKXe8ud7YJz