從Google Drive中免費下載最新的VCESoft JavaScript-Developer-I PDF版考試題庫：https://drive.google.com/open?id=10pYhouu8yUtkMAwjmewCUjDBmfM3Rjoi
Salesforce JavaScript-Developer-I 認證考試已經成為了IT行業中很熱門的一個考試，但是為了通過考試需要花很多時間和精力掌握好相關專業知識。在這個時間很寶貴的時代，時間就是金錢。VCESoft為Salesforce JavaScript-Developer-I 認證考試提供的培訓方案只需要20個小時左右的時間就能幫你鞏固好相關專業知識，讓你為第一次參加的Salesforce JavaScript-Developer-I 認證考試做好充分的準備。
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Asynchronous Programming | 13% | - Event loop and execution flow - Async/Await syntax - Callbacks - Promises (creation, chaining, error handling) - Asynchronous patterns for business requirements |
| Topic 2: Variables, Types, and Collections | 23% | - Type coercion and conversion - Strings, numbers, and dates - Arrays and collections - Variable declarations and initialization - Primitive and complex data types - JSON parsing and manipulation - Truthy and falsy evaluations |
| Topic 3: Testing | 7% | - Test coverage and reliability - Writing and modifying unit tests - Test effectiveness evaluation - Unit testing concepts |
| Topic 4: Objects, Functions, and Classes | 25% | - Prototypal inheritance - Execution flow and context - Object creation and manipulation - Higher-order functions - Function declarations and expressions - ES6 classes and inheritance - Arrow functions - Modules and decorators - Variable scope and closures |
| Topic 5: Browser and Events | 17% | - Interacting with forms and user input - Event propagation (bubbling and capturing) - Browser-specific APIs - DOM manipulation - Event handling and listeners - Browser Developer Tools usage |
| Topic 6: Server Side JavaScript | 8% | - CLI commands - Node.js fundamentals - Package management (npm) - Server-side JavaScript implementations - Core Node.js modules |
| Topic 7: Debugging and Error Handling | 7% | - Console methods for debugging - Error handling techniques (try/catch/finally) - Custom error types - Breakpoints and code inspection |
>> JavaScript-Developer-I在線題庫 <<
我的很多IT行業的朋友為了通過Salesforce JavaScript-Developer-I 認證考試花費了很多時間和精力，但是他們沒有選擇培訓班或者網上培訓，所以對他們而言通過考試是比較有難度的，一般他們的一次性通過的幾率很小。幸運地是VCESoft提供了最可靠的培訓工具。VCESoft提供的培訓材料包括Salesforce JavaScript-Developer-I 認證考試的類比測試軟體和相關類比試題，練習題和答案。我們可以提供最佳最新的Salesforce JavaScript-Developer-I 認證考試的練習題和答案來滿足你的需求。
問題 #31
Refer to the following code:
What is returned by the function call on line 13?
答案：B
問題 #32
A developer copied a JavaScript object:
01 function Person() {
02 this.firstName = " John " ;
03 this.lastName = " Doe " ;
04 this.name = () = > `${this.firstName},${this.lastName}`;
05 }
06
07 const john = new Person();
08 const dan = Object.assign({}, john);
09 dan.firstName = ' Dan ' ;
How does the developer access dan ' s firstName, lastName?
答案：A
解題說明：
* Person instances have:
* firstName and lastName as string properties.
* A name method that returns a combined string: `${this.firstName},${this.lastName}`.
* Object.assign({}, john) creates a shallow copy of john into a new object, dan.
After:
dan.firstName = ' Dan ' ;
* dan.name() returns " Dan,Doe " .
Analysis of options:
* A: dan.firstName() and dan.lastName() are function calls , but firstName/lastName are strings, not functions # TypeError.
* B: Calls the defined method and uses both names correctly.
* C: dan.name is a function reference; you'd still need to call it: dan.name().
* D: dan.firstName + dan.lastName is " DanDoe " , no separator. It accesses the properties but not in the method the developer defined.
The intended way, using the provided API, is dan.name().
問題 #33
developer uses the code below to format a date.
After executing, what is the value of formattedDate?
答案：A
問題 #34
A developer wrote a fizzbuzz function that when passed in a number, returns the following:
Fizz if the number is divisible by 3.
Buzz if the number is divisible by 5.
Fizzbuzz if the number is divisible by both 3 and 5.
Empty string if the number is divisible by neither 3 or 5.
Which two test cases will properly test scenarios for the fizzbuss function?
答案：A,D
問題 #35
A 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 boot time with an event?
A)
B)
C)
D)
答案：B
問題 #36
......
想要通過Salesforce的JavaScript-Developer-I考試並取得JavaScript-Developer-I的認證資格嗎？VCESoft可以保證你的成功。準備考試的時候學習與考試相關的知識是很有必要的。但是，更重要的是，要選擇適合自己的高效率的工具。VCESoft的JavaScript-Developer-I考古題就是適合你的最好的學習方法。這個高品質的考古題可以讓你看到不可思議的效果。如果你擔心自己不能通過考試，快點擊VCESoft的網站瞭解更多的資訊吧。
JavaScript-Developer-I熱門證照: https://www.vcesoft.com/JavaScript-Developer-I-pdf.html
此外，這些VCESoft JavaScript-Developer-I考試題庫的部分內容現在是免費的：https://drive.google.com/open?id=10pYhouu8yUtkMAwjmewCUjDBmfM3Rjoi