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従来の見解では、JavaScript-Developer-I練習資料は、実際の試験に現れる有用な知識を蓄積するために、それらに多くの時間を割く必要があります。 ただし、Salesforce DeveloperのSalesforce Certified JavaScript Developer (JS-Dev-101)学習に関する質問はその方法ではありません。 以前のJavaScript-Developer-I試験受験者のデータによると、合格率は最大98〜100％です。 最小限の時間と費用で試験に合格するのに役立つ十分なコンテンツがあります。 Salesforce Developer準備資料の最新コンテンツで学習できるように、当社の専門家が毎日更新状況を確認し、彼らの勤勉な仕事とJavaScript-Developer-I専門的な態度が練習資料にSalesforce Certified JavaScript Developer (JS-Dev-101)品質をもたらします。 Salesforce Developerトレーニングエンジンの初心者である場合は、疑わしいかもしれませんが、参照用に無料のデモが提供されています。
| Section | Weight | Objectives |
|---|---|---|
| Browser and Events | 17% | - Event propagation (bubbling and capturing) - Browser-specific APIs - DOM manipulation - Event handling and listeners - Interacting with forms and user input - Browser Developer Tools usage |
| Server Side JavaScript | 8% | - Package management (npm) - Server-side JavaScript implementations - CLI commands - Node.js fundamentals - Core Node.js modules |
| Debugging and Error Handling | 7% | - Console methods for debugging - Error handling techniques (try/catch/finally) - Custom error types - Breakpoints and code inspection |
| Testing | 7% | - Test effectiveness evaluation - Unit testing concepts - Test coverage and reliability - Writing and modifying unit tests |
| Variables, Types, and Collections | 23% | - Arrays and collections - Truthy and falsy evaluations - Strings, numbers, and dates - JSON parsing and manipulation - Type coercion and conversion - Primitive and complex data types - Variable declarations and initialization |
| Objects, Functions, and Classes | 25% | - ES6 classes and inheritance - Execution flow and context - Variable scope and closures - Higher-order functions - Object creation and manipulation - Modules and decorators - Arrow functions - Function declarations and expressions - Prototypal inheritance |
| Asynchronous Programming | 13% | - Event loop and execution flow - Callbacks - Async/Await syntax - Asynchronous patterns for business requirements - Promises (creation, chaining, error handling) |
>> JavaScript-Developer-Iダウンロード <<
試験の知識が豊富な専門家によってコンパイルされたJavaScript-Developer-I試験トレントをすべての受験者に提供し、JavaScript-Developer-I学習教材のコンパイルの経験が豊富です。最新バージョンを入手したら、できるだけ早くメールボックスに送信します。 JavaScript-Developer-I試験問題では、学生が練習に20〜30時間を費やすだけでJavaScript-Developer-I試験に合格する自信が持てるので、一部の労働者にとっては非常に便利です。 JavaScript-Developer-I試験に合格して目標を達成するための最良のツールでなければなりません。
質問 # 143
Refer to the code below:
const event = new CustomEvent(
//Missing Code
);
obj.dispatchEvent(event);
A developer needs to dispatch a custom event called update to send information about recordId.
Which two options could a developer insert at the placeholder in line 02 to achieve this?
Choose 2 answers
正解：B、C
質問 # 144
Which three options show valid methods for creating a fat arrow function?
Choose 3 answers
正解：A、E
質問 # 145
Which option is true about the strict mode in imported modules?
正解：B
解説：
In JavaScript, ES modules (files imported using import / export) have special semantics:
* All code inside a module is automatically executed in strict mode .
* This is specified by the ECMAScript standard and does not require the explicit " use strict " ; directive.
Effects:
* You do not need to write " use strict " ; at the top of a module file.
* You cannot turn strict mode off for module code.
* All module top-level code is treated as strict.
Now evaluate each option:
Option A:
Add the statement use non-strict; before any other statements in the module to enable notstrict mode.
* There is no use non-strict; directive in JavaScript.
* The only directive recognized by engines is " use strict " ;.
* You cannot explicitly enable a "non-strict" mode with such a string.
Option B:
Imported modules are in strict mode whether you declare them as such or not.
* This matches the language specification.
* ES modules are always in strict mode, automatically.
* This is true.
Option C:
Add the statement use strict = false; before any other statements in the module to enable notstrict mode.
* use strict = false; is not a directive; it is parsed as a normal expression, and does not affect strict mode.
* There is no supported way to disable strict mode in modules.
Option D:
A developer can only reference notStrict() functions from the imported module.
* There is no special notStrict() restriction in modules.
* Functions exported/imported in modules are simply subject to strict mode rules like the rest of the module's code.
Therefore, the only correct statement is:
The answer: B
Study Guide / Concept References (no links):
* ES modules (import / export)
* Automatic strict mode in modules
* " use strict " ; directive for scripts vs modules
* Inability to disable strict mode in ES module code
質問 # 146
Refer to the code below:
Which two function can replace line 01 and return 58 to sum? Choose 2 answers
正解：B、C
質問 # 147
Which statement accurately describes the behaviour of the async/ await keyworks ?
正解：A
質問 # 148
......
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