Salesforce Certified JavaScript Developer 試験対策問題集

模擬試験モードの設定

上記は本サイトの模擬試験モードの設定値です。実際の試験の出題数・制限時間・合格基準は、各認定プログラムの公式サイトでご確認ください。

出題分野

• Variables, Types, and Collections（変数・型・コレクション）（出題比率 23%）
• Objects, Functions, and Classes（オブジェクト・関数・クラス）（出題比率 25%）
• Browser and Events（ブラウザとイベント）（出題比率 17%）
• Debugging and Error Handling（デバッグとエラー処理）（出題比率 7%）
• Asynchronous Programming（非同期プログラミング）（出題比率 13%）
• Server Side JavaScript（サーバサイドの実行環境とパッケージ管理）（出題比率 8%）
• Testing（単体テストの有効性）（出題比率 7%）

フリー問題

1. A form field returns the string '0'. A developer needs a comparison that treats …
2. A developer writes the following two lines after declaring const settings = { th…
3. A developer needs to build a Date for the third of March in a given year and the…
4. A developer needs a new array holding the length of every name in names, without…
5. A utility must branch when its argument is an array rather than a plain object. …
6. A loop creates one function per iteration and each function must remember the va…
7. A method must be passed as a callback and must keep its receiver. Which approach…
8. An object must be created with a specified object as its prototype and no own pr…
9. A team writes guidance for designing units that are easy to verify. Which two pi…
10. A timer inside an object method must be able to read the object's own properties…
11. A single listener is attached to a list element and handles clicks on the items …
12. A team reviews the options accepted when a listener is registered. Which two sta…
13. A click happens on a button that sits inside a nested set of elements, and every…
14. A team needs callers to distinguish a validation failure from other failures wit…
15. Two independent requests each take about one second. The code awaits the first a…
16. An async function awaits a call that rejects. The surrounding code needs to hand…
17. A legacy helper takes an error first callback. A team wants to await it. What is…
18. A tool reads one small configuration file at startup, before it accepts any work…
19. A server side script must build a file location from a directory name and a file…
20. A test calls the function under test, stores the result in a variable and then e…