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PDII-JPN Valid Test Preparation & PDII-JPN Valid Test Tips

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PDII-JPN Valid Test Preparation & PDII-JPN Valid Test Tips

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Salesforce  Sample Questions (Q28-Q33):NEW QUESTION # 28
部分的なページ更新を実行する Ajax 動作を開始するために使用できる 3 つの Visualforce コンポーネントはどれですか?
3 つの答えを選択してください
  • A. <apex:commandButton>
  • B. <apex:actionsStatus>
  • C. <apex:commondLink>
  • D. <apex:actionSupport>
  • E. <Apex:フォーム>
Answer: A,C,D
Explanation:
The three Visualforce components that can be used to initiate Ajax behavior to perform partial page updates are apex:commandLink, apex:commandButton, and apex:actionSupport. These components allow the developer to invoke an Apex controller method or a JavaScript function, and specify a apex:actionStatus or a apex:reRender attribute to update a part of the page without refreshing the whole page. The apex:commandLink and apex:commandButton components render as HTML links or buttons, respectively, and can be used to trigger an action when the user clicks on them. The apex:actionSupport component can be used to add Ajax support to any other component, and can be used to trigger an action when the user performs an event, such as mouseover, change, or blur. The apex:form component is not a valid answer, as it is used to enclose the components that need to interact with the server, but it does not initiate Ajax behavior by itself. The apex:actionStatus component is not a valid answer, as it is used to display the status of an Ajax request, such as a loading message or a spinner, but it does not initiate Ajax behavior by itself. Reference: [Visualforce Components Reference], [Visualforce Developer Guide]

NEW QUESTION # 29
ある企業が最近、組織内の商談に関する情報をデータグリッドに表示するカスタムコントローラを備えたVisualforceページをリリースしました。ユーザーから、特定の状況下で「ビューステートの最大サイズ制限」というエラーメッセージが表示されるという報告がありました。Visualforceのベストプラクティスによると、ビューステートのサイズを縮小するために開発者が実行すべき3つのアクションはどれですか？
  • A. 状態を維持しない変数には、Apex コントローラで transient キーワードを使用します。
  • B. フィルターとページ区切りを使用してデータ量を減らします。1819
  • C. SOQLクエリを絞り込み、ページに関連するデータのみを返します。2021
  • D. コントローラ内の変数にはprivateキーワードを使用します。1415
  • E. 変更されない変数の場合は、コントローラ内でfinalキーワードを使用します。1617
Answer: A,B,C
Explanation:
24
The Visualforc25e View State holds the state of the page (including controller variables) between server requests. It has a strict limit of 135KB. When a page handles large sets of data, like a grid of Opportunities, the view state can easily exceed this limit.
* Transient Keyword (Option A): This is the most effective programmatic way to reduce view state.
Marking a variable as transient prevents it from being serialized into the view state. This should be used for any data that is only needed for the current request and does not need to be maintained during a postback (e.g., large lists of records retrieved for a single display).
* Filters and Pagination (Option D): By using a StandardSetController or custom offset logic, the developer can limit the number of records held in memory at any given time. Instead of loading 5,000 Opportunities, the page can load and store only 20 records per page.
* Refine SOQL Queries (Option E): Developers often query "all" fields (e.g., SELECT * equivalent) or include large text areas that aren't displayed. By selecting only the specific fields required for the grid, the size of each object in the collection is reduced, directly lowering the view state.
Option B and C (private and final) affect variable visibility and immutability but do not prevent the variables from being serialized into the view state.

NEW QUESTION # 30
Apex メソッドを Lightning Web コンポーネントから命令的に呼び出す必要がある 2 つのシナリオはどれですか?
2つの答えを選択してください
  • A. Lightning Web コンポーネントのメイン コントローラの外部にあるメソッドの呼び出し
  • B. Web サービスの呼び出しを行うメソッドの呼び出し
  • C. cacheable=true のアノテーションが付けられていないメソッドの呼び出し
  • D. ボタンをクリックしてメソッドを呼び出す
Answer: C,D

NEW QUESTION # 31
ビジネスでは、すべての親レコードに子レコードが必要です。開発者は、親レコードと子レコードを挿入する 2 つの DML ステートメントを含む Apex メソッドを記述します。
入力規則により、子レコードの作成がブロックされます。このメソッドは、try/catch ブロックを使用して DML 例外を処理します。
親レコードが常に子レコードを持つようにするには、開発者は何をする必要がありますか?
  • A. Database.insert () を使用し、allorNone パラメータを true に設定します。
  • B. エラーが発生した場合にデータベースのセーブポイントをロールバックに設定します。
  • C. 子レコードの DML 操作でエラーが発生した場合、catch ステートメントで親レコードを削除します。
  • D. 子レコードでエラーが発生した場合、親レコードで addError() を使用します。
Answer: B

NEW QUESTION # 32
開発者は、ユーザがカスタム Lightning ページから直接、選択した製品のケースを作成できるようにする Lightning Web コンポーネントを作成する任務を負っています。コンポーネントの入力フィールドは、ユーザーがフィールドの意味をよりよく理解できるように、製品の画像の上に非直線的に表示されます。
開発者が Lightning Web コンポーネントからケースの作成を実装するには、どの 2 つのコンポーネントを使用する必要がありますか?
2 つの答えを選択してください
  • A. Lightning レコード編集
  • B. ライトニング入力フィルム
  • C. 稲妻レコード形式
  • D. 雷入力
Answer: C,D
Explanation:
To implement a Lightning web component that allows users to create a Case, you would need components that allow for input fields and the creation of records.
Option C (Lightning-input) is correct because it allows developers to create custom form input elements that can be positioned in a non-linear fashion as required.
Option D (lightning-record-form) is correct because it provides a simple way to create forms for viewing and editing Salesforce records and would be suitable for creating a new Case record.
Option A (Lightning-record-edit-form) is not a valid component; it seems to be a misprint of lightning-record-edit-form, which is indeed a component used for creating and editing records but was not listed as an option.
Option B (lightning-input-field) is used within the lightning-record-edit-form or lightning-record-view-form components to create editable or displayable fields respectively, but is not as versatile as lightning-input for custom layout purposes.
References:
Lightning Web Components Documentation: Lightning-input

NEW QUESTION # 33
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