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| Section | Objectives |
|---|---|
| User Interface Development | - Lightning Component Development
|
| Integration and Security | - Security implementation
|
| Testing, Debugging, and Deployment | - Deployment practices
|
| Advanced Apex Programming and Data Modeling | - Advanced Apex concepts
|
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NEW QUESTION # 40
Universal Containers は、外部 JavaScript および C55 ファイルを含める必要がある Visualforce ページを開発します。彼らは、ページの効率的な読み込みとキャッシュを確保したいと考えています。
この目標を達成するにはどの機能を利用する必要がありますか?
Answer: C
Explanation:
Static resources are ideal for efficient loading and caching of external files in Visualforce. They allow bundling and minimizing HTTP requests.
References: Using Static Resources
NEW QUESTION # 41
開発者は、ゲストがフロントデスクのキオスクに到着した際にセルフ登録できるAuraコンポーネントを構築しました。次に、ゲストがフロントデスクに到着した際にユーティリティトレイに通知するコンポーネントを作成する必要があります。どのようなコンポーネントを使用すればよいでしょうか？
Answer: A
Explanation:
18
In the Aura Component framework, communication between components is handled via events. When two components need to communicate but do19 not share a direct parent-child relationship-such as a kiosk registration component on a page and an alert component residing in the global utility tray-an Application Event (Option C) is required.
Application events follow a "publish-subscribe" model. One component fires the event, and any other component in the application that has a handler for that specific event type can listen for and react to it, regardless of where they sit in the component hierarchy. This is distinct from a Component Event (Option D), which is restricted to bubbling up the component containment hierarchy (from child to parent).
While modern implementations might also consider the Lightning Message Service (LMS) for cross- framework communication (between Aura, LWC, and Visualforce), within the specific context of Aura-to- Aura communication for decoupled components like utility bar items, Application Events remain the fundamental architectural solution. DML Operations (Option A) and ChangeLogs (Option B) are database- level concepts and do not provide the real-time, client-side notification capabilities needed for a UI alert system.
NEW QUESTION # 42
Lightning Web コンポーネントを構築するときに、データ取得で最高のパフォーマンスを得るために開発者が実装する必要がある 3 つのアプローチはどれですか? 3 つの答えを選択してください
Answer: A,B,E
Explanation:
To obtain the best performance for data retrieval when building a Lightning web component, the developer should implement three approaches: use lazy load for occasionally accessed data, use the Lightning Data Service, and use {cacheable=true} whenever possible. Lazy loading is a technique that loads data on demand, instead of loading all the data at once. This can improve the responsiveness and performance of the component, as it reduces the network traffic and processing time. The developer can use the enable-infinite-loading attribute of the lightning-datatable component to implement lazy loading for large data sets. The Lightning Data Service is a layer of the Lightning Platform that provides access to Salesforce data and metadata, cache management, and data synchronization. The developer can use the Lightning Data Service to retrieve and manipulate data without writing Apex code or making server calls. The developer can use the @wire decorator or the uiRecordApi service to access the Lightning Data Service. The {cacheable=true} annotation is used to mark an Apex method as cacheable, which means that the method can be invoked by a Lightning web component that uses the @wire decorator. This can improve the performance of the component, as it reduces the number of server trips and leverages the client-side cache. The developer should use this annotation whenever possible for methods that return data that does not change frequently or does not depend on the user context. Reference: [Lazy Loading in Lightning Web Component], [Lightning Data Service Basics], [Call Apex Methods from Lightning Web Components]
NEW QUESTION # 43
組織は、配送先住所のフィールドを持つカスタムオブジェクト ordar__c に顧客の注文情報を記録します。開発者は、配送先住所の地域に関連付けられた一律の割合に基づいて、注文の配送料を計算するコードを追加するという任務を負っています。
変更を運用環境にデプロイするときに、計算が機能するために追加の手順が必要ないように、開発者はリージョンごとの料金を保存するために何を使用する必要がありますか?
Answer: D
NEW QUESTION # 44
ある大企業では、複数の部門でSalesforceを使用しています。各部門には専任のSalesforce管理者がおり、各管理者が変更をテストするためのサンドボックスを個別に用意することが合意されました。
最近、ある部門に最近追加したフィールドが、何の警告もなく突然消えてしまうことにユーザーが気づきました。この問題と解決策に関して、正しい記述はどれですか？3637
Answer: B,C
Explanation:
This scenario highlights a common conflict in multi-admin environments known as "the last delivery wins" problem. When multiple administrators work in isolated sandboxes, they are essentially working on different versions of the same metadata. If Admin A adds a field to a Page Layout and deploys it, and then Admin B- who does not have Admin A's changes in their sandbox-deploys their own version of that same Page Layout, Admin B's deployment will overwrite Admin A's changes in Production (Statement B). In the Metadata API (which Change Sets use), Page Layouts are treated as single files; you cannot "merge" them via a Change Set; you can only replace the destination file entirely.
To resolve this, the team needs a more sophisticated deployment pipeline. Statement D is the correct resolution: the company should implement a "Staging" or "Integration" sandbox. In this model, all admins deploy their Change Sets to a single unified sandbox first. This allows them to identify conflicts and "merge" their changes (manually or via source control) before a final, combined deployment is made to Production.
Statement A is technically incorrect because Change Sets cannot "delete" components; they can only overwrite or add. Statement C is a myth; Page Layouts can be safely deployed, but only if the underlying fields and security settings are also included and coordinated.
NEW QUESTION # 45
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