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Salesforce Sample Questions (Q155-Q160):

NEW QUESTION # 155
プラットフォーム イベントが Salesforce 組織で定義された後、イベントを発行できるメカニズムはどれですか?
2つの答えを選択してください

Answer: A,C


NEW QUESTION # 156
会社には多くの Lightning コンポーネントを含む Lightning ページがあり、一部は参照データをキャッシュしています
を。このページには常に最新の参照データが表示されているとは限らないことが報告されています。開発者は、Lightning ページの問題を分析および診断するために何を使用できますか?

Answer: B


NEW QUESTION # 157
日付とレコードタイプ間のORを使用するクエリは、大容量データ環境ではパフォーマンスが低下します。開発者はどのようにこれを最適化できますか？

Answer: C

Explanation:
Comprehensive and Detailed Explanation:
In SOQL, using the OR operator often prevents the Query Optimizer from using indexes effectively, especially if the fields involve different types of data. This is known as a "non-selective" query structure in LDV environments.
By breaking the query into two separate SOQL statements (Option A), the developer allows each query to be evaluated independently.
* SELECT ... FROM Account WHERE CreatedDate = :thisDate (Uses the standard index on CreatedDate).
* SELECT ... FROM Account WHERE RecordTypeId = :goldenRT (Uses the standard index on RecordTypeId).
The developer can then combine the results into a Map<Id, Account> to ensure uniqueness (preventing duplicates if a record meets both criteria). This approach ensures both queries are "selective" and run much faster than a single query with an OR filter.
Option D is a common anti-pattern because formulas are generally not indexed unless they are "deterministic" and a custom index is requested from Salesforce support; even then, filtering on formulas is often slower than direct field filters. Option B and C do not address the underlying database performance issue.


NEW QUESTION # 158
開発者は、取引先の登録に使用される Lightning Web コンポーネントからの入力に基づいて取引先を更新する Apex クラスを作成しました。アカウントの更新は、まだ登録されていない場合にのみ行う必要があります。

ユーザーが同時に更新を行った場合に、同じアカウントに対する互いの更新を上書きしないようにするために、開発者は何をすべきですか?

Answer: A


NEW QUESTION # 159
以下のオプションのクエリと次の情報を考慮してください。
* これらのクエリでは、200,000 を超える取引先レコードがあると想定しています。
* これらのレコードには、論理的に削除されたレコードが含まれます。つまり、削除されたレコードがまだごみ箱に残っています。
* には外部 ID としてマークされているフィールドが 2 つあります。
アカウント。これらのフィールドは、customer_Number_c と ERR_Key_s です。
大量のデータに対して最適化されている 2 つのクエリはどれですか?
2 つの答えを選択してください

Answer: B,D

Explanation:
For optimizing queries, especially on large data volumes, it's recommended to use indexed fields such as External ID fields, which will make the queries selective. Among the options given:
B) is optimized because it is using the Customer_Number__c field, which is an External ID and hence indexed.
D) is also optimized because it filters out deleted records with IsDeleted = false and uses Name != ' ', which is likely to be selective.
Using indexed fields and filtering out unnecessary records helps in faster query execution on large data volumes.
References:
Make SOQL Query Selective
Working with Very Large SOQL Queries


NEW QUESTION # 160
......

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