効果的なPDII参考書勉強試験-試験の準備方法-高品質なPDII模擬トレーリングGoShikenのSalesforceのPDII試験トレーニング資料を手に入れたら、あなたは試験に準備するからの悩みや不安を消えてしまうことができます。GoShikenのSalesforceのPDII試験トレーニング資料は現在、市場上で一番質のいい学習教材です。それを使って、SalesforceのPDII認定試験に合格する率は１００パーセントになっています。GoShikenを選び、成功を選ぶのに等しいです。
PDII認定を獲得することは、Salesforce開発者にとって重要な成果です。これは、世界で最も人気のあるCRMプラットフォームの1つでカスタムアプリケーションの開発に関する専門知識を示しているためです。 PDII認定開発者は需要が高く、より高い給与とより良い雇用機会を命じることができます。さらに、PDII認定は、Salesforce Certified Technical Architect（CTA）など、他の高度な認定の前提条件です。 Salesforce Platform Developer II 認定 PDII 試験問題 (Q109-Q114):質問 # 109
Consider the following code snippet:
As part of the deployment cycle, a developer creates the following test class:
When the test class runs, the assertion fails.
Which charge should the developer implement in the Apex test method to ensure the test method execute successfully?
A. Add @IsTest(seeAllData=True) to line 12 and enclose lines 14 and 15 within Test.startTest () and test.stopTest()
B. Query the Standard User into memory and enclose lines 14 and 15 within the System.runAs (user) method.
C. Query the Administrator user into memory and enclose lines 14 and 15 within the System,runAs (user) method.
D. Add System.runAs (User) to line 14 and enclose line 14 within Test.startTest() and Test.stoptest ().
正解：D
質問 # 110
A developer is creating a page in App Builder that will be used in the Salesforce mobile app.
Which two practices should the developer follow to ensure the page operates with optimal performance?
Choose 2 answers
A. Limit the number of Tabs and Accordion components.
B. Analyze the page with Performance Analysis for App Builder.
C. Limit 25 fields on the record detail page.
D. Limit five visible components on the page.
正解：A、B
解説：
For mobile app pages in App Builder, best practices include limiting the number of heavy components like Tabs and Accordion because they can negatively impact performance due to increased client-side processing and data transfer. Also, using Performance Analysis in App Builder helps in identifying components that may slow down page performance and provides recommendations for improvements. References:
Optimize Performance in the Salesforce Mobile App
Lightning App Builder Performance Analysis
質問 # 111
Which type of controller is best suited when you want all of the basic DML functions from an object's normal new/edit page?
A. Custom Controller
B. Standard Controller
C. Controller Extensions
D. Standard List/Set Controller
正解：D
質問 # 112
Part of a custom Lightning component displays the total number of Opportunities in the org, which are in the millions. The Lightning component uses an Apex method to get the data it needs. What is the optimal way for a developer to get the total number of Opportunities for the Lightning component?
A. Apex batch job that counts the number of Opportunity records
B. SUM () SOQL aggregate query on the Opportunity object
C. COUNT () SOQL aggregate query on the Opportunity object
D. SOQL for loop that counts the number of Opportunities records
正解：C
解説：
When you need to retrieve the total count of records in a large dataset (millions of records), a SOQL aggregate query using COUNT() (Option A) is the most efficient and performant method. Salesforce optimizes aggregate functions at the database 13level. Unlike a standard query that returns in14dividual records and counts against the "50,000 SOQL rows" limit, a COUNT() query returns a single integ15er result and counts as only one row to16ward the governor limits.17 This allows a developer to count millions of records in a single synchronous transactio18n without hitting row limits or causing significant CPU time issues. Option D (SOQL for loop) is the worst approach, as it would attempt to load every individual record into memory, hitting the 50,000-row limit almost immediately and likely causing a LimitException or Request Timeout.
Option B (Batch Apex) is unnecessary for a simple count and is much slower because it runs asynchronously.
Option C (SUM) is used for adding up values in numeric fields, not for counting the number of records. For high-volume record counting, SELECT COUNT(Id) FROM Opportunity is the platform-standard approach to provide data to a Lightning component efficiently.
質問 # 113
A company wants to implement a new call center process for handling customer service calls. It requires service reps to ask for the caller's account number before proceeding with the rest of their call script. Following best practices, what should a developer use to meet this requirement?
