PDII證照：Platform Developer II幫助您壹次通過Salesforce PDII考試

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最新的 Salesforce Developers PDII 免費考試真題 (Q132-Q137):

問題 #132
Refer to the test method below:

The test method tests an Apex trigger that the developer knows will make a lot of queries when a lot of Accounts are simultaneously updated to be customers.
The test method fails at the Line 20 because of too many SOQL queries.
What is the correct way to fix this?

答案：A

解題說明：
The correct way to fix this is to add Test.startTest() before and add Test.stopTest() after Line 18 of the code.
This will reset the governor limits for the code that executes between these two methods, and allow the test to run without hitting the SOQL query limit. The Test.startTest() and Test.stopTest() methods are used to test code that makes a lot of queries or calls asynchronous methods12. By using these methods, the developer can isolate the code that needs more resources and verify that it does not exceed the governor limits.
References:
Using Limits, startTest, and stopTest | Apex Developer Guide | Salesforce Developers Test.StartTest & Test.StopTest - Salesforce Developer Community Why would a developer use test startTest and test stopTest in Salesforce? | ForceTalks

問題 #133
What is a recommended practice with regard to the Apex CPU limit? (Choose two.)

A. Use Map collections to cache sObjects
B. Optimize SOQL query performance
C. Avoid nested Apex iterations
D. Reduce view state in Visualforce pages

答案：A,C

問題 #134
A company wants to incorporate a third-party web service to set the Address fields when an Account is inserted, if they have not already been set. What is the optimal way to achieve this?

A. Create an Apex trigger, execute a Queueable job from it, and make a callout from the Queueable job.
B. Create an Apex class, execute a Batch Apex job from it, and make a callout from the Batch Apex job.
C. Create an Apex class, execute a Future method from it, and make a callout from the Future method.
D. Create a Before Save Flow, execute a Queueable job from it, and make a callout from the Queueable job.

答案：A

解題說明：
The requirement is to perform a callout when a record is inserted. Because Salesforce prohibits synchronous callouts after DML operations in the same transaction, this must be handled asynchronously.
Queueable Apex (Option C) is the optimal choice for this integration. When an Account is inserted, a trigger captures the ID and enqueues a Queueable job. Queueable is superior to Future methods (Option D) because it supports complex data types (not just primitives), allows for job chaining, and provides a Job ID that can be used for monitoring via AsyncApexJob.
Before-Save Flows (Option A) cannot directly perform callouts, and while they can trigger asynchronous paths, the programmatic control offered by a Trigger-to-Queueable pattern is more robust for complex third- party integrations. Batch Apex (Option B) is designed for bulk processing of existing records and is "overkill" for a real-time, record-by-record trigger requirement. By using a Trigger with Queueable, the developer ensures the address validation happens nearly in real-time without blocking the user's initial save transaction or hitting concurrent request limits.

問題 #135
Given a list of Opportunity records named opportunityList, which code snippet is best for querying all Contacts of the Opportunity's Account?

答案：D

問題 #136
Developer wishes to improve runtime performance of Apex calls by caching results on the client. What is the best way to implement this?

A. Call the setStorable() method on the action in the JavaScript client-side code.
B. Decorate the server-side method with @AuraEnabled(storable=true).
C. Set a cookie in the browser for use upon return to the page.
D. Decorate the server-side method with @AuraEnabled(cacheable=true).

答案：A

問題 #137
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