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Salesforce Plat-Dev-301 Exam Syllabus Topics:

Section	Weight	Objectives
Advanced Developer Fundamentals	15%	- Work with localization, multi-currency, and global features - Apply security best practices in development - Design and maintain scalable, reusable code
Logic, Process Automation, and Integration	27%	- REST/SOAP API, Platform Events, and external integrations - Complex business logic and automation design - Asynchronous Apex: future, queueable, batch, scheduled - Advanced Apex programming and transaction management
Performance and Data Management	18%	- Governor limits optimization and best practices - Data modeling and complex data operations - Optimize queries and handle large data volumes
User Interface Development	20%	- Optimize UI performance and usability - Implement advanced Visualforce functionality - Build complex Lightning Web Components and Aura Components
Testing, Debugging, and Deployment	20%	- Deployment strategies, CI/CD, and change management - Debugging and error handling across layers - Advanced testing strategies and test frameworks

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最新的 Salesforce Developer Plat-Dev-301 免費考試真題 (Q53-Q58):

問題 #53
An Apex trigger creates an order co record every time an Opportunity is won by a Sales Rep. Recently the trigger is creating two orders.
What is the optimal technique for 2 developer to troubleshoot this?

A. Run the Apex Test Classes for the Apex trigger to ensure the code still has sufficient code coverage.
B. Disable all flows, and then re-enable them one at at time to see which one causes the error.
C. Set up debug logging for every Sales Rep, then monitor the logs for errors and exceptions,
D. Add system.debug() statements to the code and use the Developer Console logs to trace the code.

答案：D

解題說明：
To troubleshoot the issue of a trigger creating two order records, adding System.debug() statements in the trigger and analyzing the log output in the Developer Console is an effective technique. This will help identify if the trigger is being called more than once or if there is another automation (such as a flow or workflow) causing the additional record creation.

問題 #54
Universal Containers develops a Visualforce page that requires the inclusion of external JavaScript and C55 files. They want to ensure efficient loading and caching of the page.
Which feature should be utilized to achieve this goal?

A. Static resources
B. PageBlockTable
C. RemoteAction
D. ActionFunction

答案：A

解題說明：
Static resources are ideal for efficient loading and caching of external files in Visualforce. They allow bundling and minimizing HTTP requests.

問題 #55
Given the following code:

Assuming there were 10 Contacts and five Accounts created today, what is the expected result?

A. Systemn.LimitException: Too many SOQL Queries on Account
B. System.QueryException: List has more than one row for Assignment on Account
C. System.QueryException: Too many DML Statement errors on Contact
D. System.LimitException: Too many SOQL Queries on Contact

答案：B

解題說明：
The loop contains a SOQL query inside, causing it to run multiple times. This will throw a QueryException because the Account query returns more than one row.

問題 #56
A developer is working with existing functionality that tracks how many times a stage has changed for an Opportunity. When the Opportunity's stage is changed, a workflow rule is fired to increase the value of a field by one. The developer wrote an after trigger to create a child record when the field changes from 4 to 5.
A user changes the stage of an Opportunity and manually sets the count field to 4. The count field updates to 5, but the child record is not created.
What is the reason this is happening?

A. After triggers fire before workflow rules.
B. Trigger.new does not change after a field update.
C. Trigger.old does not contain the updated value of the count field.
D. After triggers are not fired after field updates.

答案：C

解題說明：
https://help.salesforce.com/s/articleView?id=000384697&type=1

問題 #57
Universal Containers analyzes a Lightning web component and its Apex controller class that retrieves a list of contacts associated with an account. The code snippets are as follows:

Based on the code snippets, what change should be made to display the contacts' mailing addresses in the Lightning web component?

A. Extend the lightning-datatable component in the Lightning web component to include a column for the MailingAddress field.
B. Add a new method in the Apex controller class to retneve the mailing addresses separately and modify the Lightning web component to invoke this method.
C. Modify the SOQL query in the getAccountContacts method to include the MailingAddress field and update the columns attribute in javascript file to add Mailing address fields.
D. Modify the SOQL guery in the getAccountContacts method to include the MailingAddress field.

答案：C

解題說明：
To display the contacts' mailing addresses in the Lightning web component, both the SOQL query in the getAccountContacts method and the columns attribute in the JavaScript file of the component need to be updated. The query must include the MailingAddress field, and the JavaScript file must be modified to add this field to the columns shown in the lightning-datatable.

問題 #58
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