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Salesforce Plat-Dev-301 Exam Syllabus Topics:

Section	Weight	Objectives
Architecture	18%	- Governor limits and bulkification - Apex Enterprise Patterns - Design patterns and Apex trigger frameworks - Namespace and package management
User Interface	18%	- Aura Components - Lightning Web Components (LWC) advanced features - Lightning Data Service - Visualforce advanced controllers
Testing, Debugging, and Deployment	15%	- Debugging and performance profiling - Deployment tools (SFDX, Metadata API) - Test data strategies and mocking - Apex unit testing best practices
Integration	15%	- Platform Events and Change Data Capture - REST and SOAP web services (Apex callouts) - Named Credentials and authentication - External Services and Connect REST API
Data Modeling	12%	- Large data volumes considerations - External objects and data sources - Advanced object relationships and data modeling
Logic and Process Automation	22%	- Advanced Apex programming - Dynamic Apex and SOQL/SOSL - Asynchronous Apex (Batch, Queueable, Future, Scheduled) - Invocable Actions and Platform Events

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최신 Salesforce Developer Plat-Dev-301 무료샘플문제 (Q66-Q71):

질문 # 66
Universal Containers (UC) has enabled the translation workbench and has translated picklist values. UC has a custom multi-select picklist field, Product__c, on the Account object that allows sales reps to specify which of UC's products an Account already has. A developer is tasked with writing an Apex method that retrieves Account records, including the Product_c field.
What should the developer do to ensure the value of Products__c is in the current user's language?

A. Call the translate method on each record in the SOQL result list.
B. Use the Locale clause in the SOQL query.
C. Use tolabel ducts__c) in the fields list of the SOQL query.
D. Set the locale on each record in the SOQL result list.

정답：C

설명：
Using toLabel() in the SOQL query ensures that picklist values are returned in the user's language, which is necessary for organizations that have the translation workbench enabled.
Multi-language Solutions: [Salesforce Developer Guide](https://developer.salesforce.com/docs/atlas.en-us.soql_sosl.meta/soql_s

질문 # 67
A developer is tasked with ensuring that email addresses entered into the system for Contacts and for a custom object called survey Response c do not belong to a list of blocked domains.
The list of blocked domains is stored in a custom object for ease of maintenance by users. The survey Response c object is populated via a custom Visualforce page.
What is the optimal way to implement this?

A. Implement the logic in validation rules on the Contact and the Burvey Response_c Objects.
B. Implement the logic in the custom Visualforce page controller and call "that method from an Apex trigger on Contact.
C. Implement the logic in an Apex trigger on Contact and also implement the logic within the custom Visualforce page controller.
D. Implement the logic in a helper class that is called by an Apex trigger on Contact and from the custom Visualforce page controller.

정답：D

설명：
The optimal way to enforce the exclusion of blocked domains for email addresses entered into Contacts and a custom object is to use a helper class. The class can be called by an Apex trigger on the Contact object and from the controller of the custom Visualforce page used for the Survey Response. This centralizes the logic for maintainability and reusability.

질문 # 68
Users report that a button on a custom Lightning web component (LWC) is not saving the data they enter. The button looks to be clicked, but the LWC simply sits there, seemingly doing nothing.
What should the developer use to ensure error messages are properly displayed?

A. Use the Database method with a110rNone Set to false.
B. Add the <apex:messages/> tag to the component.
C. Add a try-catch block surrounding the DML statement.
D. Add JavaScript and HTML to display an error message.

정답：D

설명：
To ensure error messages are properly displayed in a Lightning web component, the developer should use JavaScript to handle errors in the component's client-side code and use HTML to display the message on the UI. This can be combined with Apex exception handling for server-side operations.

질문 # 69
A developer wrote the following method to find all the test accounts in the org:

What should be used to fix this failing test?

A. Test. fixsdSsarchReaulta [) method to set up expected data
B. Teat.loadData to set up expected data
C. @testsetup method to set up expected data
D. @isTest (SeeAllData=true) to access org data for the test

정답：A

설명：
https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_testing_SOSL.htm

질문 # 70
Which two best practices should the developer implement to optimize this code? Choose 2 answers

A. Use a collection for the DML statement.
B. Change the trigger context to after update, after insert
C. Query the Driving-Structure_C records outside of the loop
D. Remove the DML statement.

정답：A,C

설명：
To optimize the code in question, it's important to follow best practices that reduce the number of SOQL queries and DML statements within loops, as these can quickly consume governor limits and lead to inefficiencies. Option C is correct because using a collection to hold records and performing a single DML operation outside of loops reduces the number of DML operations, which is a best practice for bulkifying code in Salesforce. Option D is also correct because querying records outside of a loop prevents hitting SOQL governor limits and makes the code more efficient. Options A and B are not correct in the context provided, as there isn't enough information to determine if changing the trigger context is necessary, and removing the DML statement altogether may not be feasible if the logic requires data to be persisted.
Reference
Apex Best Practices: Apex Developer Guide Best Practices

질문 # 71
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