Plat-Dev-301시험대비인증공부, Plat-Dev-301완벽한덤프문제

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Salesforce Plat-Dev-301 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: User Interface	18%	- Lightning Data Service - Aura Components - Visualforce advanced controllers - Lightning Web Components (LWC) advanced features
Topic 2: Testing, Debugging, and Deployment	15%	- Apex unit testing best practices - Deployment tools (SFDX, Metadata API) - Debugging and performance profiling - Test data strategies and mocking
Topic 3: Architecture	18%	- Namespace and package management - Design patterns and Apex trigger frameworks - Apex Enterprise Patterns - Governor limits and bulkification
Topic 4: Integration	15%	- External Services and Connect REST API - REST and SOAP web services (Apex callouts) - Platform Events and Change Data Capture - Named Credentials and authentication
Topic 5: Logic and Process Automation	22%	- Advanced Apex programming - Invocable Actions and Platform Events - Asynchronous Apex (Batch, Queueable, Future, Scheduled) - Dynamic Apex and SOQL/SOSL
Topic 6: Data Modeling	12%	- Large data volumes considerations - Advanced object relationships and data modeling - External objects and data sources

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Plat-Dev-301 덤프데모, Plat-Dev-301시험응시자료

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최신 Salesforce Developer Plat-Dev-301 무료샘플문제 (Q138-Q143):

질문 # 138
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. Set up debug logging for every Sales Rep, then monitor the logs for errors and exceptions,
B. Add system.debug() statements to the code and use the Developer Console logs to trace the code.
C. Run the Apex Test Classes for the Apex trigger to ensure the code still has sufficient code coverage.
D. Disable all flows, and then re-enable them one at at time to see which one causes the error.

정답：B

설명：
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.

질문 # 139
An Apex class does not achieve expected code coverage. The testsetup method explicitly calls a method In the Apex class..
How can the developer generate the code coverage?

A. Use system.assert() in testSetup to verify the values are being returned.
B. Verify the user has permissions passing a user into System,.runds().
C. Call the Apex class method from a testsetup Instead of the testsetup methed.
D. Add @testvisible to the method in the class the developer is testing.

정답：D

설명：
When an Apex class does not achieve the expected code coverage, it suggests that the test methods are not executing parts of the class. The @testvisible annotation can be used to increase code coverage by allowing test methods to access private or protected members of another class. This enables the test method to call methods that may not be directly accessible, but it is not a direct means to generate code coverage. The code coverage is actually achieved when the test methods execute the code within these methods. Therefore, to properly generate code coverage, the developer must ensure that the test methods call the relevant portions of the code that need to be covered. The use of @testvisible can facilitate this process by making otherwise inaccessible code available for testing.
Apex Developer Guide - Testing Best Practices
Apex Developer Guide - @testVisible Annotation

질문 # 140
There are user complaints about slow render times of a custom data table within a Visualforce page that loads thousands of Account records at once.
What can a developer do to help alleviate such issues?

A. Use the transient keyword in the Apex code when querying the Account records.
B. Use JavaScript remoting to query the accounts.
C. Upload a third-party data table library as a static resource.
D. Use the standard Account List controller and implement pagination.

정답：D

설명：
Implementing pagination using the standard Account List controller in Visualforce is a proven method to improve performance when displaying large sets of data. Pagination allows only a subset of records to be fetched and displayed at a time, thereby reducing the load time of the page.

질문 # 141
After a platform event is defined in a Salesforce org,events can be published via which mechanism?

A. Internal Apps can use entitlement processes.
B. External Apps use an API Co publish event messages.
C. Internal Apps can use outbound messages.
D. External Apps require the standard Streaming API.

정답：B

설명：
Platform events in Salesforce can be published using a variety of mechanisms, including from external applications through the Salesforce APIs.
Option A is correct because external applications can use Salesforce APIs such as the REST API or the SOAP API to publish events to a platform event in Salesforce.
Options B, C, and D describe mechanisms that are not used for publishing platform events. Entitlement processes are for setting up and tracking service contracts, the standard Streaming API is for subscribing to events not publishing them, and outbound messages are a workflow action used to send information to external services, not for publishing platform events.
Salesforce Developer Documentation - Platform Events

질문 # 142
A developer wrote a trigger on Opportunity that will update a custom Last Sold Date field on the Opportunity's Account whenever an Opportunity is closed. In the test class for the trigger, the assertion to validate the Last Sold Date field fails.
What might be causing the failed assertion?

A. The test class has not implemented seealldata=true in the test method.
B. The test class has not defined an Account owner when inserting the test data.
C. The test class is not using System. runs () to run tests as a Salesforce administrator.
D. The test class has not re-queried the Account record after updating the Opportunity.

정답：D

설명：
The test class may not be re-querying the Account record after updating the Opportunity, which is necessary to verify the updated field values. If the test does not query the database to get the most recent data after the trigger runs, it will not see the changes made by the trigger.

질문 # 143
......

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