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Salesforce Plat-Dev-301 Exam Syllabus Topics:

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

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q139-Q144):

NEW QUESTION # 139
Consider the controller code below that is called from an Aura component and returns data wrapped in a class.

The developer verified that the queries return a single record each and there is error handling in the Aura component, but the component is not getting anything back when calling the controller getSemeData. 'What is wrong?

A. Instances of Apex classes, such as MyDatsWrapper, cannot be returned to a Lightning component.
B. The member's Name and option should not have getter and setter.
C. The member's Name and option should not be declared public.
D. The member's Kame and option of the class MyDataWrapper should be annotated with @AuraEnabled also.

Answer: D

Explanation:
For the data to be passed back to the Aura component, all properties of the Apex class that are intended to be accessed from the component need to be annotated with @AuraEnabled. Without this annotation, the Aura framework cannot serialize the properties to send them to the front end.

NEW QUESTION # 140
Which tag should a developer use to display different text while an <apex:commandButton> is Processing an action?

A. <apex:actionStatus>
B. <apex:actionSupparts
C. <apex:pageMes sagas
D. <apex:actionPaller>

Answer: A

Explanation:
The <apex:actionStatus> tag in Visualforce is used to display the status of an AJAX request, such as showing different text while a command button is processing an action.

NEW QUESTION # 141
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. Add system.debug() statements to the code and use the Developer Console logs to trace the code.
B. Run the Apex Test Classes for the Apex trigger to ensure the code still has sufficient code coverage.
C. Disable all flows, and then re-enable them one at at time to see which one causes the error.
D. Set up debug logging for every Sales Rep, then monitor the logs for errors and exceptions,

Answer: A

Explanation:
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.

NEW QUESTION # 142
A developer is working on an integration between Salestorce and an external system. The integration requires sending a large amount of data to the external systern, which can cause long response times and timeouts.
To optimize the performance and avoid timeouts, which technique should be used?

A. Increase the timeout limit in the callout options,
B. Use the @future annotation to make the callout asynchronous.
C. Use a chained batch Apex to split the data into smaller batches.
D. Implement an asynchronous callout using the Continuation class,

Answer: D

Explanation:
Implementing an asynchronous callout using the Continuation class is the optimal solution to handle long response times and avoid timeouts in Salesforce. It allows the Apex code to make a long-running request to an external service and free up the thread to serve other requests.

NEW QUESTION # 143
A business requires that every parent record must have a child record. A developer writes an Apex method with two DML statements to insert a parent record and a child record.
A validation rule blocks child records from being created. The method uses a try/catch block to handle the DML exception.
What should the developer do to ensure the parent always has a child record?

A. Set a database savepoint to rollback if there are errors.
B. Use Catabase.inserc() and set the all = parameter to true,
C. Delete the parent record in the catch statement when an error occurs on the child record DML operation.
D. Use addExror() on the parent record if an error occurs on the child record.

Answer: A

Explanation:
By setting a savepoint before the DML operations and rolling back to that savepoint in the event of an exception, the developer can ensure that the parent record is not committed without a corresponding child record.
Apex Developer Guide

NEW QUESTION # 144
......

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