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Salesforce Plat-Dev-301 Exam Syllabus Topics:

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

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q22-Q27):

NEW QUESTION # 22
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. 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.
B. 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.
C. Modify the SOQL guery in the getAccountContacts method to include the MailingAddress field.
D. Extend the lightning-datatable component in the Lightning web component to include a column for the MailingAddress field.

Answer: B

Explanation:
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.

NEW QUESTION # 23
A company has a custom object, Order__c, that has a custom picklist field, Status__c, with values of `"New', `"In Progress', or `"Fulfilled' and a lookup field, Contact__c, to Contact.
Which SOQL query will return a unique list of all the Contact records that have no `"Fulfilled' Orders?

A. SELECT Id FROM Contact WHERE Id NOT IN (SELECT Id FROM Order__c WHERE Status__c = 'Fulfilled')
B. SELECT Contact__c FROM Order__c WHERE Id NOT IN (SELECT Id FROM Order__c Where Status__c = 'Fulfilled')
C. SELECT Contact__c FROM Order__c WHERE Status__c <> 'Fulfilled'
D. SELECT Id FROM Contact WHERE Id NOT IN (SELECT Contact__c FROM Order__c WHERE Status__c = 'Fulfilled')

Answer: D

Explanation:
The correct SOQL query to return a unique list of Contact records that have no 'Fulfilled' Orders is one that selects Ids from the Contact object where the Contact Id is not in the set of Contact Ids related to 'Fulfilled' Orders. This is done by a subquery that selects the Contact__c field from the Order__c records where the Status__c is 'Fulfilled'.

NEW QUESTION # 24
A developer gets an error saying 'Maximum Trigger Depth Exceeded.'
What is a possible reason to get this error message?

A. There are numerous DML operations in the trigger logic.
B. The SOQL governor limits are being hit.
C. A trigger is recursively invoked more than 16 times.
D. A flow trigger was included too many times.

Answer: C

Explanation:
The "Maximum Trigger Depth Exceeded" error message is typically caused by a trigger being recursively invoked too many times. Salesforce has a limit on the depth of trigger recursion to prevent infinite loops, which is 16 times.

NEW QUESTION # 25
A Visuzlforce page loads slowly due to the large amount of data it displays.
Which strategy can a developer use to improve the performance?

A. Use an <apex:actionPollar) in the page to load all of the data asynchronously.
B. Use Javascript to move data processing to the browser instead of the controller.
C. Use the transient keyword for the List variables used in the custom controller.
D. Use lazy loading to load the data on demand, instead of in the controller's constructor.

Answer: D

Explanation:
Lazy loading is a strategy to improve the performance of a Visualforce page that loads a large amount of data. By loading the data on demand, rather than in the controller's constructor, the initial page load is faster, and additional data is only loaded when necessary.

NEW QUESTION # 26
Consider the following code snippet:

As part of the deployment cycle, a developer creates the following test class:

When the test class runs, the assertion fails. Which change should the developer implement in the Apex test method to ensure the test method executes successfully? A)

B)

C)

D)

A. Option A
B. Option C
C. Option B
D. Option D

Answer: C

Explanation:
To ensure that test methods execute successfully and are able to verify the behavior of the code, it is important to set up the proper context and to make sure that the test covers the expected outcomes accurately.
Option B is correct because enclosing the method call within Test.startTest() and Test.stopTest() ensures that any asynchronous operations are completed before the assertions are made. This is crucial when the code being tested is expected to perform operations that may run after the initial transaction, such as future methods, queueable jobs, or batch operations.
Options A, C, and D are incorrect because they do not address the issue of ensuring that all operations are completed before the assertion is made. Option A incorrectly suggests modifying the test setup code, while Options C and D suggest changes that are not related to the test execution flow.
Salesforce Developer Documentation on Testing Best Practices: Apex Testing Best Practices

NEW QUESTION # 27
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