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Salesforce Plat-Dev-301 Exam Syllabus Topics:

Section	Weight	Objectives
Testing, Debugging, and Deployment	20%	- Debugging and error handling across layers - Advanced testing strategies and test frameworks - Deployment strategies, CI/CD, and change management
User Interface Development	20%	- Optimize UI performance and usability - Build complex Lightning Web Components and Aura Components - Implement advanced Visualforce functionality
Performance and Data Management	18%	- Optimize queries and handle large data volumes - Governor limits optimization and best practices - Data modeling and complex data operations
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 - Advanced Apex programming and transaction management - Complex business logic and automation design - Asynchronous Apex: future, queueable, batch, scheduled

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q168-Q173):

NEW QUESTION # 168
Consider the below trigger intended to assign the Account to the manager of the Account's region:

Which two changes should a developer make in this trigger to adhere to best practices? Choose 2 answers A)

B)

C)

D)

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

Answer: B,C

Explanation:
The best practices for writing triggers in Salesforce include bulkifying your code to handle multiple records efficiently and reducing the number of SOQL queries, especially within loops, to avoid hitting governor limits.
Option B is correct because moving the SOQL query outside of the for loop is essential to bulkify the trigger. Performing a query within a loop can cause a SOQL governor limit to be reached if the trigger is processing many records. The best practice is to collect all necessary data before the loop starts and then process it within the loop.
Option C is correct as well, because using a Map to cache the results of a SOQL query by Id is another way to bulkify the code. This allows you to query all the necessary data once and then access it efficiently in memory, avoiding repeated queries.
Option A is incorrect because adding isExecuting before the update doesn't address any best practices related to bulkification or SOQL query optimization.
Option D is incorrect because the last line should not be removed if the developer intends to perform DML on the accountList. However, this line should be outside of the loop and is unnecessary if the trigger context is 'before insert' or 'before update', since in those contexts, changes to records in Trigger.new are implicitly saved without the need for explicit DML.
Apex Developer Guide on Triggers: Triggers and Order of Execution
Salesforce Developer Blog on Trigger Best Practices: Trigger Best Practices

NEW QUESTION # 169
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. Trigger.new does not change after a field update.
B. After triggers fire before workflow rules.
C. After triggers are not fired after field updates.
D. Trigger.old does not contain the updated value of the count field.

Answer: D

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

NEW QUESTION # 170
What is the best practice to initialize a Vizualforce page in a test class?

A. Use Test. setCurrentPage MyTestPags;
B. Use Test. setCurrentPage (Page. MyTeatPage);
C. Use Test. currantPage .getParamatars put (MyTaestPaga) ;
D. Use controller. currentPage. setPage (MyTastfage) ;

Answer: B

Explanation:
Test.setCurrentPage(Page.MyTestPage) is used to set the context to a Visualforce page in tests, allowing you to simulate a page request in a test method.

NEW QUESTION # 171
A developer has working business logic code, but sees the following error in the test class:
You have uncommitted work pending. Please commit or rollback before calling out.
What is a possible solution?

A. Call support for help with the target endpoint, as It is likely an external code error.
B. Use mast. T=RunningTes={} before making the callout to bypass it in test execution,
C. Rewrite the business logic and test classes with @Testvisible set on the callout.
D. Set seeAllData to true the top of the test class, since the code does not fall in practice.

Answer: D

Explanation:
The error "You have uncommitted work pending. Please commit or rollback before calling out" usually indicates that DML operations (like insert, update, delete) are being performed before a callout in a test context. This is not allowed because Salesforce does not support this sequence of operations in a single transaction. However, the use of seeAllData=true is generally not a recommended practice and does not address the core issue of mixed DML and callouts in tests. The correct solution is to use a mocking framework to simulate the callout response. By using Test.setMock(), developers can avoid performing actual callouts in test methods, thus bypassing the uncommitted work error.
Apex Developer Guide - Testing HTTP Callouts
Apex Developer Guide - Isolation of Test Data from Organization Data in Unit Tests

NEW QUESTION # 172
A developer is writing a Jest test for a Lightning web component that conditionally displays child components based on a user's checkbox selections.
What should the developer do to properly test that the correct components display and hide for each scenario?

A. Create a new describe block for each test.
B. Reset the DOM after each test with the after Each() method.
C. Create a new jsdom instance for each test.
D. Add a teardown block to reset the DOM after each test.

Answer: B

Explanation:
To ensure that the DOM is clean before each test runs, the developer should use the afterEach() method to reset it. This is part of the setup and teardown process in Jest tests, which helps to avoid state leakage between tests. Reference:
Jest Globals afterEach

NEW QUESTION # 173
......

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