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Salesforce Plat-Dev-301 Exam Syllabus Topics:

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

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q142-Q147):

NEW QUESTION # 142
Given the following containment hierarchy:
What is the correct way to communicate the new value of a property named ''passthrough'' to my-parent-component if the property is defined within my-child-component?
A)
B)

C)

D)

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

Answer: C

Explanation:
To communicate a property change up a containment hierarchy in Lightning Web Components (LWC), the child component should dispatch a custom event with the detail of the change. The parent component listens for this event and handles it accordingly.
Option A is the correct method because it creates a new custom event with the detail property containing the new value of passthrough. This event is then dispatched, and the parent component can listen for this event to handle the updated value.
Options B, C, and D are incorrect because they either don't pass any data with the event or they don't use the detail object which is the standard way to pass data with custom events in LWC.
Lightning Web Components Developer Guide - Communicating with Events

NEW QUESTION # 143
How should a developer assert that a trigger with an asynchronous process has successfully run?

A. Create all test data, use future in the rest class, then perform assertions.
B. Create all test data in the test class, invoke Test.startTest{} and Test.etopTaat {} and then perform assertions.
C. Insert records into Salesforce, use seeAllData=true, then perform assertions.
D. Create all test data in the test class, use system. runs {} to invoke the trigger, then perform assertions.

Answer: B

Explanation:
Use Test.startTest() and Test.stopTest(). These methods ensure asynchronous code runs within test execution and allows for accurate assertions.

NEW QUESTION # 144
Which two best practices should the developer implement to optimize this code? Choose 2 answers

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

Answer: B,C

Explanation:
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

NEW QUESTION # 145
A company notices that their unit tests in a test class with many methods to create many records for prerequisite reference data are slow.
What can a developer to do address the issue?

A. Move the prerequisite reference data setup to the constructor for the test class.
B. Turn off triggers, flows, and validations when running tests.
C. Move the prerequisite reference data setup to a TestDataFactory and call that from each test method.
D. Move the prerequisite reference data setup to a @testSetup method in the test class.

Answer: D

Explanation:
@testSetup method improves test performance. It allows data sharing across test methods within a class, reducing redundant data creation.

NEW QUESTION # 146
A company wants to incorporate a third-party weh service to set the Address fields when an Account is inserted, if they have not already been set.
What is the optimal way to achieve this?

A. Create a Before Save Flow, execute a Queueable job from it, and make a callout from the Queusable job.
B. Create a Workflow Rule, execute a Queueable job from it, and make a callout from the Queueable job.
C. Create an Apex trigger, execute a Queueable job from it, and make a callout from the Queueable job.
D. Create a Process, execute a Quaueable job from it, and make a callout from the Queueable job.

Answer: C

Explanation:
To make a callout to set the Address fields when an Account is inserted without violating the Salesforce limit against callouts from triggers, a developer can use a trigger to execute a Queueable job. The Queueable job can then safely make the callout.

NEW QUESTION # 147
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