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Salesforce Plat-Dev-301 Exam Syllabus Topics:

Section	Objectives
Application Development	- Asynchronous processing 1. Scheduled Apex 2. Future methods and limits considerations 3. Batch Apex and Queueable Apex - Advanced Apex programming 1. Dynamic Apex and metadata-driven development 2. Exception handling and debugging strategies 3. Apex design patterns and best practices
Testing and Deployment	- Deployment lifecycle 1. Change sets and deployment tools 2. Version control and CI/CD concepts - Testing strategies 1. Test data creation and mocking 2. Code coverage and quality practices
Data Modeling and Management	- Advanced data modeling 1. Large data volume considerations 2. Complex relationships and schema design - Data access and security 1. Sharing rules and Apex-managed sharing 2. Security enforcement in Apex
Integration and APIs	- Platform events and messaging 1. Event-driven architecture 2. Change Data Capture concepts - External system integration 1. Callouts from Apex 2. REST and SOAP API usage

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q47-Q52):

NEW QUESTION # 47
A developer is creating a page in App Builder that will be used in the Salesforce mobile app.
Which two practices should the developer follow to ensure the page operates with optimal performance?
Choose 2 answers

A. Limit the number of Tabs and Accordion components.
B. Limit five visible components on the page.
C. Analyze the page with Performance Analysis for App Builder.
D. Limit 25 fields on the record detail page.

Answer: A,C

Explanation:
For mobile app pages in App Builder, best practices include limiting the number of heavy components like Tabs and Accordion because they can negatively impact performance due to increased client-side processing and data transfer. Also, using Performance Analysis in App Builder helps in identifying components that may slow down page performance and provides recommendations for improvements. Reference:
Optimize Performance in the Salesforce Mobile App
Lightning App Builder Performance Analysis

NEW QUESTION # 48
A developer is tasked with ensuring that email addresses entered into the system for Contacts and for a custom object called survey Response c do not belong to a list of blocked domains.
The list of blocked domains is stored in a custom object for ease of maintenance by users. The survey Response c object is populated via a custom Visualforce page.
What is the optimal way to implement this?

A. Implement the logic in a helper class that is called by an Apex trigger on Contact and from the custom Visualforce page controller.
B. Implement the logic in validation rules on the Contact and the Burvey Response_c Objects.
C. Implement the logic in an Apex trigger on Contact and also implement the logic within the custom Visualforce page controller.
D. Implement the logic in the custom Visualforce page controller and call "that method from an Apex trigger on Contact.

Answer: A

Explanation:
The optimal way to enforce the exclusion of blocked domains for email addresses entered into Contacts and a custom object is to use a helper class. The class can be called by an Apex trigger on the Contact object and from the controller of the custom Visualforce page used for the Survey Response. This centralizes the logic for maintainability and reusability.

NEW QUESTION # 49
A company has many different unit test methods that create Account records as part of their data setup. A new required field was added to the Account and now all of the unit tests fail.
What is the optimal way for a developer to fix the issue?

A. Create a TestDataFactory class that serves as the single place to create Accounts for unit tests and set the required field there.
B. Change the required field to be a validation rule that excludes the System Administrator profile.
C. Add the required field to the data setup for all of the unit tests.
D. Add a before insert trigger on Account to set the value of the required field,

Answer: A

Explanation:
The optimal way to fix the failing unit tests after adding a new required field to the Account object is to create a TestDataFactory class that serves as a centralized place to create Accounts for unit tests. This class would include the new required field, ensuring that all unit tests have the necessary data setup.

NEW QUESTION # 50
Which two queries are selective SOQL queries and can be used for a large data set of 200,000 Account records?
Choose 2 answers

A. SELECT Id FROM Account WHERE II IK (List of Account Ida)
B. SELECT Id FRCM Account WHERE Name != ' '
C. SELECT Id FRCM Account WHEP Name IN (List of Names) AND Customer_Number_c= 'ValueA
D. SELECT Id FROM Account WHERE Name LIKE '!-NULL

Answer: B,C

Explanation:
Selective queries in SOQL are optimized for performance. Query B is selective because it filters out empty names, which are likely to be less in number. Query C is selective if the list of names is small, and 'Customer_Number_c' is indexed or can be used as an external ID field. Working with Very Large SOQL Queries

NEW QUESTION # 51
A developer is building a Lightning web component that searches
for Contacts. The component must communicate the search
results to other unrelated Lightning web components, that are in
different DOM trees, when the search completes.
What should the developer do to implement the communication?

A. Publish a message on a message channel.
B. Publish an event on an event channel.
C. Fire a custom component event.
D. Fire an application event.

Answer: A

Explanation:
For communication between unrelated Lightning web components that are in different DOM trees, the most suitable approach is to use the Lightning Message Service (LMS). This service allows components to communicate with each other using a message channel, which is particularly useful when the components are not in the same containment hierarchy. By publishing and subscribing to messages on a message channel, components can exchange data and notifications, which is ideal for the scenario described.
Lightning Web Components Developer Guide - Communicate Across the DOM with Lightning Message Service

NEW QUESTION # 52
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