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Salesforce Plat-Dev-301 Exam Syllabus Topics:

Section	Weight	Objectives
Testing, Debugging, and Deployment	20%	- Deployment strategies, CI/CD, and change management - Advanced testing strategies and test frameworks - Debugging and error handling across layers
Logic, Process Automation, and Integration	27%	- Advanced Apex programming and transaction management - Asynchronous Apex: future, queueable, batch, scheduled - Complex business logic and automation design - REST/SOAP API, Platform Events, and external integrations
User Interface Development	20%	- Implement advanced Visualforce functionality - Build complex Lightning Web Components and Aura Components - Optimize UI performance and usability
Advanced Developer Fundamentals	15%	- Design and maintain scalable, reusable code - Work with localization, multi-currency, and global features - Apply security best practices in development
Performance and Data Management	18%	- Optimize queries and handle large data volumes - Governor limits optimization and best practices - Data modeling and complex data operations

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q190-Q195):

NEW QUESTION # 190
Universal Containers needs to integrate with their own, existing, internal custom web application. The web application accepts JSON payloads, resizes product images, and sends the resized images back to Salesforce.
What should the developer use to implement this integration?

A. A platform event that makes a callout to the web application
B. An Apex trigger that calls an @future method that allows callouts
C. A flow with an outbound message that contains a session ID
D. A flow that calls an @future method that allows callouts

Answer: B

Explanation:
In a scenario where an integration requires making a callout to an external web application, Apex is often used to perform callouts. The callout must be asynchronous when being made from a trigger because a callout cannot be made from a synchronous operation like a trigger due to the possibility of long-running transactions.
Option A (An Apex trigger that calls an @future method that allows callouts) is correct because it enables the trigger to perform an asynchronous callout to the external web application, which is necessary for sending JSON payloads and receiving the resized images.
Options B, C, and D do not fit the requirement as well as option A because platform events and flows are typically not used for making direct callouts to external systems in the context described.
Apex Developer Guide: Apex Web Services and Callouts

NEW QUESTION # 191
A Visualforce page contains an industry select list and displays a table of Accounts that have a matching value in their Industry field.

When a user changes the value in the industry select list, the table of Accounts should be automatically updated to show the Accounts associated with the selected industry, What is the optimal way to implement this?

A. Add an <apex:actionsupport> within the <apex:selectOptions>.
B. Add an <apex:actionFunction> within the <apex:selectOptions>.
C. Add an <apex:actionsupport> within the <apex:selecList>.
D. Add an <apex:actionFunction> within the <apax:selecList>.

Answer: C

Explanation:
The <apex:actionSupport> component is designed to be used with another component to provide AJAX support. When the value of the industry select list changes, the <apex:actionSupport> can trigger an AJAX request to the server, causing the page to rerender the table of Accounts with the matching industry. This process occurs without a full page refresh, providing a smoother user experience.
Visualforce Developer Guide

NEW QUESTION # 192
An Apex trigger and Apex class increment a counter, Edit __C, any time the Case is changed.

A)

B)

C)

D)

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

Answer: B

NEW QUESTION # 193
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. Extend the lightning-datatable component in the Lightning web component to include a column for the MailingAddress field.
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. 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.
D. Modify the SOQL guery in the getAccountContacts method to include 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 # 194
What are three reasons that a developer should write Jest tests for Lightning web components?
Choose 3 answers

A. To test how multiple components work together
B. To test basic user interaction
C. To verify that events fire when expected
D. To test a component's non-public properties.
E. To verify the DOM output of a component

Answer: B,D,E

Explanation:
Jest tests are essential for developing Lightning Web Components (LWC) because they allow developers to ensure the quality and correctness of their components in isolation from the rest of the application. Reason A is incorrect because testing non-public properties breaks encapsulation and is considered bad practice. B is correct because Jest tests can simulate user interactions with the component, such as clicking buttons or entering text, to ensure it behaves as expected. C is correct as well because Jest tests can confirm that the component renders the expected DOM output, which is crucial for ensuring that the HTML structure of the component is accurate. D is not the best choice since Jest is more suited for testing components in isolation rather than how multiple components interact; integration tests are more appropriate for that. Lastly, E is correct because Jest tests can verify that events are fired at the appropriate times, which is a critical part of the component's interaction with the rest of the application.
Reference
Jest Testing: Lightning Web Components Testing
Jest Testing Best Practices: Lightning Web Components Jest Best Practices

NEW QUESTION # 195
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