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Salesforce Plat-Dev-301 Exam Syllabus Topics:

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

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q16-Q21):

NEW QUESTION # 16
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:actionsupport> within the <apex:selecList>.
C. Add an <apex:actionFunction> within the <apex:selectOptions>.
D. Add an <apex:actionFunction> within the <apax:selecList>.

Answer: B

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 # 17
Consider the following code snippet:

How should the <e-orders> component communicate to the <c-selected-orders component that an order has been selected by the user?

A. Create and fire an application event.
B. Create and dispatch a custom event,
C. Create and fire a component event.
D. Create and fire a standard DOM event.

Answer: B

Explanation:
Create and dispatch a custom event. This approach allows LWC components to communicate effectively, maintaining component encapsulation and reusability.

NEW QUESTION # 18
What are three reasons that a developer should write Jest tests for Lightning web components?
Choose 3 answers

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

Answer: A,B,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 # 19
A Salesforce org has more than 50,000 contacts. A new business process requires a calculation that aggregates data from all of these contact records. This calculation needs to run once a day after business hours.
which two steps should a developer take to accomplish this?
Choose 2 answers
A)

B)

C)

D)

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

Answer: A,B

Explanation:
When dealing with large datasets and the need to perform complex calculations or data aggregation, batch Apex and scheduling are typically used to efficiently process records in batches and to execute the process during off-peak hours.
Option B is correct because using the @future annotation allows you to run methods in the background, but it is not suitable for operations that need to process more than 50,000 records, which is the governor limit for future methods.
Option C is correct because implementing the Schedulable interface allows you to schedule the class to run at specified times, such as after business hours, which is a requirement for this scenario.
Option A is incorrect because Queueable is typically used for chaining jobs and handling asynchronous processing of individual transactions, not for processing large datasets at scheduled times.
Option D is incorrect because the Database.Batchable interface is what's needed for processing large datasets, not Database.Stateful. The Database.Stateful interface is used to maintain state across batch job transactions.
Salesforce Developer Documentation on Using Batch Apex: Using Batch Apex Salesforce Developer Documentation on Scheduling Apex: Scheduling Apex

NEW QUESTION # 20
Which technique can run custom logic when a Lightning web component is loaded?

A. Use the randersd loack { } method.
B. Use the connectedCallback { } method.
C. Call 52. engqueusiction and pass in the method to call.
D. Use an <aura:handler> init event to call a function.

Answer: B

Explanation:
The connectedCallback() lifecycle hook in Lightning Web Components (LWC) is used to perform logic after a component is inserted into the DOM, making it the ideal place to execute custom logic when the component is loaded.

NEW QUESTION # 21
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