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| Section | Objectives |
|---|---|
| Application Development | - Asynchronous processing
|
| Integration and APIs | - Platform events and messaging
|
| Data Modeling and Management | - Advanced data modeling
|
| Testing and Deployment | - Deployment lifecycle
|
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NEW QUESTION # 71
Consider the following code snippet:
The Apex method is executed in an environment with a large data volume count for Accounts, and the query is performing poorly. Which technique should the developer implement to ensure the query performs optimally, while preserving the entire result set?
Answer: C
Explanation:
When dealing with large data volumes in Salesforce and ensuring optimal performance for queries, it's important to choose an approach that both handles the data volume efficiently and retrieves the complete result set.
Option D is correct because using the Database.QueryLocator method is a best practice for handling large data volumes. It is typically used with batch Apex, which can process records in batches, thus reducing the likelihood of hitting governor limits. It's designed to handle very large data sets that would otherwise exceed normal SOQL query limits.
Option A is incorrect because creating a formula field doesn't improve the performance of the query. It simply creates a new field that combines existing data, but it does not inherently optimize the query execution.
Option B is incorrect because breaking down the query into two parts and joining them in Apex could potentially be less efficient and would require additional code to manage the combined result sets. This approach does not leverage the built-in Salesforce features designed to handle large data volumes.
Option C is incorrect because the @Future annotation makes the method execute asynchronously, but it does not help with query performance or large data volume management.
s:
Salesforce Documentation on Working with Very Large SOQL Queries: Working with Very Large SOQL Queries Salesforce Documentation on Using Batch Apex: Using Batch Apex
NEW QUESTION # 72
As part of a custom interface, a developer team creates various new Lightning web components. Each of the components handles errors using toast messages. When the development is complete, all the components are added to the same Lightning page.
During acceptance testing, users complain about the long chain of toast messages that display when errors occur loading the components.
Which two techniques should the developer implement to improve the user experience?
Choose 2 answers
Answer: A,D
Explanation:
The scenario describes a common issue when multiple components are used on the same Lightning page and each component manages its error handling independently, leading to a "long chain of toast messages" which can be overwhelming for users.
To improve user experience, the developers can implement the following techniques:
A . Use a Lightning web component to aggregate and display all errors: This method involves creating a centralized component responsible for handling all error messages. This component would receive error notifications from other components and then display them in a user-friendly manner. The benefit of this approach is that it provides a single, consistent interface for error messages, reducing the clutter and confusion that can be caused by multiple toasts.
D . Use public properties on each component to display the error messages: By using public properties, components can expose their error states to a parent or orchestrating component, which can then display these errors in a single, consolidated way. This avoids the issue of multiple toast notifications and allows for a more integrated error handling experience.
The other options presented are less ideal:
B . Using the window.alert() method is not recommended in a professional Salesforce environment as it is considered a disruptive way to show errors and does not align with the Salesforce Lightning design system.
C . Using a <template> tag to display in-place error messages could be a viable option for displaying error messages within the component itself, but it does not address the issue of multiple errors stacking up from different components as described in the scenario.
For building a centralized error handling component: Lightning Web Components Developer Guide - Error Handling For implementing public properties: Lightning Web Components Developer Guide - Public Properties
NEW QUESTION # 73
A developer needs to store variables to control the style and behavior of a Lightning Web Component.
Which feature can be used to ensure that the variables are testable in both Production and all Sandboxes?
Answer: B
Explanation:
Custom metadata types are the best feature for storing variables that control style and behavior of a Lightning Web Component. Unlike custom settings, custom metadata is deployable and testable in both Production and all Sandboxes.
NEW QUESTION # 74
Universal Containers develops a Salesforce application that requires frequent interaction with an external REST API.
To avoid duplicating code and improve maintainability, how should they implement the APL integration for code reuse?
Answer: A
Explanation:
Creating a reusable Apex class for API integration allows for code encapsulation and maintainability. This class can then be invoked from any other Apex class that requires interaction with the API, preventing code duplication.
NEW QUESTION # 75
Consider the above 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?
Answer: A,D
Explanation:
Moving the SOQL query outside the loop prevents it from being executed multiple times, which can lead to hitting governor limits. The last line updating the accountList is indeed needed to save the changes made to the Account records, so removing it is not recommended. Instead, the query should be moved outside the loop and records should be collected in a map for efficiency, which is not one of the provided options. Reference:
Apex Developer Guide - Best Practices for Apex
NEW QUESTION # 76
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