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| Section | Objectives |
|---|---|
| Topic 1: Testing and Deployment | - Testing strategies
|
| Topic 2: Application Development | - Asynchronous processing
|
| Topic 3: Data Modeling and Management | - Advanced data modeling
|
| Topic 4: Integration and APIs | - External system integration
|
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NEW QUESTION # 131
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 # 132
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 # 133
A company has reference data stored in multiple custom metadata records that represent default information and delete behavior for certain geographic regions.
When a contact is inserted, the default information should be set on the contact from the custom metadata records based on the contact's address information.
Additionally, if a user attempts to delete a contact that belongs to a flagged region, the user must get an error message.
Depending on company personnel resources, what are two ways to automate this?
Choose 2 answers
Answer: A,B
Explanation:
To automate the process based on the contact's address information and prevent deletion from flagged regions:
Flow Builder: Can be used to set default information on records when they are created.
Apex Trigger: Allows for complex logic to be executed before or after data manipulation operations, including insert and delete. It can be used to enforce rules such as preventing deletion.
Flow Builder: Salesforce Help Article
Apex Triggers: Apex Developer Guide
NEW QUESTION # 134
Which two best practices should the developer implement to optimize this code? Choose 2 answers
Answer: C,D
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 # 135
A company uses an external system to manage its custom account territory assignments. Every quarter, millions of Accounts may be updated in Salesforce with new Owners when the territory assignments are completed in the external system.
What is the optimal way to update the Accounts from the external system?
Answer: D
NEW QUESTION # 136
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