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| Section | Weight | Objectives |
|---|---|---|
| User Interface | 18% | - Aura Components - Visualforce advanced controllers - Lightning Web Components (LWC) advanced features - Lightning Data Service |
| Integration | 15% | - REST and SOAP web services (Apex callouts) - Platform Events and Change Data Capture - Named Credentials and authentication - External Services and Connect REST API |
| Data Modeling | 12% | - Advanced object relationships and data modeling - External objects and data sources - Large data volumes considerations |
| Testing, Debugging, and Deployment | 15% | - Debugging and performance profiling - Apex unit testing best practices - Deployment tools (SFDX, Metadata API) - Test data strategies and mocking |
| Architecture | 18% | - Design patterns and Apex trigger frameworks - Apex Enterprise Patterns - Governor limits and bulkification - Namespace and package management |
| Logic and Process Automation | 22% | - Advanced Apex programming - Invocable Actions and Platform Events - Asynchronous Apex (Batch, Queueable, Future, Scheduled) - Dynamic Apex and SOQL/SOSL |
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NEW QUESTION # 107
An Apex class does not achieve expected code coverage. The testsetup method explicitly calls a method In the Apex class..
How can the developer generate the code coverage?
Answer: C
Explanation:
When an Apex class does not achieve the expected code coverage, it suggests that the test methods are not executing parts of the class. The @testvisible annotation can be used to increase code coverage by allowing test methods to access private or protected members of another class. This enables the test method to call methods that may not be directly accessible, but it is not a direct means to generate code coverage. The code coverage is actually achieved when the test methods execute the code within these methods. Therefore, to properly generate code coverage, the developer must ensure that the test methods call the relevant portions of the code that need to be covered. The use of @testvisible can facilitate this process by making otherwise inaccessible code available for testing.
Apex Developer Guide - Testing Best Practices
Apex Developer Guide - @testVisible Annotation
NEW QUESTION # 108
Which three approaches should a developer implement to obtain the best performance for data retrieval when building a Lightning web component? Choose 3 answers
Answer: A,B,D
Explanation:
Lazy loading improves performance by loading data only when needed.
Lightning Data Service (LDS) handles data operations and caching efficiently.
Using {Cacheable=true} on Apex methods enables the Lightning Component framework to cache the method's return value, reducing server round-trips for the same data.
Lightning Web Components Developer Guide
NEW QUESTION # 109
Given the following containment hierarchy:
What is the correct way to communicate the new value of a property named ''passthrough'' to my-parent-component if the property is defined within my-child-component?
A)
B)
C)
D)
Answer: C
Explanation:
To communicate a property change up a containment hierarchy in Lightning Web Components (LWC), the child component should dispatch a custom event with the detail of the change. The parent component listens for this event and handles it accordingly.
Option A is the correct method because it creates a new custom event with the detail property containing the new value of passthrough. This event is then dispatched, and the parent component can listen for this event to handle the updated value.
Options B, C, and D are incorrect because they either don't pass any data with the event or they don't use the detail object which is the standard way to pass data with custom events in LWC.
Lightning Web Components Developer Guide - Communicating with Events
NEW QUESTION # 110
Refer to the Aura component below:
A developer receives complaints that the component loads slowly. Which change can the developer implement to make the component perform faster?
Answer: C
Explanation:
To improve the performance of an Aura component that is loading slowly, the developer can make the following change:
Lightning Components Performance Best Practices: Improve Performance
D). Change the default for showContactInfo to "False": By setting the default value of showContactInfo to False, the component does not fetch or render the contact information by default, which can reduce the initial load time. The information can be fetched and displayed later based on user action or other triggers.
NEW QUESTION # 111
A developer created a Lightning web component for the Account record page that displays the five most recently contacted Contacts for an Account. The Apex method, Contacts, returns a list of Contacts and will be wired to a property in the component.
Which two lines must change in the above code to make the Apex method able to be wired? Choose 2 answers
Answer: A,B
Explanation:
To make an Apex method callable from a Lightning Web Component, you need to annotate the method with @AuraEnabled and mark it as cacheable if it's only retrieving data without modifying it. Additionally, the method must be public to be accessible from the component.
Line 04: Needs @AuraEnabled(cacheable=true) to allow the method to be called from the Lightning Web Component and indicate that the method doesn't modify any data, making it suitable for caching.
Line 09: The method getFiveMostRecent should not be private because private methods cannot be called from a Lightning Web Component. Changing it to public (or default, which is equivalent to public within the same namespace) is required.
Lightning Web Components and Salesforce Data: Developer Documentation
@AuraEnabled Annotation: Apex Developer Guide
NEW QUESTION # 112
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