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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Performance and Data Management | 18% | - Optimize queries and handle large data volumes - Data modeling and complex data operations - Governor limits optimization and best practices |
| Topic 2: Advanced Developer Fundamentals | 15% | - Design and maintain scalable, reusable code - Apply security best practices in development - Work with localization, multi-currency, and global features |
| Topic 3: User Interface Development | 20% | - Optimize UI performance and usability - Implement advanced Visualforce functionality - Build complex Lightning Web Components and Aura Components |
| Topic 4: Testing, Debugging, and Deployment | 20% | - Advanced testing strategies and test frameworks - Debugging and error handling across layers - Deployment strategies, CI/CD, and change management |
| Topic 5: Logic, Process Automation, and Integration | 27% | - Asynchronous Apex: future, queueable, batch, scheduled - REST/SOAP API, Platform Events, and external integrations - Advanced Apex programming and transaction management - Complex business logic and automation design |
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NEW QUESTION # 104
A developer is working on an integration between Salestorce and an external system. The integration requires sending a large amount of data to the external systern, which can cause long response times and timeouts.
To optimize the performance and avoid timeouts, which technique should be used?
Answer: A
Explanation:
Implementing an asynchronous callout using the Continuation class is the optimal solution to handle long response times and avoid timeouts in Salesforce. It allows the Apex code to make a long-running request to an external service and free up the thread to serve other requests.
NEW QUESTION # 105
A developer creates an application event that has triggered an infinite loop.
What may have caused this problem?
Answer: A
Explanation:
The infinite loop in the application event could be caused by multiple handlers registered in the project. If the event is fired and then handled in such a way that the handling leads to the event being fired again, this can create a loop. Care must be taken to ensure that the handling of the event does not re-trigger the same event unintentionally.
NEW QUESTION # 106
A developer gets an error saying 'Maximum Trigger Depth Exceeded.'
What is a possible reason to get this error message?
Answer: C
Explanation:
The "Maximum Trigger Depth Exceeded" error message is typically caused by a trigger being recursively invoked too many times. Salesforce has a limit on the depth of trigger recursion to prevent infinite loops, which is 16 times.
NEW QUESTION # 107
As part of point-to-point integration, a developer must call an external web service which, due to high demand, takes a long time to provide a response. As part of the request, the developer must collect key Inputs from the end user before making the callout. Which two elements should the developer use to Implement these business requirements?
Choose 2 answers
Answer: A,D
Explanation:
For implementing business requirements that involve collecting key inputs from the end user before making a long-running callout, a combination of a Lightning web component and an Apex method that returns a Continuation object is ideal. The Lightning web component can be used to build a user-friendly interface to collect the inputs, and the Continuation object in Apex allows for managing the callout in an asynchronous way. This pattern prevents the user interface from freezing and provides a better user experience by allowing the callout to run in the background.
Apex Developer Guide - Asynchronous Callouts to Long-Running Web Services Lightning Web Components Developer Guide
NEW QUESTION # 108
What are three reasons that a developer should write Jest tests for Lightning web components?
Choose 3 answers
Answer: A,C,D
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 # 109
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