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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Testing, Debugging, and Deployment | 20% | - Advanced testing strategies and test frameworks - Deployment strategies, CI/CD, and change management - Debugging and error handling across layers |
| Topic 2: Advanced Developer Fundamentals | 15% | - Work with localization, multi-currency, and global features - Design and maintain scalable, reusable code - Apply security best practices in development |
| Topic 3: 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 4: User Interface Development | 20% | - Optimize UI performance and usability - Implement advanced Visualforce functionality - Build complex Lightning Web Components and Aura Components |
| Topic 5: Logic, Process Automation, and Integration | 27% | - Advanced Apex programming and transaction management - Complex business logic and automation design - Asynchronous Apex: future, queueable, batch, scheduled - REST/SOAP API, Platform Events, and external integrations |
>> Plat-Dev-301 Dumps Questions <<
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NEW QUESTION # 25
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: C
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 # 26
A developer has working business logic code, but sees the following error in the test class:
You have uncommitted work pending. Please commit or rollback before calling out.
What is a possible solution?
Answer: C
Explanation:
The error "You have uncommitted work pending. Please commit or rollback before calling out" usually indicates that DML operations (like insert, update, delete) are being performed before a callout in a test context. This is not allowed because Salesforce does not support this sequence of operations in a single transaction. However, the use of seeAllData=true is generally not a recommended practice and does not address the core issue of mixed DML and callouts in tests. The correct solution is to use a mocking framework to simulate the callout response. By using Test.setMock(), developers can avoid performing actual callouts in test methods, thus bypassing the uncommitted work error.
Apex Developer Guide - Testing HTTP Callouts
Apex Developer Guide - Isolation of Test Data from Organization Data in Unit Tests
NEW QUESTION # 27
Refer to the following code snippet:
A developer created a JavaScript function as part of a Lightning web component (LWC) that surfaces information about Leads by wire calling geyFetchLeadList whencertain criteria are met. Which three changes should the developer implement in the Apex class above to ensure the LWC can display data efficiently while preserving security? Choose 3 answers
Answer: A,C,D
Explanation:
The Apex class needs to have the method annotated with @AuraEnabled to expose it to the LWC. The 'with sharing' keyword ensures that the data access is enforced according to the user's permissions. @AuraEnabled(cacheable=true) allows client-side caching for improved performance.
@AuraEnabled Annotation: Apex Developer Guide
Enforcing Sharing Rules: Apex Developer Guide
NEW QUESTION # 28
A developer created the following test method:
The developer org has five accounts where the name starts with "Test". The developer executes this test in the Developer Console. After the test code runs, which statement is true?
Answer: A
Explanation:
Since the SeeAllData=true annotation is used, the test class does not have its own test data and is relying on the data in the org. The org already has accounts with the name starting with "Test", so the assertion that no accounts should exist after the deletion will fail because the test method only deletes the account that was created within its scope.
Apex Developer Guide
NEW QUESTION # 29
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,C
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 # 30
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