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| Section | Weight | Objectives |
|---|---|---|
| Performance | 12% | - Implement bulkify patterns - Optimize Apex and SOQL queries - Use caching mechanisms (Platform Cache, View State) - Identify and resolve performance bottlenecks |
| Testing and Debugging | 14% | - Analyze debug logs and resolve issues - Implement mock implementations for testing - Write Apex test classes with proper coverage - Use Developer Console and debugging tools |
| Apex Programming | 18% | - Use asynchronous Apex (future methods, queueable, batch) - Implement best practices for trigger logic - Handle exceptions and implement error handling - Design and implement integration patterns - Write and execute Apex triggers |
| Lightning Component Framework | 14% | - Use @track decorator and reactive properties correctly - Use component events and application events appropriately - Use Lightning Data Service to perform CRUD operations - Debug Lightning component issues using browser developer tools - Implement inheritance using base components |
| Salesforce Platform Fundamentals | 14% | - Understand the order of execution - Understand Salesforce architecture and Governor Limits - Implement sharing and access control - Use Process Builder and Flow appropriately |
| Data Modeling and Management | 14% | - Implement custom metadata and custom settings - Design complex data models with relationships - Use schema builder and relationship queries - Handle large data volumes with indexing and partitioning |
| Integration | 14% | - Use Named Credentials and External Data Sources - Implement outbound messaging and callouts - Handle integration errors and retry logic - Implement OAuth 2.0 authentication flows - Use REST API and SOAP API in Apex |
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NEW QUESTION # 77
A developer created an Apex class that updates an Account based on input from a Lightning web component that Is used to register an Account. The update to the Account should only be made if it has not already been registered.
What should the developer do to ensure that users do not overwrite each other's updates to the same Account if they make updates at the same time?
Answer: C
Explanation:
When multiple users are updating the same record at the same time, there is a risk of overwriting each other's changes. Salesforce provides a mechanism called 'record locking' to prevent this from happening.
* Option D is correct because including FOR UPDATE in the SOQL query locks the retrieved records for the duration of the transaction. This prevents other transactions from updating the record until the current transaction is complete, which is essential for avoiding race conditions where two users might overwrite each other's updates.
* Option A is incorrect because while adding a try/catch block around the update operation is good practice for handling exceptions, it does not prevent overwrites from concurrent updates.
* Option B is incorrect because using upsert instead of update does not address the problem of concurrent updates. The upsert operation is used to either insert a new record or update an existing one based on whether a record with a matching ID or external ID already exists.
* Option C is incorrect because FOR UPDATE should be used in the SOQL query to lock the records, not in the SELECT statement itself.
References:
Salesforce Developer Documentation on Locking Statements: Locking Statements Salesforce Developer Blog on Handling Concurrency in Apex: Handling Concurrency in Apex
NEW QUESTION # 78
A developer has a Visualforce page that automatically assigns ewnership of an Account to a queue upon save. The page appears to correctly assign ownership, but an assertion validating the correct ownership fails.
What can cause this problem?
Answer: D
Explanation:
The test class does not retrieve the updated value from the database, which can cause the assertion to fail. When a test class performs a DML operation on a record, such as updating the ownership of an Account, the record is not automatically refreshed in the test context. The test class needs to explicitly query the record from the database after the DML operation to get the updated value, and then use it for the assertion. For example, the test class can use the following code to query the updated Account and assert the correct ownership:
// Perform DML operation on the Account update account;
// Query the updated Account from the database Account updatedAccount = [SELECT OwnerId FROM Account WHERE Id = :account.Id];
// Assert the correct ownership System.assertEquals(queue.Id, updatedAccount.OwnerId); By using this code, the test class can avoid the assertion failure and verify the correct functionality of the Visualforce page. Reference: [Testing DML Operations], [Querying Test Data]
NEW QUESTION # 79
Consider the following code snippet:
A developer created the following test class to provide the proper code coverage for the snippet above:
However, when the test runs, no data is returned and the assertion fails.
However, when the test runs, no data is returned and the assertion fails.
Which edit should the developer make to ensure the test class runs successfully?
Answer: B
NEW QUESTION # 80
What is the transaction limit for SOQL queries?
Answer: A
NEW QUESTION # 81
A developer migrated functionality from JavaScript demoting to a Lightning web component and wants to use the existing getOpportunities() method to provide data.
Which modification to the method is necessary?
Answer: A
NEW QUESTION # 82
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