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| Section | Weight | Objectives |
|---|---|---|
| Data Modeling | 12% | - Advanced object relationships and data modeling - Large data volumes considerations - External objects and data sources |
| Logic and Process Automation | 22% | - Dynamic Apex and SOQL/SOSL - Invocable Actions and Platform Events - Advanced Apex programming - Asynchronous Apex (Batch, Queueable, Future, Scheduled) |
| Integration | 15% | - Platform Events and Change Data Capture - Named Credentials and authentication - REST and SOAP web services (Apex callouts) - External Services and Connect REST API |
| User Interface | 18% | - Visualforce advanced controllers - Lightning Data Service - Aura Components - Lightning Web Components (LWC) advanced features |
| Testing, Debugging, and Deployment | 15% | - Test data strategies and mocking - Debugging and performance profiling - Apex unit testing best practices - Deployment tools (SFDX, Metadata API) |
| Architecture | 18% | - Namespace and package management - Apex Enterprise Patterns - Design patterns and Apex trigger frameworks - Governor limits and bulkification |
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NEW QUESTION # 71
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? A)
B)
C)
D)
Answer: D
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.
Salesforce Developer Documentation on Locking Statements: Locking Statements Salesforce Developer Blog on Handling Concurrency in Apex: Handling Concurrency in Apex
NEW QUESTION # 72
Exhibit.
Given the code above, which two changes need to be made in the Apex Controller for the code to work? Choose 2 answers
Answer: B,C
Explanation:
Based on the code provided, here are the necessary changes:
Change B is required because the argument in the Apex controller's serverEcho method must match the data type expected by the JavaScript calling the method. The Apex method expects an Object named firstName, which is then cast to a String inside the method. The JavaScript is passing an object with a property firstName, so no change is needed in the JavaScript.
Change D is correct because line 06 is redundant and unnecessary. We can directly use firstName in the return statement as it is already a String type. The get() method is typically used when you have a Map and you need to retrieve a value by its key. Since firstName is already being passed as a String, there's no need to cast it or retrieve it using get().
Apex Developer Guide
NEW QUESTION # 73
Universal Containers develops a Salesforce application that requires frequent interaction with an external REST API.
To avoid duplicating code and improve maintainability, how should they implement the APL integration for code reuse?
Answer: B
Explanation:
Creating a reusable Apex class for API integration allows for code encapsulation and maintainability. This class can then be invoked from any other Apex class that requires interaction with the API, preventing code duplication.
NEW QUESTION # 74
Which three Visualforce components can be used to initiate Ajax behavior to perform partial page updates?
Choose 3 answers
Answer: B,C,E
Explanation:
<apex:commandLink> and <apex:commandButton> components can cause the form data to be sent to the server and can be configured to refresh specific parts of the page.
<apex:actionSupport> adds AJAX support to other components and can trigger partial page updates based on events such as onclick, onchange, etc.
Visualforce Guide
NEW QUESTION # 75
A company has code to update a Request and Request Lines and make a callout to their external ERP system's REST endpoint with the updated records.
The callousUtil.makeRestCallout fails with a "You have uncommitted work pending. Please commit or rollback before calling cut' error. What should be done to address the problem?
Answer: A
Explanation:
The error occurs because DML operations were performed before a callout. To fix this, the callout should be made from an asynchronous method such as one annotated with @future(callout=true), which allows DML operations to be committed separately from the callout.
nces: Apex Developer Guide - Making Asynchronous Callouts
NEW QUESTION # 76
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