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Salesforce Plat-Dev-301 Exam Syllabus Topics:

Section	Weight	Objectives
Logic, Process Automation, and Integration	27%	- Asynchronous Apex: future, queueable, batch, scheduled - Complex business logic and automation design - Advanced Apex programming and transaction management - REST/SOAP API, Platform Events, and external integrations
Testing, Debugging, and Deployment	20%	- Debugging and error handling across layers - Advanced testing strategies and test frameworks - Deployment strategies, CI/CD, and change management
Performance and Data Management	18%	- Data modeling and complex data operations - Optimize queries and handle large data volumes - Governor limits optimization and best practices
User Interface Development	20%	- Implement advanced Visualforce functionality - Optimize UI performance and usability - Build complex Lightning Web Components and Aura Components
Advanced Developer Fundamentals	15%	- Design and maintain scalable, reusable code - Work with localization, multi-currency, and global features - Apply security best practices in development

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q153-Q158):

NEW QUESTION # 153
A developer is writing a Visualforce page that queries accounts in the system and presents a data table with the results. The users want to be able to filter the results based on up to five fields. However, the users want to pick the five fields to use as filter fields when they run the page.
Which Apex code feature is required to facilitate this solution?

A. Metadata APT
B. Streaming API
C. variable binding
D. dynamic SOQL

Answer: D

Explanation:
The requirement described in the question calls for a flexible way to query records based on user-selected fields. Dynamic SOQL is the perfect tool for this job as it allows the construction of a SOQL string at runtime, which can include any number of fields and filter conditions that are determined at the time the user interacts with the page. This enables the creation of a highly customizable query interface. A, B, and C are not suitable for this requirement as they serve different purposes: A (Streaming API) is for receiving real-time streams of data changes, B (Metadata API) is for managing the metadata of your Salesforce org, and C (variable binding) is used in Visualforce to bind data between the page and the controller but does not provide dynamic query capabilities.
Reference
Dynamic SOQL: Dynamic SOQL in Apex Developer Guide

NEW QUESTION # 154
A Salesforce developer is hired by a multi-national company to build a custom Lightning application that shows employees their employment benefits and earned commissions over time. The application must acknowledge and respect the user's locale context for dates, times, numbers, currency, and currency symbols.
When using Aura components, which approach should the developer implement to ensure the Lightning application complies with the user's locale?

A. Use the $Lacale value provider to retrieve the user preferences.
B. Use the $Label global value provider.
C. Use the $User global variable to retrieve the user preferences.
D. Create a Hierarchical custom setting to store user preferences.

Answer: A

Explanation:
The $Locale value provider should be used to ensure the Lightning application respects the user's locale for dates, times, numbers, currency, and currency symbols. This global value provider gives components access to locale formats and labels, which are automatically rendered according to the user's locale settings.

NEW QUESTION # 155
A company uses Dpportunities to track sales to their customers and their org has millions of Opportunities. They want to begin to track revenue over time through a related Revenue object.
As part of their initial implementation, they want to perform a one-time seeding of their data by automatically creating and populating Revenue records for Opportunities, based on complex logic.
They estimate that roughly 100,000 Opportunities will have Revenue records created and populated.
What is the optimal way to automate this?

A. Use system, enqueuJob (| to invoke a gueusable class.
B. Use Database. executeBatch () to invoke a Queueable class.
C. Use Database. =executeBatch() to invoke a Database. Batchable class.
D. Use system, acheduladeb() to schedule a patakape.Scheduleable class.

Answer: C

Explanation:
For a one-time bulk operation on a large data set, using a Database.Batchable class is the best approach. This allows complex logic to be processed in manageable chunks and efficiently manages system resources.

NEW QUESTION # 156
A developer has a test class that creates test data before making a mock callout but now receives a 'You have uncommitted work pending. Please commit or rollback before calling out' error.
Which step should be taken to resolve the error?

A. Ensure both the insertion and mock callout occur after the Test.startTest().
B. Ensure the records are inserted before the Test.startTess() statement and the mock callout occurs after the Test. Startest().
C. Ensure the records are Inserted before the Tezt.startTest() statement and the mock callout occurs within a method annotated with @testSetup.
D. Ensure both the Insertion and mock callout occur after the I==L. stoptest_().

Answer: B

Explanation:
When working with Apex tests that involve callouts, it's important to avoid the 'uncommitted work pending' error. This error typically occurs because DML operations (like inserts) are pending when a callout is attempted. Salesforce requires that all callouts are made before any DML operations in a transaction. To avoid this, the pattern is to insert the records before calling Test.startTest(), and then make the callout after this call. Test.startTest() marks the point where your actual test begins, and it resets the governor limits. By making the callout after this point, it ensures that the DML operations are committed and you are within a new execution context regarding governor limits.
Testing HTTP Callouts by Implementing the HttpCalloutMock Interface
Understanding Execution Contexts

NEW QUESTION # 157
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?

A. Use a chained batch Apex to split the data into smaller batches.
B. Increase the timeout limit in the callout options,
C. Implement an asynchronous callout using the Continuation class,
D. Use the @future annotation to make the callout asynchronous.

Answer: C

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 # 158
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