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Salesforce Plat-Dev-301 Exam Syllabus Topics:

Section	Weight	Objectives
Logic and Process Automation	22%	- Dynamic Apex and SOQL/SOSL - Advanced Apex programming - Invocable Actions and Platform Events - Asynchronous Apex (Batch, Queueable, Future, Scheduled)
User Interface	18%	- Lightning Web Components (LWC) advanced features - Visualforce advanced controllers - Aura Components - Lightning Data Service
Testing, Debugging, and Deployment	15%	- Test data strategies and mocking - Deployment tools (SFDX, Metadata API) - Debugging and performance profiling - Apex unit testing best practices
Integration	15%	- External Services and Connect REST API - Named Credentials and authentication - REST and SOAP web services (Apex callouts) - Platform Events and Change Data Capture
Data Modeling	12%	- Advanced object relationships and data modeling - Large data volumes considerations - External objects and data sources
Architecture	18%	- Apex Enterprise Patterns - Design patterns and Apex trigger frameworks - Governor limits and bulkification - Namespace and package management

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q147-Q152):

NEW QUESTION # 147
A developer is tasked with creating a Lightning web component that is responsive on various devices, Which two components should help accomplish this goal?
Choose 2 answers

A. Lightning-layout
B. Lightning-input-location
C. lightning-navigation
D. lightning-layout--item

Answer: A,D

Explanation:
Lightning-layout and lightning-layout-item are components used in Lightning Web Components to create responsive grid layouts that adapt to the screen size of various devices.
Lightning Layout: Component Reference
Lightning Layout Item: Component Reference

NEW QUESTION # 148
A developer created a Lightning web component that uses a lightning-record-edit-form to collect information about Leads. Users complain that they only see one error message at a time about their input when trying to save a Lead record.
What is the recommended approach to perform validations on more than one field, and display multiple error messages simultaneously with minimal JavaScript intervention?

A. Try/catch/finally block
B. Validation rules
C. Apex trigger
D. External JavaScript library

Answer: D

Explanation:
Salesforce validation rules are declarative and can be used to validate more than one field on an object and display multiple error messages. This approach requires minimal JavaScript code and uses Salesforce's built-in validation framework. Reference:
Validation Rules

NEW QUESTION # 149
A company has many different unit test methods that create Account records as part of their data setup. A new required field was added to the Account and now all of the unit tests fail.
What is the optimal way for a developer to fix the issue?

A. Create a TestDataFactory class that serves as the single place to create Accounts for unit tests and set the required field there.
B. Change the required field to be a validation rule that excludes the System Administrator profile.
C. Add a before insert trigger on Account to set the value of the required field,
D. Add the required field to the data setup for all of the unit tests.

Answer: A

Explanation:
The optimal way to fix the failing unit tests after adding a new required field to the Account object is to create a TestDataFactory class that serves as a centralized place to create Accounts for unit tests. This class would include the new required field, ensuring that all unit tests have the necessary data setup.

NEW QUESTION # 150
A developer created a Lightning web component that uses a Lightning_record_edit_fom to collect Information about Leads. Users complain that they only see one error message at a time about their input when trying to save a Lead record.
Which best practice should the developer use to perform the validations on more than one held, thus allowing more than one error message to be displayed simultaneously?

A. Apex REST
B. Next Best Action
C. Custom validation rules
D. Client_side validation

Answer: D

Explanation:
When users need to see multiple error messages at a time related to their input on a form, client-side validation is the preferred method. This allows immediate feedback on the input fields without the need to submit the form to the server.
Option B (Client-side validation) is correct because it enables validation of multiple fields before submitting the form, allowing users to see all error messages at once for the fields that fail validation.
Options A (Apex REST), C (Custom validation rules), and D (Next Best Action) are not directly related to the validation of form inputs in the context of a Lightning web component.
Lightning Web Components Developer Guide: Lightning Web Components and Salesforce Data

NEW QUESTION # 151
A developer is inserting, updating, and deleting multiple lists of records in a single transaction and wants to ensure that any error prevents all execution.
How should the developer implement error exception handling in their code to handle this?

A. Use a try-catch and use sObject.addError() on any failures.
B. Use a try-catch statement and handle DML cleanup in the catch statement,
C. Use Database methods to obtain lists of Database.SaveResults.
D. Use Database.setSavepoint {} and Database.rollBack with a try-catch statement.

Answer: D

Explanation:
Using Database.setSavepoint() and Database.rollback() within a try-catch statement is the recommended approach for handling transactions that involve multiple DML operations. This allows the developer to roll back all changes if an error occurs, ensuring that partial changes are not committed to the database.

NEW QUESTION # 152
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