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Salesforce Plat-Dev-301 Exam Syllabus Topics:

Section	Objectives
Testing and Deployment	- Testing strategies 1. Test data creation and mocking 2. Code coverage and quality practices - Deployment lifecycle 1. Version control and CI/CD concepts 2. Change sets and deployment tools
Integration and APIs	- External system integration 1. Callouts from Apex 2. REST and SOAP API usage - Platform events and messaging 1. Event-driven architecture 2. Change Data Capture concepts
Application Development	- Advanced Apex programming 1. Exception handling and debugging strategies 2. Apex design patterns and best practices 3. Dynamic Apex and metadata-driven development - Asynchronous processing 1. Batch Apex and Queueable Apex 2. Scheduled Apex 3. Future methods and limits considerations
Data Modeling and Management	- Advanced data modeling 1. Complex relationships and schema design 2. Large data volume considerations - Data access and security 1. Security enforcement in Apex 2. Sharing rules and Apex-managed sharing

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q139-Q144):

NEW QUESTION # 139
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?

A. Change the CallousUtill .makeRestCallout to an @future method.
B. Change the callousUtil makeRestCallout to an @InvocsblsMethod method.
C. Remove the Database. setSavepoint and Database. rollback.

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 # 140
What should a developer use to query all Account fields for the Acme account in their sandbox?

A. SELECT FIELDS (ALL) FROM Account WHERE Name = 'Acme' LIMIT 1
B. SELECT * FROM Recount WHERE Names = 'Aeme' LIMIT 1
C. SELECT ALL FROM Account WHERE Name = "Acme' LIMIT 1
D. SELECT FIELDS FAOM Account WHERE Name = 'Acme' LIMIT 1

Answer: A

Explanation:
The correct SOQL query to retrieve all fields for a specific Account is to use the FIELDS(ALL) function within the SELECT clause of the SOQL query. This will return all fields for the Account named 'Acme'.

NEW QUESTION # 141
Which three approaches should a developer implement to obtain the best performance for data retrieval when building a Lightning web component? Choose 3 answers

A. Use lazy load for occasionally accessed data.
B. Use the Lightning Data Service.
C. Use layoutTypes: 9'Full') to display a set of fields.
D. Use {Cacheable=true} whenever possible
E. Use getRecordUi to obtain metadata.

Answer: A,B,D

Explanation:
Lazy loading improves performance by loading data only when needed.
Lightning Data Service (LDS) handles data operations and caching efficiently.
Using {Cacheable=true} on Apex methods enables the Lightning Component framework to cache the method's return value, reducing server round-trips for the same data.
Lightning Web Components Developer Guide

NEW QUESTION # 142
An Aura component has a section that displays some information about an Account and it works well on the desktop, but users have to scroll horizontally to see the description field output on their mobile devices and tablets.

How should a developer change the component to be responsive for mobile and tablet devices? A)

B)

C)

D)

A. Option A
B. Option C
C. Option B
D. Option D

Answer: A

Explanation:
To make the Aura component responsive, the developer should set multipleRows="true" to allow the layout items to wrap onto multiple rows on smaller devices. Additionally, setting the size attribute for different device sizes ensures that the layout adapts to the screen width.

NEW QUESTION # 143
After a platform event is defined in a Salesforce org,events can be published via which mechanism?

A. External Apps require the standard Streaming API.
B. Internal Apps can use entitlement processes.
C. External Apps use an API Co publish event messages.
D. Internal Apps can use outbound messages.

Answer: C

Explanation:
Platform events in Salesforce can be published using a variety of mechanisms, including from external applications through the Salesforce APIs.
Option A is correct because external applications can use Salesforce APIs such as the REST API or the SOAP API to publish events to a platform event in Salesforce.
Options B, C, and D describe mechanisms that are not used for publishing platform events. Entitlement processes are for setting up and tracking service contracts, the standard Streaming API is for subscribing to events not publishing them, and outbound messages are a workflow action used to send information to external services, not for publishing platform events.
Salesforce Developer Documentation - Platform Events

NEW QUESTION # 144
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