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Salesforce Plat-Dev-301 Exam Syllabus Topics:

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

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Exam Plat-Dev-301 Preparation - First-grade Plat-Dev-301: Online Salesforce Certified Platform Developer II - Multiple Choice Lab Simulation

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Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q54-Q59):

NEW QUESTION # 54
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. dynamic SOQL
D. variable binding

Answer: C

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 # 55
After a platform event is defined in a Salesforce org,events can be published via which mechanism?

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

Answer: D

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 # 56
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 # 57
Refer to the following code snippet:

A developer created a JavaScript function as part of a Lightning web component (LWC) that surfaces information about Leads by wire calling geyFetchLeadList whencertain criteria are met. Which three changes should the developer implement in the Apex class above to ensure the LWC can display data efficiently while preserving security? Choose 3 answers

A. Implement the with sharing keyword in the class declaration.
B. Use the WZ E D clause within the SOQL query.
C. Implement the with keyword in the class declaration.
D. Annotate the Apex method with @AuraEnabled(Cacheable=True).
E. Annotate the Apex method with @AuraEnabled.

Answer: A,D,E

Explanation:
The Apex class needs to have the method annotated with @AuraEnabled to expose it to the LWC. The 'with sharing' keyword ensures that the data access is enforced according to the user's permissions. @AuraEnabled(cacheable=true) allows client-side caching for improved performance.
@AuraEnabled Annotation: Apex Developer Guide
Enforcing Sharing Rules: Apex Developer Guide

NEW QUESTION # 58
A developer is building a Lightning web component that searches
for Contacts. The component must communicate the search
results to other unrelated Lightning web components, that are in
different DOM trees, when the search completes.
What should the developer do to implement the communication?

A. Fire an application event.
B. Publish a message on a message channel.
C. Fire a custom component event.
D. Publish an event on an event channel.

Answer: B

Explanation:
For communication between unrelated Lightning web components that are in different DOM trees, the most suitable approach is to use the Lightning Message Service (LMS). This service allows components to communicate with each other using a message channel, which is particularly useful when the components are not in the same containment hierarchy. By publishing and subscribing to messages on a message channel, components can exchange data and notifications, which is ideal for the scenario described.
Lightning Web Components Developer Guide - Communicate Across the DOM with Lightning Message Service

NEW QUESTION # 59
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