CRT-450資格トレーリング & CRT-450専門試験

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Salesforce CRT-450 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Salesforce Fundamentals	7%	- Platform features and capabilities - Multi-tenant architecture - Development models and tools
Topic 2: Logic and Process Automation	40%	- Apex programming: classes, triggers, and methods - Formulas, roll-up summaries, and validation rules - SOQL, SOSL, and DML operations - Governor limits and exception handling - Order of execution - Process Builder, Flow, and Workflow
Topic 3: Testing, Debugging, and Deployment	17%	- Deployment tools and processes - Change management and best practices - Debugging tools and techniques - Code coverage requirements - Test methods and test data creation
Topic 4: User Interface	23%	- UI security and accessibility - Lightning Web Components - Lightning App Builder and components - Visualforce pages and controllers
Topic 5: Data Modeling and Management	13%	- Data import/export and management - Data security and sharing - Custom objects and fields - Relationships and lookup filters

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CRT-450専門試験、CRT-450参考書

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Salesforce Certified Platform Developer I 認定 CRT-450 試験問題 (Q193-Q198):

質問 # 193
A developer must perform a complex SOQL query that joins two objects in a Lightning component. How can the Lightning component execute the query?

A. Write the query in a custom Lightning web component wrapper ana invoke from the Lightning component,
B. Use the Salesforce Streaming API to perform the SOQL query.
C. Invoke an Apex class with the method annotated as &AuraEnabled to perform the query.
D. Create a flow to execjte the query and invoke from the Lightning component

正解：C

解説：
A Lightning component can execute a complex SOQL query that joins two objects by invoking an Apex class with the method annotated as @AuraEnabled. This annotation enables the Apex method to be called from the Lightning component's JavaScript controller or helper. The Apex method can then perform the SOQL query and return the results to the Lightning component. This approach allows the Lightning component to leverage the programmatic capabilities of Apex and SOQL to perform complex queries that are not possible with declarative tools such as flows or standard components. References:
* Certification - Platform Developer I - Trailhead, Section 5. Exam Outline, Topic: Logic and Process Automation, Weight: 46%, Objective: Describe how to use declarative and programmatic methods to create custom user interfaces on the Lightning Platform.
* [Call Apex Methods from Lightning Web Components], Trailhead Module, Unit: Call Apex Methods Imperatively
* [SOQL and SOSL Queries], Salesforce Developer Guide, Chapter: SOQL and SOSL Reference

質問 # 194
When a user edits the Postal Code on an Account, a custom Account text field named
''Timezone'' must be updated based on the values another custom object object called.
What is the optimal way to Implement this feature?

A. Build a flow with flow Builder.
B. Create a formula field.
C. Create an account approval process.
D. Build an account assignment rule.

正解：A

質問 # 195
Universal Containers wants Opportunities to no longer be editable when it reaches the Closed/Won stage.
Which two strategies can a developer use to accomplish this?
Choose 2 answers

A. Use a trigger.
B. Use the Process Automation settings.
C. Use a validation rule.
D. Use an after-save flow.

正解：A、C

質問 # 196
Which two are phases in the Aura application event propagation framework?
Choose 2 answers

A. Emit
B. Buddle
C. Control
D. default

正解：B、D

解説：
Event Propagation Phases in Aura Framework:
Default Phase: The framework executes handlers withevent.setDefault().
Bubble Phase: The event propagates upward from the target component to the root component.
Why Not Other Options?
A: Control: Not a valid Aura event propagation phase.
D: Emit: This is part of event creation, not propagation.
References:Aura Event Propagation:https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning
/events_application.htm

質問 # 197
A business implemented a magnification plan to encourage its customers to watch some educational videos.
Customers can watch videos over several days, and their progress is recorded. Award points are granted to customers for all completed videos. When the video is marked as completed in Salesforce, an external web service must be called so that points can be awarded to the user.
A developer implemented these requirements in the after update trigger by making a calf to an external web service. However, a System.CalloutException is occurring.
What should the developer do to fix this error?

A. Move the callout to an asynchronous method with structure (callout=true) annotation.
B. Write a REST service to integrate with the external web service.
C. Replace the after update trigger with a before insert trigger.
D. Surround the external call with a try-catch block to handle the exception.

正解：A

質問 # 198
......

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