[2025年05月]更新のSalesforce DEX-450テストエンジンとPDFで完全版無料問題集を無料提供
最新版を今すぐ試そうDEX-450認定有効な試験問題集
質問 # 66
A developer in a Salesforce org with 100 Accounts executes the following code using the Developer console: Account myAccount = new Account(Name = 'MyAccount');Insert myAccount;For (Integer x = 0; x < 250; x++)
{Account newAccount = new Account (Name='MyAccount' + x);try {Insert newAccount;}catch (Exception ex) {System.debug (ex) ;}}insert new Account (Name='myAccount'); How many accounts are in the org after this code is run?
- A. 0
- B. 1
- C. 2
- D. 3
正解：D
質問 # 67
Since Aura application events follow the traditional publish- subscribe model, which method is used to fire an event?
- A. registerEvent
- B. emit{)
- C. fireEvent ()
- D. fire()
正解：D
解説：
In Aura Components, application events are fired by invoking the fire() method on the event instance.
Option D: fire()
Correct.
To fire an application event, you first get the event instance using cmp.getEvent("eventName") and then call fire() on it.
Example:
var appEvent = $A.get("e.namespace:eventName");
appEvent.setParams({ "param1" : value1 });
appEvent.fire();
registerEvent is used in the component markup to declare that the component can fire or handle an event.
It is not a method used to fire an event.
There is no fireEvent() method in the Aura framework.
The correct method to fire an event is fire().
Option C: emit()
Incorrect.
emit() is not a method used in Aura components.
This method is commonly used in other frameworks but not in Aura.
Conclusion:
The method used to fire an Aura application event is fire(), which is option D.
Reference:
Firing Application Events
Incorrect Options:
Option A: registerEvent
Incorrect.
Registering Events
Option B: fireEvent()
Incorrect.
質問 # 68
A developer created a trigger on the Account object. While testing the trigger, the developer sees the error message 'Maximum trigger depth exceeded'.
What could be the possible causes?
- A. The trigger is too long and should be refactored into a helper class.
- B. The trigger is getting executed multiple times.
- C. The trigger does not have sufficient code coverage.
- D. The developer does not have the correct user permission.
正解：B
質問 # 69
Which three statements are accurate about debug logs? Choose 3 answers
- A. Amount of information logged in the debug log can be controlled by the log levels.
- B. Amount of information logged in the debug log can be controlled programmatically.
- C. Debug Log levels are cumulative, where FINE lop level includes all events logged at the DEBUG, INFO, WARN, and ERROR levels.
- D. To View Debug Logs, "Manager Users" or "View All Data" permission is needed.
- E. To View Debug Logs, "Manager Users" or "Modify All Data" permission is needed.
正解：A、B
質問 # 70
A developer has the following class and trigger code public class insurancerates{ public static final decimal smokercharge = 0.01; } trigger contacttrigger on contact (before insert){ insurancerates rates = new insurancerates(); decimal basecost=xxx; } Which code segment should a developer insert at the xxx to set the basecost variable to the value of the class variable smokercharge?
- A. Insurancerates.smokercharge
- B. Contacttrigger.insurancerates.smokercharge
- C. Rates.getsmokercharge()
- D. Rates.smokercharge
正解：A
質問 # 71
A developer needs to have records with specific field values in order to test a new Apex class.
What should the developer do to ensure the data is available to the test?
- A. Use SOQL to query the org for the required data.
- B. Use Anonymous Apex to create the required data.
- C. Use Test.loadData() and reference a CSV file in a static resource.
- D. Use test.loadData() and reference a JSON file in Documents.
正解：C
解説：
To ensure that specific data is available in test methods, the developer should create test data within the test context.
Option B: Use Test.loadData() and reference a CSV file in a static resource.
Correct Approach.
Test.loadData() is a method that allows test methods to load test data from a CSV file stored as a static resource.
This method creates the records in the test context, ensuring that the data is available during the test execution.
Using a CSV file makes it easy to define multiple records with specific field values.
Usage Example:
@isTest
private class MyTestClass {
@isTest
static void testMethod() {
List<MyObject__c> testRecords = (List<MyObject__c>) Test.loadData(MyObject__c.sObjectType, 'MyTestData');
// Proceed with testing using testRecords
}
}
Where 'MyTestData' is the name of the static resource containing the CSV file.
Test.loadData() does not support loading data from JSON files or from the Documents object.
It uses CSV files stored as static resources.
Option C: Use Anonymous Apex to create the required data.
Not Effective for Testing.
Data created via Anonymous Apex is not available in test methods due to data isolation.
Test methods operate in their own context and cannot access data created outside the test unless SeeAllData=true is used, which is discouraged.
Option D: Use SOQL to query the org for the required data.
Not Recommended.
Test methods should not rely on existing org data.
Tests should create their own data to ensure consistency and avoid dependencies.
Using SeeAllData=true is discouraged.
Conclusion:
To ensure that records with specific field values are available in the test, the developer should use Test.loadData() with a CSV file stored in a static resource.
Therefore, Option B is the correct answer.
Reference:
Test.loadData() Method
Static Resources
Options Not Suitable:
Option A: Use test.loadData() and reference a JSON file in Documents.
Incorrect.
質問 # 72
A developer completed modifications feature that is comprised of two elements:
* Apex trigger
* Trigger handler Apex class
What are two factors that the developer must take into account to properly deploy them to the production environment?
Choose 2 answers
- A. Test methods must be declared with the testMethod keyword.
- B. Apex classes must have at least 75% code coverage org-wide.
- C. At least one line of code must be executed for the Apex trigger.
- D. All methods in the test classes must use @istest.
正解：B、D
質問 # 73
A developer needs to avoid potential system problems that can arise in a multi-tenant architecture. Which requirement helps prevent poorty written applications from being deployed to a production environment?
- A. All Apex code must be annotated with the with sharing keyword.
- B. SOQL queries must reference sObActs with their appropriate namespace.
- C. All validation rules must be active before they can be deployed.
- D. Unit tests must cover at least 75% of the application's Apex code
正解：D
質問 # 74
team of developers is working on a source-driven project that allows them to work independently, with many different org configurations.
Which type of Salesforce orgs should they use for their development?
- A. Developer sandboxes
- B. Full Copy sandboxes
- C. Developer orgs
- D. Scratch orgs
正解：D
解説：
Scratch Orgs are disposable Salesforce orgs that can be created quickly and configured with different features and settings. They are ideal for source-driven development and allow developers to work independently.
Option D: Scratch orgs
Correct Answer.
Scratch orgs support source-driven development and can be fully configured through scripts and the Salesforce CLI.
Developers can create and destroy scratch orgs as needed, ensuring they have isolated environments.
Reference:
Options Not Applicable:
Option A: Full Copy sandboxes
Better suited for staging and performance testing, not for individual developer environments.
Option B and C: Developer orgs and Developer sandboxes
Less flexible for source-driven development.
Developer sandboxes are not as easily reconfigurable as scratch orgs.
Conclusion:
For source-driven development with independent configurations, the team should use Scratch orgs, which is Option D.
質問 # 75
Which two number expression evaluate correctly? Choose 2 answers
- A. Long I = 3.14159;
- B. Integer I = 3.14159;
- C. Double D =3.14159;
- D. Decimal D = 3.14159;
正解：C、D
質問 # 76
A developer must create a Lightning component that allows users to input Contact record information to create a Contact record, including a Salary__c custom field.
What should the developer use, along with a lightning-record-edit-form, so that salarv < field functions as a currency Input and is only viewable and editable by users that have the correct field level permissions on salary _c?
- A.
- B.
- C.
- D.
正解：B
質問 # 77
A Salesforce Administrator used Flow Builder to create a flow named ''accountOnboarding''. The flow must be used inside an Aura component.
Which tag should a developer use to display the flow in the component?
- A. Aura:flow
- B. Aura:flow
- C. Lightning-flow
- D. Lightning:flow
正解：D
質問 # 78
Which two are phases in the Salesforce Application Event propagation framework? Choose
2 answers
- A. Bubble
- B. Default
- C. Capture
正解：B、C
質問 # 79
Universal Containers decided to transition from Classic to Lightning Experience. They asked a developer to replace a JavaScript button that was being used to create records with prepopulated values.
What can the developer use to accomplish this?
- A. Validation rules
- B. Apex triggers
- C. Record triggered flows
- D. Quick Actions
正解：D
解説：
To replace a JavaScript button from Salesforce Classic that creates records with prepopulated values in Lightning Experience, the developer can use:
Option A: Quick Actions
Quick Actions (Specifically, Object-Specific Actions):
Quick Actions allow users to perform actions, such as creating or updating records, from a record page or global context.
Prepopulating Fields:
You can predefine field values in Quick Actions using predefined values or by utilizing Lightning Component actions.
Reference:
"You can set predefined values for fields on the action layout, which lets you specify default values for the new record."
- Salesforce Help: Predefined Field Values for Quick Actions
Why Other Options Are Less Suitable:
Option B: Validation Rules
Validation rules enforce data integrity but do not create records or prepopulate values.
Option C: Record-Triggered Flows
Flows can automate processes but are not a direct replacement for buttons that create records with prepopulated values from the UI.
Option D: Apex Triggers
Triggers execute logic in response to DML events but are not used to create UI components or replace buttons.
Conclusion:
Quick Actions are the recommended way to replicate the functionality of JavaScript buttons in Lightning Experience.
質問 # 80
What is a benefit of using an after insert trigger over using a before insert trigger?
- A. An after insert trigger allows a developer to make a callout to an external service.
- B. An after insert trigger allows a developer to modify fields in the new record without a query.
- C. An after insert trigger allows a developer to bypass validation rules when updating fields on the new record.
- D. An after insert trigger allows a developer to insert other objects that reference the new record.
正解：D
質問 # 81
What are two uses for External IDs? (Choose two.)
- A. To identify the sObject type in Salesforce
- B. To create relationships between records imported from an external system.
- C. To create a record in a development environment with the same Salesforce ID as in another environment
- D. To prevent an import from creating duplicate records using Upsert
正解：B、D
質問 # 82
Which annotation exposes an Apex class as a RESTful web service?
- A. @HttpInvocable
- B. @RemoteAction
- C. @AuraEnabled(cacheable=true)
- D. @RestResource (urlMapping="'/mySexrvice/*')
正解：D
解説：
To expose an Apex class as a RESTful web service, you use the @RestResource annotation.
Option C: @RestResource(urlMapping='/myService/*')
@RestResource Annotation:
The @RestResource annotation is used to define an Apex class as a RESTful web service, specifying the URL mapping.
Methods within the class are annotated with @HttpGet, @HttpPost, @HttpPut, etc., to handle HTTP requests.
Example:
apex
Copy code
@RestResource(urlMapping='/myService/*')
global with sharing class MyRestService {
@HttpGet
global static String doGet() {
// Implementation
}
}
Reference:
"Use @RestResource to expose an Apex class as a RESTful web service."
- Apex Developer Guide: Exposing Apex Classes as REST Web Services
Why Other Options Are Incorrect:
Option A: @HttpInvocable
There is no @HttpInvocable annotation in Apex.
Option B: @RemoteAction
Used to expose methods to JavaScript in Visualforce pages, not for REST services.
"@RemoteAction methods enable you to call methods in Apex controllers from JavaScript code in a Visualforce page."
- Apex Developer Guide: Remote Action Methods
Option D: @AuraEnabled(cacheable=true)
Used to expose Apex methods to Lightning components, not for REST services.
Conclusion:
Using @RestResource with a URL mapping is the correct way to expose an Apex class as a RESTful web service.
質問 # 83
Which annotation should a developer use on an Apex method to make it available to be wired to a property in a Lightning web component?
- A. @AureEnabled
- B. @RemoteAction(|cacheable=true)
- C. @RemoteAction
- D. @AureEnabled (cacheable=true)
正解：D
質問 # 84
An org has an existing flow that edits an Opportunity with an Update Records element. A developer must update the flow to also create a Contact and store the created Contact's ID on the Opportunity.
Which update must the developer make in the flow?
- A. Add a new Get Records element.
- B. Add a new Create Records element.
- C. Add a new Roll Back Records element.
- D. Add a new Update Records element.
正解：B
解説：
To update the flow to create a Contact and store the Contact's ID on the Opportunity:
Option D: Add a new Create Records element.
Steps:
Add Create Records Element: Configure it to create a Contact and store the newly created Contact's ID in a variable.
Update Opportunity: Use the existing Update Records element or add a new one to update the Opportunity with the Contact's ID.
Reference:
"Use the Create Records element to create records in your flow."
- Salesforce Help: Create Records Element
Why Other Options Are Incorrect:
Option A: An Update Records element cannot create a new Contact.
Option B: A Get Records element retrieves existing records but does not create new ones.
Option C: Roll Back Records is used to undo record changes in the flow transaction.
質問 # 85
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Salesforce DEX-450認定試験は、稲妻の経験におけるApexとVisualforceを使用して、プログラム開発の知識とスキルを実証することに関心のある個人向けに設計されています。この認定は、ApexとVisualforceを使用してSalesforceプラットフォームでカスタムアプリケーションを設計および開発する機能を紹介したい開発者に最適です。
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