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DEX-450テストエンジンお試しセット、DEX-450問題集PDF
Salesforce DEX-450は、稲妻の経験でApexとVisualforceを使用してプログラム開発のスキルと知識を持っている個人向けに設計された認定試験です。この認定試験は、Salesforceプラットフォームでカスタムアプリケーションを開発した経験がある個人を対象としています。この試験に合格することは、プログラム開発の専門知識を実証し、クライアント向けのカスタマイズされたソリューションを開発する能力を紹介する素晴らしい方法です。
質問 # 35
Where are two locations a developer can look to find information about the status of batch or future methods?
Choose 2 answers
- A. Apex Jobs
- B. Developer Console
- C. Apex Flex Queue
- D. Paused Flow Interviews component
正解：A、C
解説：
Option B: Apex Flex Queue.
Monitors batch jobs waiting for execution.
Option C: Apex Jobs.
Shows all asynchronous Apex jobs, including batch and future methods.
Why Not Other Options:
Option A: Developer Console doesn't provide job status.
Option D: Paused Flow Interviews are unrelated to Apex jobs.
Reference:
Apex Jobs Monitoring:
"The Apex Jobs page displays information about all Apex jobs-batch jobs, future methods, scheduled Apex, and Apex test jobs."
- Salesforce Help: Monitor Your Scheduled Jobs
質問 # 36
A developer created a Lightning web component called statusComponent to be inserted into the Account record page.
Which two things should the developer do to make the component available?
- A. Add < masterLabel>Account</master Label> to the statusComponent.js-meta ml file.
- B. Add<target> Lightning_RecordPage </target> to the statusComponent.js file.
- C. Add <target> lighting _RecordPage </target> to the statusComponent.js-meta ml file.
- D. Add <isExposed> true</isExposed> to the statusComponent.js-meta ml file.
正解：C、D
質問 # 37
developer created this Apex trigger that calls MyClass .myStaticMethod: trigger myTrigger on Contact(before insert) ( MyClass.myStaticMethod(trigger.new, trigger.oldMap); } The developer creates a test class with a test method that calls MyClass.mystaticMethod, resulting in 81% overall code coverage. What happens when the developer tries to deploy the trigger and two classes to production, assuming no other code exist?
- A. The deployment fails because no assertions were made in the test method.
- B. The deployment passes because both classes and the trigger were included in the deployment.
- C. The deployment passes because the Apex code has required (>75%) code coverage.
- D. The deployment fails because the Apex trigger has no code coverage.
正解：D
質問 # 38
A company wants to implement a new call center process for handling customer service calls. It requires service reps to ask for the caller's account number before proceeding with the rest of their call script.
Following best practices, what is the optimal approach to satisfy this requirmrnt?
- A. Approvals
- B. Einstein Next Best Action
- C. Apex trigger
- D. Flow Builder
正解：D
質問 # 39
Which two statements are true about using the @testSetup annotation in an Apex test class?
Choose 2 answers
- A. Records created in the test setup method cannot be updated in individualtest methods.
- B. In a test setup method, test data is inserted once and made available for all test methods in the test class.
- C. a method defined with the @tetestSetup annotation executes once for each test method in the test class and counts towards system limits.
- D. The ©testSetup annotation is not supported when the cg5lsTest(SeeAIIData=True) annotation is used.
正解：B、D
解説：
Option C: In a test setup method, test data is inserted once and made available for all test methods in the test class.
True.
The @testSetup method runs once before any test methods in the class.
Test data created in this method is available to all test methods, promoting code reuse and efficiency.
Reference:
Option D: The @testSetup annotation is not supported when the @isTest(SeeAllData=True) annotation is used.
True.
The @testSetup method is not supported in test classes annotated with @isTest(SeeAllData=true).
Using SeeAllData=true accesses existing organization data, conflicting with the isolation provided by @testSetup.
Option A: A method defined with the @testSetup annotation executes once for each test method in the test class and counts towards system limits.
False.
The @testSetup method executes only once per test class, not once per test method.
It does count towards the per-test-class limits but improves overall test performance.
Option B: Records created in the test setup method cannot be updated in individual test methods.
False.
Records created in a @testSetup method can be queried and modified within individual test methods.
This allows tests to manipulate shared test data as needed.
Conclusion:
The correct statements are C and D, as they accurately describe the behavior and restrictions of the @testSetup annotation.
質問 # 40
A developer working on a time management application wants to make total hours for each timecard available to applications users. A timecard entry has a Master-Detail relationship to a timecard. Which approach should the developer use to accomplish this declaratively?
- A. A visualforce page that calculates the total number of hours for a timecard and displays it on the page.
- B. A Process Builder process that updates a field on the timecard entry is created.
- C. A Roll-up Summary field on the Timecard Object that calculates the total hours from timecard entries for that timecard.
- D. An Apex trigger that uses an Aggregate Query to calculate the hours for a given timecard and stores it in a custom field.
正解：C
質問 # 41
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 < 150; 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：B
質問 # 42
A credit card company needs to Implement the functionality for a service agent to process damaged credit cards. When the customers call In, the service agent must gather many pieces of information Is tasked to Implement this functionality.
What should the developer use to satisfy this requirement In the most efficient manner?
- A. Flow Builder
- B. Apex Trigger
- C. Approval Process
- D. Lightning Component
正解：B
質問 # 43
Which exception type cannot be caught?
- A.
- B.
- C.
- D.
正解：D
質問 # 44
In the following example, which starting context will mymethod execute it is invoked?
- A. Sharig rules will be enforced by the instartiating class.
- B. Sharig rules will be enforced for the running user.
- C. Sharig rules will not be enforced for the running user.
- D. Sharig rules will be inherited from the calling context.
正解：D
質問 # 45
The Job _Application__c custom object has a field that is a master-detail relationship to the Contact object, where the Contact object is the master.
As part of a feature implementation, a developer needs to retrieve a list containing all Contact records where the related Account Industry is
'Technology', while also retrieving the Contact's Job_Application__c records.
Based on the object's relationships, what is the most efficient statement to retrieve the list of Contacts?
- A.
- B.
- C.
- D.
正解：D
質問 # 46
In the following example, which sharing context will myMethod execute when it is invoked?
- A. Sharing rules will be enforced for the running user.
- B. Sharing rules will be Inherited from the calling context.
- C. Sharing rules will not be enforced for the running user.
- D. Sharing rules will be enforced by the instantiating class.
正解：B
質問 # 47
Which three declarative fields are correctly mapped to variable types in Apex? (Choose three.)
- A. Date/Time maps to Dateline.
- B. Number maps to Decimal.
- C. TextArea maps to List of type String.
- D. Checkbox maps to Boolean.
- E. Number maps to Integer.
正解：A、B、D
質問 # 48
A Next Best Action strategy uses an Enhance element that invokes an Apex method to determine a discount level for a Contact, based on a number of factors.
What is the correct definition of the Apex method?
- A.
- B.
- C.
- D.
正解：D
質問 # 49
A developer needs to make a custom Lightning Web Component available in the Salesforce Classic user interface. Which approach can be used to accomplish this?
- A. Use the Lightning Out JavaScript library to embed the Lightning Web Component in a Visualforce page and add to the page layout.
- B. Embed the Lightning Web Component is a Visualforce Component and add directly to the page layout.
- C. Wrap the Lightning Web Component in an Aura Component and surface the Aura Component as a Visualforce tab.
- D. Use a Visualforce page with a custom controller to invoke the Lightning Web Component using a call to an Apex method.
正解：A
解説：
To make a Lightning Web Component (LWC) available in Salesforce Classic, you can embed it in a Visualforce page using Lightning Out.
Option D: Use the Lightning Out JavaScript library to embed the Lightning Web Component in a Visualforce page and add to the page layout.
Lightning Out allows LWCs to be embedded in Visualforce pages.
The Visualforce page can then be included in Salesforce Classic interfaces.
Why Not Other Options:
Option A: Visualforce components cannot directly contain LWCs.
Option B: Wrapping an LWC in an Aura component and surfacing it as a Visualforce tab doesn't make it available on page layouts.
Option C: You cannot invoke an LWC from a Visualforce page using an Apex method call.
Reference:
Lightning Out for Visualforce:
"Lightning Out is a feature that extends Lightning components to any web page. Use it to embed Lightning web components in a Visualforce page."
- Lightning Web Components Dev Guide: Use Lightning Web Components in Visualforce Pages
質問 # 50
Where are two locations a developer can look to find information about the status of asynchronous or future cals? Choose 2 answers
- A. Time-Based Workflow Monitor
- B. Apex Flex Queue (Missed)
- C. Apex Jobs (Missed)
- D. Paused Flow Interviews component
正解：B、C
質問 # 51
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