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Salesforce Programmatic Development using Apex and Visualforce in Lightning Experienceは、IT業界で広く認知された公式認定資格のひとつです。ShikenPASSのDEX-450練習問題（202問）で、2026年の合格に向けた準備を着実に進めましょう。

Salesforce DEX-450 試験概要:

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Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience（DEX-450）受験者からのよくあるご質問

Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience 認定 DEX-450 試験問題：

問題 #1

A developer identifies the following triggers on the Expense _c object:

The triggers process before delete, before insert, and before update events respectively.
Which two techniques should the developer implement to ensure trigger best practices are followed?
Choose 2 answers

A. Unify the before insert and before update triggers and use Flow for the delete action.
B. Create helper classes to execute the appropriate logic when a record is saved.
C. Maintain all three triggers on the Expense __c object, but move the Apex logic out of the trigger definition.
D. Unity all three triggers In a single trigger on the Expense__c object that Includes all events.

問題 #2

What are two benefits of using declarative customizations over code?
Choose 2 answer

A. Declarative customizations generally require less maintenance
B. Declarative customizations automatically update with each Salesforce release.
C. Declarative customizations cannot generate run time errors
D. Declarative customizations automatically generate test classes.

問題 #3

Universal Containers is building a recruiting app with an Applicant object that stores information about an individual person and a Job object that represents a job. Each applicant may apply for more than one job.
What should a developer implement to represent that an applicant has applied for a job?

A. Master-detail field from Applicant to Job
B. Lookup field from Applicant to Job
C. Junction object between Applicant and Job
D. Formula field on Applicant that references Job

問題 #4

A developer needs to create a baseline set of data (Accounts, Contacts, Products, Assets) for an entire suite of Apex tests allowing them to test isolated requirements for various types of Salesforce cases.
Which approach can efficiently generate the required data for each unit test?

A. Add @IsTest (seeAllData=true) at the start of the unit test class.
B. Create a mock using the HttpcalloutMock interface.
C. Use @TestSetup with a void method.
D. Create test data before Test .startTest() in the unit test.

問題 #5

While working in a sandbox, an Apex test fails when run in the Test Runner. However, executing the Apex logic in the Execute Anonymous window succeeds with no exceptions or errors.
Why did the method fail in the sandbox test framework but succeed in the Developer Console?

A. The test method is calling an @future method.
B. The test method has a syntax error in the code.
C. The test method does not use system. runAs to execute as a specific user.
D. The test method relies on existing data in the sandbox.

解説：