Free Salesforce DEX-450 Exam Questions

Become Salesforce Certified with updated DEX-450 exam questions and correct answers

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Total 387 Questions | Updated On: Mar 25, 2025

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Question 1

A developer needs to confirm that a Contact trigger works correctly without changing the organization's dat

a. what should the developer do to test the Contact trigger?

A : the New button on the Salesforce Contacts Tab to create a new Contact record.

B : the Open execute Anonymous feature on the Developer Console to run an 'insert Contact' DML statement

C : Deploy from the VSCode IDE to display an 'insert Contact' Apex class.

D : the Test menu on the Developer Console to run all test classes for the Contact trigger

Answer: D

Question 2

Universal Containers wants Opportunities to be locked from editing when reaching the Closed/Won stage.

Which two strategies should a developer use to accomplish this? Choose 2 answers

A : a validation rule.

B : a trigger.

Answer: A,B

Question 3

A developer has an integer variable called maxAttempts. The developer meeds to ensure that once maxAttempts is initialized, it preserves its value for the lenght of the Apex transaction; while being able to share the variable's state between trigger executions. How should the developer declare maxAttempts to meet these requirements?

A : clare maxattempts as a member variable on the trigger definition.

B : clare maxattempts as a private static variable on a helper class

C : clare maxattempts as a constant using the static and final keywords

D : clare maxattempts as a variable on a helper class

Answer: C

Question 4

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 has a syntax error In the code.

B : The test method does not use System. rurAs to execute as a specific user.

C : The test method Is calling an future method.

D : The test method relies on existing data in the sandbox.

Answer: D

Question 5

A developer wrote an Apex method to update a list of Contacts and wants to make it available for use by Lightning web components.

Which annotation should the developer add to the Apex method to achieve this?

A :