Free DEX-450 Mock Exam – Practice Online Confidently

Increase your chances of passing the Salesforce DEX-450 exam questions on your first try. Practice with our free online DEX-450 exam mock test designed to help you prepare effectively and confidently.

Exam Code: DEX-450
Exam Questions: 387
Programmatic Development using Apex and Visualforce in Lightning Experience (WI25)
Updated: 23 May, 2026
Question 1

Which two characteristics are true for Aura component events?

Options :
Answer: A,D

Question 2

What will be the output in the debug log in the event of a QueryExeption during a call to the @query method in the following Example?

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Options :
Answer: C

Question 3

Which two are phases in the Salesforce Application Event propagation framework? Choose
2 answers

Options :
Answer: B,C

Question 4

A developer created a trigger on the Account object and wants to test if the trigger is properly bulklfield. The developer team decided that the trigger should be tested with 200 account records with unique names.What two things should be done to create the test data within the unit test with the least amount of code? Choose 2 answersA developer created a trigger on the Account object and wants to test if the trigger is properly bulklfield. The developer team decided that the trigger should be tested with 200 account records with unique names.What two things should be done to create the test data within the unit test with the least amount of code?Choose 2 answers

Options :
Answer: B,D

Question 5

Universal Containers has large number of custom applications that were built using a third-party javaScript framework and exposed using Visualforce pages. The Company wants to update these applications to apply styling that resembles the look and feel of Lightning Experience. What should the developer do to fulfill the business request in the quickest and most effective manner?

Options :
Answer: A

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