Higher Test Marks with Free Online DEX-450 Exam Practice

Assess the CertsIQ’s updated DEX-450 exam questions for free online practice of your Programmatic Development using Apex and Visualforce in Lightning Experience (WI25) test. Our DEX450 dumps questions will enhance your chances of passing the Salesforce Platform Developer I certification exam with higher marks.

Exam Code: DEX-450
Exam Questions: 387
Programmatic Development using Apex and Visualforce in Lightning Experience (WI25)
Updated: 27 Apr, 2026
Question 1

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?

Options :
Answer: B

Question 2

What are three characteristics of change set deployments?
Choose 3 answers

Options :
Answer: A,B

Question 3

Which two sfdx commands can be used to add testing data to a Developer sandbox?

Options :
Answer: A,C

Question 4

A developer identifies the following triggers on the Expense_c object:
DeleteExpense,




applyDefaultstoexpense
validateexpenseupdate;
The triggers process before delete, before insert, and before update events respectively.
Which two techniques should the developer implement to ensure trigger best practice are
followed?

Options :
Answer: C,D

Question 5

A developer needs to allow users to complete a form on an Account record that will create a record for a custom object. The form needs to display different fields depending on the user's job role. The functionality should only be available to a small group of users.
Which three things should the developer do to satisfy these requirements?
Choose 3 answers

Options :
Answer: A,B

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