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: 28 Jan, 2026
Question 1

A developer completed modifications feature that is comprised of two elements:

* Apex trigger

* Trigger handler Apex class

What are two factors that the developer must take into account to properly deploy them to the production

environment?

Choose 2 answers

Options :
Answer: A,C

Question 2

A developer has a single custom controller class that works with a Visualforce Wizard to support creating and editing multiple subjects. The wizard accepts data from user inputs across multiple Visualforce pages and from a parameter on the initial URL.
Which three statements are useful inside the unit test to effectively test the custom controller?
Choose 3 answers

Options :
Answer: A,B,D

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 has a Apex controller for a Visualforce page that takes an ID as a URL parameter. How should the developer prevent a cross site scripting vulnerability?

Options :
Answer: B

Question 5

A company has a custom object, Sales, }_Help_Request__c, that has a Lookup relationship to Opportunity. The Seles Help Request__c has a mumber field, Number_ct_Hours__c, that represents the amount of time spent on the Sales_Help Request__C.
A developer is tasked with creating a field, total_Hour2__c, on Opportunity that should be the sum of all of the Number_of_Hours_c values for the Sales_Help_Request__c records related to that Opportunity.
What should the developer use to implement this?

Options :
Answer: B

Viewing Page : 1 - 39
Practicing : 1 - 5 of 387 Questions

© Copyrights CertsIQ 2026. All Rights Reserved

We use cookies to ensure that we give you the best experience on our website (CertsIQ). If you continue without changing your settings, we'll assume that you are happy to receive all cookies on the CertsIQ.