Smartly Prepare Exam with Free Online DEX-450 Practice Test

We offer the latest DEX-450 practice test designed for free and effective online Programmatic Development using Apex and Visualforce in Lightning Experience (WI25) certification preparation. It's a simulation of the real DEX-450 exam experience, built to help you understand the structure, complexity, and topics you'll face on exam day.

Exam Code: DEX-450
Exam Questions: 387
Programmatic Development using Apex and Visualforce in Lightning Experience (WI25)
Updated: 25 Aug, 2025
Viewing Page : 1 - 39
Practicing : 1 - 5 of 387 Questions
Question 1

A develop completed modification to a customized 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 the modification to the production environment?

Options :
Answer: A,B

Question 2

Which two statements are accurate regarding Apex classes and interfaces?
Choose 2 answers

Options :
Answer: C,D

Question 3

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

Question 4

Assuming that 'name; is a String obtained by an <apex:inputText> tag on a Visualforce page.
Which two SOQL queries performed are safe from SOQL injections? Choose 2 answers

Options :
Answer: B,D

Question 5

A developer must troubleshoot to pinpoint the causes of performance issues when a custom page loads in their org. Which tool should the developer use to troubleshoot?

Options :
Answer: D

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

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