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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: 20 Aug, 2025
Question 1

Cloud kicks has a multi-screen flow that its call center agents use when handling inbound service desk calls.
At one of the steps in the flow, the agents should be presented with a list of order numbers and dates that are retrieved from an external order management system in real time and displayed on the screen.
What should a developer use to satisfy this requirement?

Options :
Answer: B

Question 2

Universal Containers implemented a private sharing model for the Account object. A custom Account search tool was developed with Apex to help sales representatives find accounts that match multiple criteria they specify. Since its release, users of the tool report they can see Accounts they do not own. What should the developer use to enforce sharing permission for the currently logged-in user while using the custom search tool?

Options :
Answer: D

Question 3

A developer has two custom controller extensions where each has a save() method.
Which save() method will be called for the following Visualforce page?
< apex:page standardController =''Account'', extensions=''ExtensionA, ExtensionB'' >
< apex:commandButton action =''{!save}'' value=''Save''/ >
< /apex:page >

Options :
Answer: A

Question 4

Universal Containers needs to create a custom user interface component that allows users to enter information

about their accounts.

The component should be able to validate the user input before saving the information to the database.

What is the best technology to create this component?

Options :
Answer: B

Question 5

A developer created a custom order management app that uses an Apex class. The order is represented by an Order object and an Orderltem object that has a master-detail relationship to Order. During order processing, an order may be split into multiple orders.
What should a developer do to allow their code to move some existing Orderltem records to a new Order record?

Options :
Answer: D

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