Free Practice Salesforce DEX-450 Exam Questions 2025

Stay ahead with 100% Free Programmatic Development using Apex and Visualforce in Lightning Experience (WI25) DEX-450 Dumps Practice Questions

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Total 387 Questions | Updated On: Mar 26, 2025

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Question 1

A developer is tasked with performing a complex validation using Apex as part of advanced business logic. certain criteria are met for a PurchaseOrder, the developer must throw a custom exception.

What is the correct way for the developer to declare a class that can be used as an exception?

A : public class PurchaseOrderException implements Exception ()

B : public class PurchaseOrderException extends Exception ()

C : public class PurchaseOrder implements Exception ()

D : public class PurchaseOrder extends Exception ()

Answer: B

Question 2

Which two scenarios require an Apex method to be called imperatively from a Lightning web component?

Choose 2 answer

A : Calling a method that makes a web service callout

B : Calling a method that is not annotated with cacheable-true

C : Calling a method with the click of a button

D : Calling a method that is external to the main controller for the Lightning web component

Answer: B,D

Question 3

What can be used to override the Account's standard Edit button for Lightning Experience7

A : Lightning action

B : Lightning component

C : Lightning page

D : Lightning flow

Answer: B

Question 4

Which annotation should a developer use on an Apex method to make it available to be wired to a property in

a Lightning web component?

A : @RemoteAction

B : @AureEnabled

C : @AureEnabled (cacheable=true)

D : @RemoteAction(|cacheable=true)

Answer: C

Question 5

An org tracks customer orders on an Order object and the items of an Order on the Line Item object. The Line Item object has a MasterDetail relationship to the order object. A developer has a requirement to calculate the order amount on an Order and the line amount on each Line item based on quantity and price.

What is the correct implementation?

A : Implement the line amount as a numeric formula field and the order amount as a roll-up summary field.

B : Write a single before trigger on the Line Item that calculates the item amount and updates the order amount on the Order.

C : Implement the Line amount as a currency field and the order amount as a SUM formula field.

D : Write a process on the Line item that calculates the item amount and order amount and updates the filed on the Line Item and the order.

Answer: A

Page: 1 / 78

Total 387 Questions | Updated On: Mar 26, 2025

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