100% Free DEX-450 Practice Exam Questions and Answers

Stay Ahead with Latest DEX-450 Salesforce Platform Developer I Practice Test Questions 2026

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Total 387 Questions | Updated On: Oct 24, 2026

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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?

A : Apex classes must have at least 75% code coverage org-wide.

B : At least one line of code must be executed for the Apex trigger.

C : All methods in the test classes must use @isTest.

D : Test methods must be declared with the testMethod keyword.

Answer: A,B

Question 2

A developer completed modifications feature that is comprised of two elements:* Apex trigger* Trigger handler Apex classWhat are two factors that the developer must take into account to properly deploy them to the productionenvironment?Choose 2 answers

A : Apex classes must have at least 75% code coverage org-wide.

B : All methods in the test classes must use @istest.

C : At least one line of code must be executed for the Apex trigger.

D : Test methods must be declared with the testMethod keyword.

Answer: A,C

Question 3

What can be easily developed using the Lightning Component framework?

A : Customized JavaScript buttons

B : Salesforce Classic user Interface pages

C : Lightning Pages

D : Salesforce integrations

Answer: C

Question 4

A developer needs to make a custom Lightning Web Component available in the Salesforce Classic user interface. Which approach can be used to accomplish this?

A : Wrap the Lightning Web Component In an Aura Component and surface the Aura Component as a Visualforce tab.

B : Embed the Lightning Web Component is a Visualforce Component and add directly to the page layout.

C : Use the Lightning Out JavaScript library to embed the Lightning Web Component in a Visualforce page and add to the page layout.

D : Use a Visualforce page with a custom controller to invoke the Lightning Web Component using a call to an Apex method.

Answer: C

Question 5

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

Page: 1 / 78

Total 387 Questions | Updated On: Oct 24, 2026

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