Free Salesforce DEX-450 Exam Questions

Become Salesforce Certified with updated DEX-450 exam questions and correct answers

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Total 387 Questions | Updated On: Jan 29, 2026

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Question 1

As part of new feature development, a developer Is asked to build a responsive application capable of

responding to touch events, that will be executed on stateful clients.

Which two technologies are built on a framework that fully supports the business requirement? Choose 2 answers

A : Aura Components

B : Visualforce Pages

C : Lightning Web Components

D : Visualforce Components

Answer: A,C

Question 2

A developer has to identify a method in en Apex class that performs resource intensive actions in memory by iterating over the result set of a SOQL statement on the account. The method also performs a SOQL statement to save the changes to the database.

Which two techniques should the developer implement as a best practice to ensure transaction control and avoid exceeding governor limits?

Choose 2 answers

A : Use the @ReadOnly annotation to bypass the number of rows returned by a SOQL.

B : Use Partial DHL statements to ensure only valid data is committed.

C : Use the Database.Savepoint method to enforce database integrity.

D : Use the System.Limit class to monitor the current CPU governor limit consumption.

Answer: C,D

Question 3

Which statement describes the execution order when trigger are associated to the same object and event?

A : Triggers are executed in the order they are created..

B : Trigger execution order cannot be guaranteed.

C : Triggers are executed in the order they are modified

D : Triggers are executed alphabetically by trigger name.

Answer: B

Question 4

A developer wrote Apex code that calls out to an external system. How should a developer write the test to provide test coverage?

A : Write a class that extends HTTPCalloutMock.

B : Write a class that implements the HTTPCalloutMock interface.

C : Write a class that implements the WebserviceMock interface.

D : Write a class that extends WebserviceMock

Answer: B

Question 5

Use @TestVisible to allow the test method to see the standard PriceBook.

A : < apex:outputField value='{!ctrl.userInput}' / >

B : < apex:outputText escape='false' value=' {!$CurrentPage.parameters.userInput}' / >

C : < apex:outputText value='{!CurrentPage.parameters.userInput}' / >

D : < apex:outputField escape='false' value='{!ctrl.userInput}' / >

Answer: B

Page: 1 / 78

Total 387 Questions | Updated On: Jan 29, 2026

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