Free DEX-450 Mock Exam – Practice Online Confidently

Increase your chances of passing the Salesforce DEX-450 exam questions on your first try. Practice with our free online DEX-450 exam mock test designed to help you prepare effectively and confidently.

Exam Code: DEX-450
Exam Questions: 387
Programmatic Development using Apex and Visualforce in Lightning Experience (WI25)
Updated: 15 Jul, 2026
Question 1

When a user edits the Postal Code on an Account, a custom Account text field named 'Timezone' must be update based on the values in a PostalCodeToTimezone__c custom object. How should a developer implement this feature?

Options :
Answer: B

Question 2

Given the following block code: try{ List retrievedRecords = [SELECT Id FROM Account WHERE Website = null]; }catch(Exception e){ //manage exception logic } What should a developer do to ensure the code execution is disrupted if the retrievedRecordslist remains empty after the SOQL query?

Options :
Answer: B

Question 3

A developer is creating an app that contains multiple Lightning web components.
One of the child components is used for navigation purposes. When a user click a button called.. component, the parent component must be alerted so it can navigate to the next page.
How should this be accomplished?

Options :
Answer: D

Question 4

Which three process automations can immediately send an email notification to the owner of an Opportunity when its Amount is changed to be greater than $10,000? Choose 3 answers

Options :
Answer: A,C

Question 5

When importing and exporting data into Salesforce, which two statements are true?
Choose 2 answers

Options :
Answer: C,D

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