Salesforce DEX-450 Exam Questions Answers

Salesforce DEX-450 Study Questions for Exam 2026

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Build Applications Programmatically on the Salesforce Platform Exam DEX-450 Questions and Answers

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Page: 1 / 34
Total Questions: 169

Questions & Answers PDF

• Question 1

  

  A developer observes that an Apex test method fails in the Sandbox. To identify the issue, the developer copies the code inside the test method and executes it via the Execute Anonymous tool in the Developer Console. The code then executes with no exceptions or errors. Why did the test method fail in the sandbox and pass in the Developer Console?

  • The test method has a syntax error in the code.
  • The test method relies on existing data in the sandbox.
  • The test method is calling an @future method.
  • The test method does not use System.runAs to execute as a specific user.

  Reveal Answer Answer: B Next Question

• Question 2

  

  A developer must provide custom user interfaces when users edit a Contact in either Salesforce Classic or Lightning Experience.What should the developer use to override the Contact's Edit button and provide this functionality?

  • A Visualforce page in Salesforce Classic and a Lightning component in Lightning Experience
  • A Lightning component in 5alesforce Classic and a Lightning component in lightning Experience
  • A Visualforce page in Salesforce Classic and a Lightning page in Lightning Experience
  • A Lightning page in Salesforce Classic and a Visualforce page in Lightning Experience

  Reveal Answer Answer: A Next Question

• Question 3

  

  Universal Containers stores the availability date on each Line Item of an Order and Orders are only shipped when all of the Line Items are available. Which method should be used to calculate the estimated ship date for an Order?

  • Use a CEILING formula on each of the Latest availability date fields.
  • Use a DAYS formula on each of the availability date fields and a COUNT Roll-Up Summary field on the Order.
  • Use a LATEST formula on each of the latest availability date fields.
  • Use a Max Roll-Up Summary field on the Latest availability date fields.

  Reveal Answer Answer: D Next Question

• Question 4

  

  A developer must create a CreditcardPayment class that provides an implementation of an existing Payment class. Public virtual class Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } } Which is the correct implementation?

  • Public class CreditcardPayment extends Payment { public override void makePayment(Decimal amount) { /*implementation*/ } }
  • Public class CreditCardPayment implements Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } }
  • Public class CreditCardPayment extends Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } }
  • Public class CreditCardPayment implements Payment { public override void makePayment(Decimal amount) { /*Implementation*/ } }

  Reveal Answer Answer: A Next Question

• Question 5

  

  The values 'High', 'Medium', and 'Low' are Identified as common values for multiple picklist across different object. What is an approach a developer can take to streamline maintenance of the picklist and their values, while also restricting the values to the ones mentioned above?

  • Create the Picklist on each object and use a Global Picklist Value Set containing the Values.
  • Create the Picklist on each object as a required field and select 'Display values alphabeticaly, not in the order entered'.
  • Create the Picklist on each object and select 'Restrict picklist to the values defined in the value set'.
  • Create the Picklist on each and add a validation rule to ensure data integrity.

  Reveal Answer Answer: A Next Question

• Question 6

  

  Uniersal Containers (UC) is developing a process for their sales teams that requires all sales reps to go through a set of scripted steps with each new customer they create.In the first steps of collecting information, UC's ERP system must be checked via as a REST endpoint to see if the customerexists. If the customer exists, the data must be presented to the sales rep in Salesforce.Which two should a developer implement to satisfy the requirements?Choose2 answer

  • Flow
  • Future method
  • Trigger
  • Invocable method

  Reveal Answer Answer: B, D Next Question

• Question 7

  

  Which three Salesforce resources can be accessed from a Lightning web component?Choose 3 answers

  • SVG resources
  • Third-party web components
  • Content asset files
  • Static resources
  • All external libraries

  Reveal Answer Answer: A, D, E Next Question

• Question 8

  

  What are two ways for a developer to execute tests in an org?

  • Tooling API
  • Developer console
  • Bulk API
  • Matadata API

  Reveal Answer Answer: A, B Next Question

• Question 9

  

  What should a developer do to check the code coverage of a class after running all tests?

  • View the Code Coverage column in the list view on the Apex Classes page.
  • View the Class Test Percentage tab on the Apex Class fist view m Salesforce Setup.
  • View Use cede coverage percentage for the class using the Overall Code Coverage panel in the Developer Console Tests tab.
  • Select and run the class on the Apex Test Execution page in the Developer Console.

  Reveal Answer Answer: B Next Question

• Question 10

  

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

  • Write a class that extends HTTPCalloutMock.
  • Write a class that implements the HTTPCalloutMock interface.
  • Write a class that implements the WebserviceMock interface.
  • Write a class that extends WebserviceMock

  Reveal Answer Answer: B Next Question

Page: 1 / 34
Total Questions: 169

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