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Salesforce DEX-450 Exam Questions
Programmatic Development using Apex and Visualforce in Lightning Experience (Page 4 )

Updated On: 16-Feb-2026
Page 4 of 93
PDF with 456 Questions

A developer working on a time management application wants to make total hours for each timecard available to application users. A timecard entry has a Master-Detail relationship to a timecard.

Which approach should the developer use to accomplish this declaratively?

  1. A Visualforce page that calculates the total number of hours for a timecard and displays it on the page
  2. A Roll-Up Summary field on the Timecard Object that calculates the total hours from timecard entries for that timecard
  3. A Process Builder process that updates a field on the timecard when a timecard entry is created
  4. An Apex trigger that uses an Aggregate Query to calculate the hours for a given timecard and stores it in a custom field

Answer(s): B



A developer encounters APEX heap limit errors in a trigger.
Which two methods should the developer use to avoid this error? (Choose two.)

  1. Use the transient keyword when declaring variables.
  2. Query and store fields from the related object in a collection when updating related objects.
  3. Remove or set collections to null after use.
  4. Use SOQL for loops instead of assigning large queries results to a single collection and looping through the collection.

Answer(s): A,D



Which approach should be used to provide test data for a test class?

  1. Query for existing records in the database.
  2. Execute anonymous code blocks that create data.
  3. Use a test data factory class to create test data.
  4. Access data in @TestVisible class variables.

Answer(s): C



Which approach should a developer take to automatically add a "Maintenance Plan" to each Opportunity that includes an "Annual Subscription" when an opportunity is closed?

  1. Build a OpportunityLineItem trigger that adds a PriceBookEntry record.
  2. Build an OpportunityLineItem trigger to add an OpportunityLineItem record.
  3. Build an Opportunity trigger that adds a PriceBookEntry record.
  4. Build an Opportunity trigger that adds an OpportunityLineItem record.

Answer(s): D



Which two statements are true about using the @testSetup annotation in an Apex test class? (Choose two.)

  1. The @testSetup annotation cannot be used when the @isTest(SeeAllData=True) annotation is used.
  2. Test data is inserted once for all test methods in a class.
  3. Records created in the @testSetup method cannot be updates in individual test methods.
  4. The @testSetup method is automatically executed before each test method in the test class is executed.

Answer(s): D






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