Free DEX-450 Exam Braindumps
Programmatic Development using Apex and Visualforce in Lightning Experience Questions 141–145 (page: 30)

Updated On: 10-Feb-2026

A developer uses a before insert trigger on the Lead object to fetch the Territory__c object, where the Territory__c.PostalCode__c matches the Lead.PostalCode.
The code fails when the developer uses the Apex Data Loader to insert 10, 000 Lead records.

The developer has the following code block:
Line-01: for (Lead l : Trigger.new)
{
Line-02: if (l.PostalCode != null) {
Line-03: List<Territory__c> terrList = [SELECT Id FROM Territory__c WHERE PostalCode__c = :l.PostalCode];
Line-04: if(terrList.size() > 0) Line-05: l.Territory__c = terrList[0].Id;
Line-06: }
Line-07:}

Which line of code is causing the code block to fail?

  1. Line-03: A, SOQL query is located inside of the for loop code.
  2. Line-01: Trigger:new is not valid in a before insert Trigger.
  3. Line-02: A, NullPointer exception is thrown if PostalCode is null.
  4. Line-05: The Lead in a before insert trigger cannot be updated.

Answer(s): A



What would a developer do to update a picklist field on related Opportunity records when a
modification to the associated Account record is detected?

  1. Create a process with Process Builder.
  2. Create a workflow rule with a field update.
  3. Create a Lightning Component.
  4. Create a Visualforce page.

Answer(s): A



Which requirement needs to be implemented by using standard workflow instead of Process Builder? Choose 2 answers

  1. Create activities at multiple intervals.
  2. Send an outbound message without Apex code.
  3. Copy an account address to its contacts.
  4. Submit a contract for approval.

Answer(s): B,C



An org has different Apex Classes that provide Account -related functionality.After a new validation rule is added to the object, many of the test methods fail.What can be done to resolve the failures and reduce the number of code changes needed for future validation rules?Choose 2 answers:

  1. Create a method that creates valid Account records, and call this method from within test methods.
  2. Create a method that loads valid Account records from a Static Resource, and call this method within test methods.
  3. Create a method that performs a callout for a valid Account record, and call this method from within test methods.
  4. Create a method that queries for valid Account records, and call this method from within test methods.

Answer(s): A,B



Which component is available to deploy using Metadata API? Choose 2 answers

  1. Case Layout
  2. Account Layout
  3. Case Feed Layout
  4. ConsoleLayout

Answer(s): A,B



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