DEX-450 Exam Details

  • Exam Code
    :DEX-450
  • Exam Name
    :Programmatic Development using Apex and Visualforce in Lightning
  • Certification
    :Salesforce Certifications
  • Vendor
    :Salesforce
  • Total Questions
    :456 Q&As
  • Last Updated
    :Jul 10, 2026

Salesforce DEX-450 Online Questions & Answers

  • Question 431:

    What is true for a partial sandbox that is not true for a full sandbox? Choose 2 answers: A. More frequent refreshes.

    B. Only Includes necessary metadata.
    C. Use of change sets.
    D. Limited to 5 GB of data.

  • Question 432:

    What is a capability of formula fields? (Choose 3)

    A. Generate a link using the HYPERLINK function to a specific record in a legacy system.
    B. Display the previous values for a field using the PRIORVALUE function.
    C. Return and display a field value from another object using the VLOOKUP function.
    D. Determine if a datetime field has passed using the NOW function.
    E. Determine which of three different images to display using the IF function.

  • Question 433:

    The following Apex method is part of the ContactService class that is called from a trigger: public static void setBusinessUnitToEMEA(Contact thisContact){ thisContact.Business_Unit__c = "EMEA" ; update thisContact; } How should the developer modify the code to ensure best practice are met?

    A. Public static void setBusinessUnitToEMEA(List contacts){ for(Contact thisContact : contacts){ thisContact.Business_Unit__c = 'EMEA' ; update contacts[0]; } }
    B. Public static void setBusinessUnitToEMEA(List contacts){ for(Contact thisContact : contacts) { thisContact.Business_Unit__c = 'EMEA' ; } update contacts; }
    C. Public static void setBusinessUnitToEMEA(Contact thisContact){ List contacts = new List(); contacts.add(thisContact.Business_Unit__c = 'EMEA'); update contacts; }
    D. Public void setBusinessUnitToEMEA(List contatcs){ contacts[0].Business_Unit__c = 'EMEA' ; update contacts[0]; }

  • Question 434:

    An sObject named Application_c has a lookup relationship to another sObject named Position_c. Both Application _c and Position_c have a picklist field named Status_c.When the Status_c field on Position_c is updated, the Status_c field on Application_c needs to be populated automatically with the same value, and execute a workflow rule on Application_c.

    How can a developer accomplish this?

    A. By changing Application_c.Status_c into a roll -up summary field.
    B. By changing Application_c.Status_c into a formula field.
    C. By using an Apex trigger with a DML operation.
    D. By configuring a cross-object field update with a workflow.

  • Question 435:

    A developer encounters APEX heap limit errors in a trigger.

    Which two methods should the developer use to avoid this error? (Choose two.)

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

  • Question 436:

    Which three resources in a Lightning Component Bundle can contain JavaScript functions? Choose 3

    A. Renderer
    B. Design
    C. Helper
    D. Controller
    E. Style

  • Question 437:

    A developer has created a Visualforce Page and Apex Controller that uses the With Sharing keyword. The page will be used of by Sales Managers and should only display Accounts owned by Sales Representatives who report to the running Sales Manager. The organization-wide sharing for Accounts is set to Private. Which additional set of stops should the developer take?

    A. Create one Profile, two Permission Sets, and one Role.
    B. Create one Profile, one Permission Set, and one Role.
    C. Create one Profile, one Permission Set, and two Roles.
    D. Create two Profiles, one Permission Set, and one Role.

  • Question 438:

    A developer needs to write a method that searches for a phone number that could be on multiple object types. Which method should the developer use to accomplish this task?

    A. SOQL Query that includes ALL ROWS
    B. SOQL query on each object
    C. SOSL Query that includes ALL ROWS
    D. SOSL query on each object

  • Question 439:

    Which three web technologies can be integrated into a Visualforce page? Choose 3 answares

    A. HTML (Missed)
    B. Java
    C. PHP
    D. CSS (Missed)
    E. JavaScript (Missed)

  • Question 440:

    When loading data into an operation, what can a developer do to match records to update existing records? (Choose 2)

    A. Match an auto-generated Number field to a column in the imported file.
    B. Match an external Id Text field to a column in the imported file.
    C. Match the Name field to a column in the imported file.
    D. Match the Id field to a column in the imported file.

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