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
    :May 29, 2026

Salesforce DEX-450 Online Questions & Answers

  • Question 131:

    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 avaible. Which method should be used to calculate the estimated ship date for an Order?

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

  • Question 132:

    Which actions can a developer perform using the Schema Builder?Choose 2 answers

    A. Create a custom field and automatically add it to an existing page layout.
    B. Create a view containing only standard and system objects.
    C. Create a custom object and define a lookup relationship on that object
    D. Create a view of objects and relationships without fields

  • Question 133:

    Which two are true regarding a Dyno? Choose 2 answers

    A. Is a light weight VM used to run code on the Heroku Platform
    B. Has the ability to sleep as a standard and performance Dyno
    C. Is a lightweight Linux container used in a collection to run Heroku applications
    D. Has Ephemeral filesystems and is rebooted every 24 hours.

  • Question 134:

    A developer must provide a custom user interface when users edit a Contact. Users must be able to use the interface in Salesforce Classic and Lightning Experience. What should the developer do to provide the custom user interface?

    A. Override the Contact's Edit button with a Lightning page Salesforce Classic and a Visualforce page in Lightning Experience.
    B. Override the Contact's Edit button with a Visualforce page in Salesforce Classic and a Lightning page in Lightning experience.
    C. Override the Contact's Edit button with a Visualforce page in Salesforce Classic and a Lightning component in Lightning Experience.
    D. Override the Contact's Edit button with a Lightning component in Salesforce Classic and a Lightning component in Lightning experience.

  • Question 135:

    A platform developer at Universal Containers needs to create a custom button for the Account object that, when clicked, will perform a series of calculations and redirect the user to a custom Visualforce page. Which three attributes need to be defined with values in the tag to accomplish this? (Choose three.)

    A. action
    B. renderAs
    C. standardController
    D. readOnly
    E. extensions

  • Question 136:

    Why would a developer consider using a custom controller over a controller extension?

    A. To increase the SOQL query governor limits.
    B. To implement all of the logic for a page and bypass default Salesforce functionality
    C. To leverage built-in functionality of a standard controller
    D. To enforce user sharing settings and permissions

  • Question 137:

    The operation manager at a construction company uses a custom object called Machinery to manage the usage and maintenance of its cranes and other machinery. The manager wants to be able to assign machinery to different constructions jobs, and track the dates and costs associated with each job. More than one piece of machinery can be assigned to one construction job.

    What should a developer do to meet these requirements?

    A. Create a lookup field on the Construction Job object to the Machinery object.
    B. Create a lookup field on the Machinery object to the Construction Job object.
    C. Create a junction object with Master-Detail Relationship to both the Machinery object and the Construction Job object.
    D. Create a Master-Detail Lookup on the Machinery object to the Construction Job object.

  • Question 138:

    Which trigger event allows a developer to update fields in the Trigger.new list without using an additional DML statement?Choose 2 answers

    A. Before insert
    B. Before update
    C. After update
    D. After insert

  • Question 139:

    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?

    A. Build a OpportunityLineItem trigger that adds a PriceBookEntry record.
    B. Build an OpportunityLineItem trigger to add an OpportunityLineItem record.
    C. Build an Opportunity trigger that adds a PriceBookEntry record.
    D. Build an Opportunity trigger that adds an OpportunityLineItem record.

  • Question 140:

    A developer must create a Lightning component that allows user to input Contact record information to create a Contact record, including a Salary__c custom field. What should the developer use, along with a lightning-record-edit-form, so that Salary__c field functions as a currency input and is only viewable and editable by users that have the correct field level permissions on Salary__c?

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