Salesforce Salesforce Certifications DEX-450 Questions & Answers

• Question 41:

  A developer creates a method in an Apex class and needs to ensure that errors are handled properly. What would the developer use? (There are three correct answers.)

  A. ApexPages.addErrorMessage()

  B. A custom exception

  C. .addError()

  D. Database.handleException()

  E. A try/catch construct

  Correct Answer: BCE

• Question 42:

  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.

  Correct Answer: C

• Question 43:

  A developer working on a time management application wants to make total hours for each timecard available to applications users. A timecard entry has a Master-Detail relationship to a timecard. Which approach should the developer use to accomplish this declaratively?

  A. A visualforce page that calculates the total number of hours for a timecard and displays it on the page.

  B. An Apex trigger that uses an Aggregate Query to calculate the hours for a given timecard and stores it in a custom field.

  C. A Roll-up Summary field on the Timecard Object that calculates the total hours from timecard entries for that timecard.

  D. A Process Builder process that updates a field on the timecard entry is created.

  Correct Answer: C

• Question 44:

  What should a developer use to implement an automate approval process submission for case?

  A. Process builder.

  B. An assignment rules.

  C. A workflow rules.

  D. Scheduled apex.

  Correct Answer: A

• Question 45:

  The account object has a custom percent field, rating, defined with a length of 2 with 0 decimal places. An account record has the value of 50% in its rating field and is processed in the apex code below after being retrieved from the database with SOQL public void processaccount(){ decimal acctscore = acc.rating__c * 100; }

  What is the value of acctscore after this code executes?

  A. 5

  B. 50

  C. 500

  D. 5000

  Correct Answer: C

• Question 46:

  On a Visualforce page with a custom controller, how should a developer retrieve a record by using an ID that is passed on the URL?

  A. Use the constructor method for the controller.

  B. Use the $Action.View method in the Visualforce page.

  C. Create a new PageReference object with the Id.

  D. Use the tag in the Visualforce page.

  Correct Answer: A

• Question 47:

  How can a developer avoid exceeding governor limits when using Apex Triggers? (Choose 2)

  A. By using a helper class that can be invoked from multiple triggers

  B. By using Maps to hold data from query results

  C. By using the Database class to handle DML transactions

  D. By performing DML transactions on a list of sObjects.

  Correct Answer: BD

• Question 48:

  In Lightning component framework, which resource can be used to fire events? Choose 2 answers.

  A. Third-party Javascript code

  B. Javascript controller actions

  C. Visualforce controller actions

  D. Third-party web service code

  Correct Answer: AB

• Question 49:

  What are two correct examples of the model in the salesforce MVC architecture? Choose 2 answers.

  A. Custom field on the custom wizard_c object

  B. Standard lightning component

  C. Workflow rule on the contact object

  D. Standard account lookup on the contract object

  Correct Answer: BC

• Question 50:

  What can a developer use to determine if the core Apex code exceeds any governor limits in a test class during bulk execution?

  A. Limits, startTest, stopTest

  B. Test.getDmlStatements()

  C. @TestSetup.

  D. @TestVisible

  Correct Answer: A