DEX-450 Programmatic Development using Apex and Visualforce in Lightning Experience exam is a hot Salesforce certification exam, Exam4Training offers you the latest free online DEX-450 dumps to practice. You can get online training in the following questions, all these questions are verified by Salesforce experts. If this exam changed, we will share new update questions.
Which statement would a developer use when creating test data for products and pricebooks?
A . Id pricebookId = Test.getStandardPricebookId();
B . Pricebook pb = new Pricebook();
C . IsTest(SeeAllData = false);
D . List objList = Test.loadData(Account.sObjectType, ‘myResource’);
Answer: A
A developer needs to test an Invoicing system integration. After reviewing the number of transactions required for the test, the developer estimates that the test data will total about 2 GB of data storage. Production data is not required for the integration testing.
Which two environments meet the requirements for testing? (Choose two.)
A . Developer Sandbox
B . Full Sandbox
C . Developer Edition
D . Partial Sandbox
E . Developer Pro Sandbox
Answer: B,D
A developer needs to display all of the available fields for an object.
In which two ways can the developer retrieve the available fields if the variable myObject represents the name of the object? (Choose two.)
A . Use myObject.sObjectType.getDescribe().fieldSet() to return a set of fields.
B . Use mySObject.myObject.fields.getMap() to return a map of fields.
C . Use Schema.describeSObjects(new String[]{myObject})[0].fields.getMap() to return a map of fields.
D . Use getGlobalDescribe().get(myObject).getDescribe().fields.getMap() to return a map of fields.
Answer: B,C
A developer needs to create a Visualforce page that will override the standard Account edit button. The page will be used to validate the account’s address using a SOQL query. The page will also allow the user to make edits to the address.
Where would the developer write the Account address verification logic?
A . In a Standard Extension.
B . In a Standard Controller.
C . In a Custom Controller.
D . In a Controller Extension.
Answer: D
How should a developer create a new custom exception class?
A . public class CustomException extends Exception{}
B . CustomException ex = new (CustomException)Exception();
C . public class CustomException implements Exception{}
D . (Exception)CustomException ex = new Exception();
Answer: A
A developer wants to create a custom object to track Customer Invoices.
How should Invoices and Accounts be related to ensure that all Invoices are visible to everyone with access to an Account?
A . The Account should have a Master-Detail relationship to the Invoice.
B . The Invoice should have a Master-Detail relationship to the Account
C . The Account should have a Lookup relationship to the Invoice
D . The Invoice should have a Lookup relationship to the Account Previous
Answer: B
What is the proper process for an Apex Unit Test
A . Query for test data using SeeAllData = true. Call the method being tested. Verify that the results are correct.
B . Query for test data using SeeAllData = true. Execute runAllTests(). Verify that the results are correct.
C . Create data for testing. Execute runAllTests(). Verify that the results are correct.
D . Create data for testing. Call the method being tested. Verify that the results are correct.
Answer: D
A developer wrote a unit test to confirm that a custom exception works properly in a custom controller, but the test failed due to an exception being thrown.
Which step should the developer take to resolve the issue and properly test the exception?
A . Use try/catch within the unit test to catch the exception.
B . Use the finally bloc within the unit test to populate the exception.
C . Use the database methods with all or none set to FALS
E . Use Test.isRunningTest() within the custom controller.
Answer: A
A Visualforce page has a standard controller for an object that has a lookup relationship to a parent object.
How can a developer display data from the parent record on the page?
A . By adding a second standard controller to the page for the parent record.
B . By using a roll-up formula field on the child record to include data from the parent record.
C . By using SOQL on the Visualforce page to query for data from the parent record.
D . By using merge field syntax to retrieve data from the parent record.
Answer: D
Which statement about change set deployments is accurate? (Choose 3)
A . They use an all or none deployment model.
B . They require a deployment connection.
C . They ca be used to transfer Contact records.
D . They can be used to deploy custom settings data.
E . They can be used only between related organizations.
Answer: A, B, E