Salesforce Salesforce Certifications DEX-450 Questions & Answers

• Question 411:

  What are two uses for External IDs? (Choose two.)

  A. To create relationships between records imported from an external system.

  B. To create a record in a development environment with the same Salesforce ID as in another environment

  C. To identify the sObject type in Salesforce

  D. To prevent an import from creating duplicate records using Upsert

  Correct Answer: AD

• Question 412:

  Which approach should be used to provide test data for a test class?

  A. Query for existing records in the database.

  B. Execute anonymous code blocks that create data.

  C. Use a test data factory class to create test data.

  D. Access data in @TestVisible class variables.

  Correct Answer: C

• Question 413:

  A developer created a Visualforce page and a custom controller with methods to handle different buttons and events that can occur on the page.

  What should the developer do to deploy to production?

  A. Create a test class that provides coverage of the Visualforce page.

  B. Create a test page that provides coverage of the Visualforce page.

  C. Create a test page that provides coverage of the custom controller.

  D. Create a test class that provides coverage of the custom controller.

  Correct Answer: D

• Question 414:

  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();

  Correct Answer: A

• Question 415:

  Which set of roll-up types are available when creating a roll-up summary field?

  A. COUNT, SUM, MIN, MAX

  B. AVERAGE, SUM, MIN, MAX

  C. SUM, MIN, MAX

  D. AVRAGE, COUNT, SUM, MIN, MAX

  Correct Answer: A

• Question 416:

  A developer needs to join data received from an integration with an external system with parent records in Salesforce. The data set does not contain the Salesforce IDs of the parent records, but it does have a foreign key attribute that can be used to identify the parent.

  Which action will allow the developer to relate records in the data model without knowing the Salesforce ID?

  A. Create and populate a custom field on the parent object marked as Unique.

  B. Create a custom field on the child object of type External Relationship.

  C. Create and populate a custom field on the parent object marked as an External ID.

  D. Create a custom field on the child object of type Foreign Key.

  Correct Answer: D

• Question 417:

  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.

  Correct Answer: BC

• Question 418:

  A developer created a Lightning component to display a short text summary for an object and wants to use it with multiple Apex classes.

  How should the developer design the Apex classes?

  A. Have each class define method getObject() that returns the sObject that is controlled by the Apex class.

  B. Extend each class from the same base class that has a method getTextSummary() that returns the summary.

  C. Have each class implement an interface that defines method getTextSummary() that returns the summary.

  D. Have each class define method getTextSummary() that returns the summary.

  Correct Answer: C

• Question 419:

  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.

  Correct Answer: D

• Question 420:

  Which three options can be accomplished with formula fields? (Choose three.)

  A. Generate a link using the HYPERLINK function to a specific record.

  B. Display the previous value for a field using the PRIORVALUE function.

  C. Determine if a datetime field value has passed using the NOW function.

  D. Return and display a field value from another object using the VLOOKUP function.

  E. Determine which of three different images to display using the IF function.

  Correct Answer: ACE