Salesforce DEX-450 Online Practice Questions and Exam Preparation

Salesforce DEX-450 Online Questions & Answers

• Question 331:

  A developer creates an Apex class that includes private methods. What can the developer do to ensure that the private methods can be accessed by the test class?

  A. Add the TestVisible attribute to the Apex class
  B. Add the SeeAllData attribute to the test methods.
  C. Add the TestVisible attribute to the apex methods.
  D. Add the SeeAllData attribute to the test class
  C. Add the TestVisible attribute to the apex methods.

• Question 332:

  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.
  B. By using Maps to hold data from query results
  D. By performing DML transactions on a list of sObjects.

• Question 333:

  A Hierarchy Custom Setting stores a specific URL for each profile in Salesforce. Which statement can a developer use to retrieve the correct URL for the current user'sprofile and display this on a Visualforce Page?

  A. {!$Setup.Url_Settings__C.Instance[Profile.Id].URL__c}
  B. {!$Setup.Url_Settings__C.URL__c}
  C. {!$Setup.Url_Settings__C.[Profile.Id].URL__c}
  D. {!$Setup.Url_Settings__C.[$Profile.Id].URL__c}
  B. {!$Setup.Url_Settings__C.URL__c}

• Question 334:

  An org has different Apex Classes that provide Account -related functionality.After a new validation rule is added to the object, many of the test methods fail. What can be done to resolve the failures and reduce the number of code changes needed for future validation rules?Choose 2 answers:

  A. Create a method that creates valid Account records, and call this method from within test methods.
  B. Create a method that loads valid Account records from a Static Resource, and call this method within test methods.
  C. Create a method that performs a callout for a valid Account record, and call this method from within test methods.
  D. Create a method that queries for valid Account records, and call this method from within test methods.
  A. Create a method that creates valid Account records, and call this method from within test methods.
  B. Create a method that loads valid Account records from a Static Resource, and call this method within test methods.

• Question 335:

  What is the result when a Visualforce page calls an Apex controller, which calls another Apex class, which then results in hitting a governor limit?

  A. Any changes up to the error are saved.
  B. Any changes up to the error are rolled back.
  C. All changes before a savepoint are saved.
  D. All changes are saved in the first Apex class.
  B. Any changes up to the error are rolled back.

• Question 336:

  A developer must troubleshoot to pinpoint the causes of performance issues when a custom page loads in their org. Which tool should the developer use to troubleshoot?

  A. AppExchange
  B. Salesforce CLI
  C. Visual Studio Core IDE
  D. Developer Console
  D. Developer Console

• Question 337:

  Which option should a developer use to create 500 Accounts and make sure that duplicates are not created for existing Account Sites?

  A. Data Import Wizard
  B. Salesforce-to-Salesforce
  C. Sandbox template
  D. Data Loader
  A. Data Import Wizard

• Question 338:

  A developer has the following query: Contact c = [SELECT id, firstname, lastname, email FROM Contact WHERE lastname = 'Smith']; What does the query return if there is no Contact with the last name 'Smith'?

  A. A contact initialized to null.
  B. An error that no rows are found.
  C. An empty List of Contacts.
  D. A Contact with empty values.
  B. An error that no rows are found.

• Question 339:

  Which tag should a developer include when styling from external CSS is required in a Visualforce page?

  A. Apex : includeStyle
  B. Apex : require
  C. Apex : includeScript
  D. Apex : stylesheet
  D. Apex : stylesheet

• Question 340:

  Which control statement should a developer use to ensure that a loop body executes at least once?

  A. For(variable : list_or_set){}
  B. While (condition){}
  C. For(init_stmt;exit_cond;increment){}
  D. Do {} while (cond)
  D. Do {} while (cond)