Salesforce DEX-450 Online Practice Questions and Exam Preparation

Salesforce DEX-450 Online Questions & Answers

• Question 221:

  A developer writes a SOQL query to find child records for a specific parent. How many levels can be returned in a single query?

  A. 1
  B. 7
  C. 5
  D. 3
  C. 5

• Question 222:

  A developer created a Visualforce page with a custom controller to show a list of accounts. The page uses the component, with a variable called "selection", to show the valid values for Account.Type. The page uses an component to display the list of accounts, where the iteration variable is "acct". The developer wants to ensure that when a user selects a type on the component, only accounts with that type are shown on the page. What should the developer do to accomplish this?

  A. Use the onChange event to update the list of accounts in the controller when the value changes, and then re-render the pageBlockTable.
  B. Create multiple lists in the controller that represent the relevant accounts for each account type when the page loads, then reference the correct one dynamically on the pageBlockTable.
  C. Add the Rendered={!Acct.type==selection} attribute to the pageBlockTable component
  D. Create a component for each option and use a variable with hide parameter on the element.
  A. Use the onChange event to update the list of accounts in the controller when the value changes, and then re-render the pageBlockTable.

• Question 223:

  Which code in a Visualforce page and/or controller might present a security vulnerability?

  B

• Question 224:

  Using the Schema Builder, a developer tries to change the API name of a field that is referenced in an Apex test class. What is the end result?

  A. The API name is not changed and there are no other impacts.
  B. The API name of the field and the reference in the test class is changed.
  C. The API name of the field is changed, and a warning is issued to update the class.
  D. The API name of the field and the reference in the test class is updated.
  C. The API name of the field is changed, and a warning is issued to update the class.

• Question 225:

  Which collection type provides unique key/value pairings of data?

  A. Map
  B. List
  C. Array
  D. Set
  A. Map

• Question 226:

  A candidate may apply to multiple jobs at the company Universal Containers by submitting a single application per job posting, that application cannot be modified to be resubmitted to a different job posting.What can the administrator do to associate an application with each job posting in the schema for the organization?

  A. Create a lookup relationship on both objects to a junction object called Job Posting Applications.
  B. Create a master-detail relationship in the Job Postings custom object to the Applications custom object.
  C. Create a master-detail relationship in the Application custom object to the Job Postings custom object.
  D. Create a lookup relationship in the Applications custom object to the Job Postings custom object.
  C. Create a master-detail relationship in the Application custom object to the Job Postings custom object.

• Question 227:

  When creating unit tests in Apex, which statement is accurate?Choose 2

  A. Unit tests with multiple methods result in all methods failing every time one method fails.
  B. Increased test coverage requires large test classes with many lines of code in one method.
  C. Triggers do not require any unit tests in order to deploy them from sandbox to production.
  D. System Assert statements that do not Increase code coverage contribute important feedback in unit tests
  B. Increased test coverage requires large test classes with many lines of code in one method.
  D. System Assert statements that do not Increase code coverage contribute important feedback in unit tests

• Question 228:

  What is the maximum number of SOQL queries used by the following code? List aList = [SELECT Id FROM Account LIMIT 5]; for (Account a : aList){ List cList = [SELECT Id FROM Contact WHERE AccountId = :a.Id); }

  A. 5
  B. 6
  C. 1
  D. 2
  B. 6

• Question 229:

  A developer writes the following code:

  

  What is the result of the debug statement?

  A. 1, 100
  B. 1, 150
  C. 2, 150
  D. 2, 200
  C. 2, 150

• Question 230:

  A developer creates a new Apex trigger with a helper class, and writes a test class that only exercises 95% coverage of new Apex helper class. Change Set deployment to production fails with the test coverage warning: "Test coverage of selected Apex Trigger is 0%, at least 1% test coverage is required" What should the developer do to successfully deploy the new Apex trigger and helper class?

  A. Create a test class and methods to cover the Apex trigger
  B. Run the tests using the 'Run All Tests' method.
  C. Remove the falling test methods from the test class.
  D. Increase the test class coverage on the helper class
  A. Create a test class and methods to cover the Apex trigger