Salesforce DEX-450 Online Practice Questions and Exam Preparation

Salesforce DEX-450 Online Questions & Answers

• Question 261:

  A developer creates an Apex helper class to handle complex trigger logic. How can the helper class warn users when the trigger exceeds DML governor limits?

  A. By using PageReference.setRedirect() to redirect the user to a custom Visualforce page before the number of DML statements is exceeded.
  B. By using Messaging.sendEmail() to continue toe transaction and send an alert to the user after the number of DML statements is exceeded.
  C. By using AmexMessage.Messages() to display an error message after the number of DML statements is exceeded.
  D. By using Limits.getDMLRows() and then displaying an error message before the number of DML statements is exceeded.
  D. By using Limits.getDMLRows() and then displaying an error message before the number of DML statements is exceeded.

• Question 262:

  A developer needs to create a custom visualforce button for the opportunity object page layout that will cause a web service to be called and redirect the user to a new page when clicked. Which three attributes need to be defined in the tag of the visualforce page to enable this functionality?

  A. Standardcontroller
  B. Extensions
  C. Action
  D. Controller
  A. Standardcontroller
  B. Extensions
  C. Action

• Question 263:

  The Sales Management team hires a new intern. The intern is not allowed to view Opportunities, but needs to see the Most Recent Closed Date of all child Opportunities when viewing an Account record. What would a developer do to meet this requirement?

  A. Create a trigger on the Account object that queries the Close Date of the most recent Opportunities.
  B. Create a Workflow rule on the Opportunity object that updates a field on the parent Account.
  C. Create a formula field on the Account object that performs a MAX on the Opportunity Close Date field.
  D. Create a roll-up summary field on the Account object that performs a MAX on the Opportunity Close Date field.
  D. Create a roll-up summary field on the Account object that performs a MAX on the Opportunity Close Date field.

• Question 264:

  The initial value for a number field on a record is 1. A user updated the value of the number field to 10. This action invokes a workflow field update, which changes the value of the number field to 11. After the workflow field update, an update trigger fires.What is the value of the number field of the object that is obtained from Trigger.old?

  A. Null
  B. 11
  C. 1
  D. 10
  C. 1

• Question 265:

  Which type of code represents the Controller in MVC architecture on the Force.com platform? (Choose 2)

  A. JavaScript that is used to make a menu item display itself.
  B. A static resource that contains CSS and images.
  C. Custom Apex and JavaScript coda that is used to manipulate data.
  D. StandardController system methods that are referenced by Visualforce.
  C. Custom Apex and JavaScript coda that is used to manipulate data.
  D. StandardController system methods that are referenced by Visualforce.

• Question 266:

  A developer needs to create a baseline set of data (Accounts, Contacts, Products, Assets) for an entire suite of tests allowing them to test independent requirements various types of Salesforce Cases. Which approach can efficiently generate the required data for each unit test?

  A. Add @IsTest(seeAllData=true) at the start of the unit test class
  B. Create test data before test.startTest() in the test unit.
  C. Use @TestSetup with a void method
  D. Create a mock using Stub API
  C. Use @TestSetup with a void method

• Question 267:

  In a single record, a user selects multiple values from a multi-select picklist. How are the selected values represented in Apex?

  A. As a String with each value separated by a comma
  B. As a Set with each value as an element in the set
  C. As a String with each value separated by a semicolon
  D. As a List with each value as an element in the list Previous
  C. As a String with each value separated by a semicolon

• Question 268:

  Which two conditions cause workflow rules to fire? Choose 2 answers

  A. Changing the territory assignments of accounts and opportunities
  B. Updating records using the bulk API
  C. Converting leads to person accounts
  D. An Apex Batch process that changes field values
  B. Updating records using the bulk API
  D. An Apex Batch process that changes field values

• Question 269:

  What is a correct pattern to follow when programming in Apex on a Multi-tenant platform?

  A. Apex code is created in a separate environment from schema to reduce deployment errors.
  B. DML is performed on one record at a time to avoid possible data concurrency issues.
  C. Queries select the fewest fields and records possible to avoid exceeding governor limits.
  D. Apex classes use the ''with sharing" keyword to prevent access from other server tenants.
  C. Queries select the fewest fields and records possible to avoid exceeding governor limits.

• Question 270:

  What is the debug output of the following Apex code?

  Decimal theValue;

  System.debug (theValue);

  A. 0.0
  B. null
  C. Undefined
  B. null