Salesforce Salesforce Certifications DEX-450 Questions & Answers

• Question 81:

  A developer is creating an application to track engines and their parts. An individual part can be used in different types of engines. What data model should be used to track the data and to prevent orphan records?

  A. Create a junction object to relate many engines to many parts through a master-detail relationship

  B. Create a lookup relationship to represent how each part relates to the parent engine object.

  C. Create a master-detail relationship to represent the one-to-many model of engines to parts.

  D. Create a junction object to relate many engines to many parts through a lookup relationship

  Correct Answer: A

• Question 82:

  A Visual Flow uses an apex Action to provide additional information about multiple Contacts, stored in a custom class, contactInfo. Which is the correct definition of the Apex method that gets additional information?

  A. @InvocableMethod(label='Additional Info') public List getInfo(List contactIds) { /*implementation*/ }

  B. @InvocableMethod(label='additional Info') public static ContactInfo getInfo(Id contactId) { /*implementation*/ }

  C. @invocableMethod(label)='Additional Info') public static List getInfo(List contactIds) { /*Implementation*/ }

  D. @InvocableMethod(Label='additional Info') public ContactInfo(Id contactId) { /*implementation*/ }

  Correct Answer: C

• Question 83:

  Which two statement are acceptable for a developer to use Inside procedural loops?

  A. Contactlist.remove(i)

  B. Delete contactList

  C. Account a=[select id,name from account where id=:con.accountid limit 1]

  D. Contact con =new contact()

  Correct Answer: AD

• Question 84:

  Universal Containers has large number of custom applications that were built using a third-party javaScript framework and exposed using Visualforce pages. The Company wants to update these applications to apply styling that resembles the look and feel of Lightning Experience. What should the developer do to fulfill the business request in the quickest and most effective manner?

  A. Incorporate the Salesforce Lightning Design System CSS stylesheet into the JavaScript applications.

  B. Rewrite all Visualforce pages asLightning components.

  C. Set the attribute enableLightning to treu in the definition.

  D. Enable Available for Lightning Experience, Lightning Comminities, and the mobile app on Visualforce pages used by the custom application.

  Correct Answer: C

• Question 85:

  A developer needs to include a Visualforce page in the detail section of a page layout for the Account object, but does not see the page as an available option in the Page Layout Editor. Which attribute must the developer include in the tag to ensure the Visualforce page can be embedded in a page layout?

  A. Action="AccountId"

  B. StandardController="Account"

  C. Extensions="AccountController"

  D. Controller="Account"

  Correct Answer: B

• Question 86:

  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

  Correct Answer: D

• Question 87:

  What is a valid statement about Apex classes and interfaces? Choose 2 answers:

  A. The default modifier for a class is private.

  B. Exception classes must end with the word exception.

  C. A class can have multiple levels of inner classes.

  D. The default modifier for an interface is private.

  Correct Answer: BD

• Question 88:

  A developer is tasked to perform a security review of the ContactSearch Apex class that exists in the system. Whithin the class, the developer identifies the following method as a security threat: List performSearch(String lastName){ return Database.query('Select Id, FirstName, LastName FROM Contact WHERE LastName Like %'+lastName+'%); } What are two ways the developer can update the method to prevent a SOQL injection attack? Choose 2 answers

  A. Use variable binding and replace the dynamic query with a static SOQL. (Missed)

  B. Use the escapeSingleQuote method to sanitize the parameter before its use. (Missed)

  C. Use a regular expression expression on the parameter to remove special characters.

  D. Use the @Readonly annotation and the with sharing keyword on the class.

  Correct Answer: CD

• Question 89:

  A developer declared a class as follow.

  public class wysiwyg { // Properties and methods including DML }

  Which invocation of a class method will obey the organization-wide defaults and sharing settings for the

  running user in the Salesforce Organization?

  A. An Apex Trigger that invokes a helper method in this class

  B. A Visualforce page with an Apex controller that invokes a method in this class

  C. A user on an external system that has an API call into Salesforce that invokes a method in this class

  D. A developer using the Developer Console that invokes a method in this class from the execute anonymous window

  Correct Answer: D

• Question 90:

  Which aspect of Apex programming is limited due to multitenancy?

  A. The number of active Apex classes

  B. The number of methods in an Apex Class

  C. The number of records processed in a loop

  D. The number of records returned from database queries

  Correct Answer: D