Salesforce DEX-450 Online Practice Questions and Exam Preparation

Salesforce DEX-450 Online Questions & Answers

• Question 401:

  A developer must implement a CheckPaymentProcessor class that provides check processing payment capabilities that adhere to what defined for payments in the PaymentProcessor interface. public interface PaymentProcessor { void pay (Decimal amount); }

  Which is the correct implementation to use the PaymentProcessor interface class?

  A. Public class CheckPaymentProcessor implements PaymentProcessor { public void pay(Decimal amount) {}
  B. }
  C. Public class CheckPaymentProcessor implements PaymentProcessor { public void pay(Decimal amount); }
  D. Public class CheckPaymentProcessor extends PaymentProcessor { public void pay(Decimal amount); }
  E. Public class CheckPaymentProcessor extends PaymentProcessor { public void pay(Decimal amount) {} }
  A. Public class CheckPaymentProcessor implements PaymentProcessor { public void pay(Decimal amount) {}

• Question 402:

  What is the result of the following code block ? Integer x = 1;Integer Y = 0;While(x < 10){Y++;}

  A. An error occurs
  B. Y = 9
  C. Y = 10
  D. X = 0
  A. An error occurs

• Question 403:

  A development team wants to use a deployment script to automatically deploy to a sandbox during their development cycles. Which tool should they use to deploy to the sandbox?

  A. Change Sets
  B. VSCode
  C. Ant Migration Tool
  D. Developer Console
  C. Ant Migration Tool

• Question 404:

  Which three code lines are required to create a Lightning component on a Visualforce page? Choose 3 answers

  A. $Lightning.createComponent
  C. $Lightning.useComponent
  D. $Lightning.use (Missed)
  A. $Lightning.createComponent
  D. $Lightning.use (Missed)

• Question 405:

  A developer has the controller class below.

  

  Which code block will run successfully in an execute anonymous window?

  A. myFooController m = new myFooController();System.assert(m.prop !=null);
  B. myFooController m = new myFooController();System.assert(m.prop ==0);
  C. myFooController m = new myFooController();System.assert(m.prop ==null);
  D. myFooController m = new myFooController();System.assert(m.prop ==1);
  C. myFooController m = new myFooController();System.assert(m.prop ==null);

• Question 406:

  A developer is creating an enhancement to an application that will allow people to be related to their employer. Which date model should be used to track the data?

  A. Create a junction object to relate many people to many employers trough master-detail relationship
  B. Create a junction object to relate many people to many employers trough lookup relationship
  C. Create a lookup relationship to indicate that a person has an employer
  D. Create a master detail relationship to indicate that a person has an employer
  C. Create a lookup relationship to indicate that a person has an employer

• Question 407:

  What are two valid options for iterating through each Account in the collection List named AccountList? (Choose two.)

  A. for (Account theAccount : AccountList) {...}
  B. for(AccountList) {...}
  C. for (List L : AccountList) {...}
  D. for (Integer i=0; i < AccountList.Size(); i++) {...}
  A. for (Account theAccount : AccountList) {...}
  D. for (Integer i=0; i < AccountList.Size(); i++) {...}

• Question 408:

  In which two org types can a developer create new Apex Classes? Choose 2 answers

  A. Developer Edition
  B. Sandbox
  C. Enterprise Edition
  D. Unlimited
  A. Developer Edition
  B. Sandbox

• Question 409:

  If apex code executes inside the execute() method of an Apex class when implementing the Batchable interface, which statement are true regarding governor limits? Choose 2 answers

  A. The Apex governor limits might be higher due to the asynchronous nature of the transaction. (Missed)
  B. The apex governor limits are reset for each iteration of the execute() mrthod. (Missed)
  C. The Apex governor limits are relaxed while calling the costructor of the Apex class.
  D. The Apex governor limits cannot be exceeded due to the asynchronous nature of the transaction,
  A. The Apex governor limits might be higher due to the asynchronous nature of the transaction. (Missed)
  B. The apex governor limits are reset for each iteration of the execute() mrthod. (Missed)

• Question 410:

  A developer has a Visualforce page and custom controller to save Account records. The developer wants to display any validation rule violation to the user. How can the developer make sure that validation rule violations are displayed?

  A. Add cuatom controller attributes to display the message.
  B. Include on the Visualforce page.
  C. Use a try/catch with a custom exception class.
  D. Perform the DML using the Database.upsert() method.
  B. Include on the Visualforce page.