Practice DEX-450 Exam Online

Question 1

An Opportunity needs to have an amount rolled up from a custom object that is not in a master-detail relationship.

How can this be achieved?

A : Write a trigger on the child object and use a red-black tree sorting to sum the amount for all related child objects under the Opportunity.

B : Write a Process Builder that links the custom object to the Opportunity.

C : Write a trigger on the child object and use an aggregate function to sum the amount for all related child objects under the Opportunity

D : Use the Streaming API to create real-time roll-up summaries.

Answer: C

Question 2

what are the three languages used in the visualforce page?

A : Javascript, CSS, HTML

B : Apex, Json, SQL

C : C++, CSS, query

Answer: A

Question 3

A developer must provide custom user interfaces when users edit a Contact in either Salesforce Classic or Lightning Experience.

What should the developer use to override the Contact's Edit button and provide this functionality?

A : A Visualforce page in Salesforce Classic and a Lightning component in Lightning Experience

B : A Lightning component in 5alesforce Classic and a Lightning component in lightning Experience

C : A Visualforce page in Salesforce Classic and a Lightning page in Lightning Experience

D : A Lightning page in Salesforce Classic and a Visualforce page in Lightning Experience

Answer: A

Question 4

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 :

Public class CheckPaymentProcessor implements PaymentProcessor {

public void pay(Decimal amount);

}

C :

Public class CheckPaymentProcessor extends PaymentProcessor {

public void pay(Decimal amount);

}

D :

Public class CheckPaymentProcessor extends PaymentProcessor {

public void pay(Decimal amount) {}

}

Answer: B

Question 5

A developer has an integer variable called maxAttempts. The developer meeds to ensure that once maxAttempts is initialized, it preserves its value for the lenght of the Apex transaction; while being able to share the variable's state between trigger executions. How should the developer declare maxAttempts to meet these requirements?

A : Declare maxattempts as a member variable on the trigger definition.

B : Declare maxattempts as a private static variable on a helper class

C : Declare maxattempts as a constant using the static and final keywords

D : Declare maxattempts as a variable on a helper class

Answer: C

Name:	Programmatic Development using Apex and Visualforce in Lightning Experience (WI24)
Exam Code:	DEX-450
Certification:	Salesforce Platform Developer I
Vendor:	Salesforce
Total Questions:	356
Last Updated:	Apr 22, 2024

Salesforce DEX-450