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Salesforce CRT-450 Exam covers a wide range of topics, including Apex programming language, Visualforce framework, customization of Salesforce applications, and the development of custom user interfaces. CRT-450 exam aims to test the candidate's ability to develop and deploy custom applications on the Salesforce platform, integrate with other systems, and design efficient code that meets business requirements.

Salesforce Certified Platform Developer I Sample Questions (Q190-Q195):

NEW QUESTION # 190
Which statement describes the execution order when triggers are associated to the same object and event?

A. Triggers are executed in the order they are modified.
B. Triggers are executed in the order they are created.
C. Triggers are executed alphabetically by trigger name.
D. Trigger execution order cannot be guaranteed.

Answer: D

Explanation:
When multiple triggers are associated with the same object and event, Salesforce does not guarantee the order in which they will execute.
Option D: Trigger execution order cannot be guaranteed.
Correct Answer.
Salesforce does not provide a mechanism to define or guarantee the execution order of triggers on the same object and event.
If order is important, developers should combine the logic into a single trigger or use trigger frameworks that manage execution order.
Reference:
Apex Triggers
Best Practices for Triggers
Incorrect Options:
Option A: Triggers are executed in the order they are modified.
Incorrect.
Option B: Triggers are executed alphabetically by trigger name.
Incorrect.
Option C: Triggers are executed in the order they are created.
Incorrect.
Conclusion:
The execution order of triggers on the same object and event cannot be guaranteed by Salesforce.

NEW QUESTION # 191
Managers at Universal Containers want to ensure that only decommissioned containers are able to be deleted in the system. To meet the business requirement a Salesforce developer adds "Decommissioned" as a picklist value for the Status _c custom field within the Container _c object.
Which two approaches could a developer use to enforce only Container records with a status of "Decommissioned" can be deleted?
Choose 2 answers

A. Before record-triggered flaw
B. Apex trigger
C. After record-triggered flow
D. Validation rule

Answer: B,C

NEW QUESTION # 192
A developer wrote Apex code that calls out to an external system.
How should a developer write the test to provide test coverage?

A. Write a class that implements the HTTPCalloutMockinterface.
B. Write a class that extends HTTPCalloutMock.
C. Write a class that extends WebserviceMock.
D. Write a class that implements the WebserviceMockinterface.

Answer: A

NEW QUESTION # 193
A developer must create a CreditcardPayment class that provides an implementation of an existing Payment class. Public virtual class Payment { public virtual void makePayment(Decimal amount) { /*implementation*/
} } Which is the correct implementation?

A. Public class CreditCardPayment extends Payment {
public virtual void makePayment(Decimal amount) { /*implementation*/ }
}
B. Public class CreditcardPayment extends Payment {
public override void makePayment(Decimal amount) { /*implementation*/ }
}
C. Public class CreditCardPayment implements Payment {
public virtual void makePayment(Decimal amount) { /*implementation*/ }
}
D. Public class CreditCardPayment implements Payment {
public override void makePayment(Decimal amount) { /*Implementation*/ }
}

Answer: B

Explanation:
To create a CreditcardPayment class that provides an implementation of an existing Payment class, the developer should use the extends keyword to indicate that CreditcardPayment is a subclass of Payment, and the override keyword to indicate that CreditcardPayment provides a different implementation of the makePayment method than the superclass. This way, the CreditcardPayment class inherits the properties and methods of the Payment class, but can also modify or add its own behavior.
The other options are not correct because:
* B. Public class CreditCardPayment implements Payment. This option is not valid, because the implements keyword is used to indicate that a class implements an interface, not another class. An interface is a collection of abstract methods that a class must define, but a class is a blueprint for creating objects that have properties and methods.
* C. Public class CreditCardPayment extends Payment. This option is not valid, because it does not use the override keyword to provide a different implementation of the makePayment method. Without the override keyword, the subclass would inherit the same implementation of the method as the superclass, which defeats the purpose of creating a subclass.
* D. Public class CreditCardPayment implements Payment. This option is not valid, because it has the same problem as option B. It uses the implements keyword instead of the extends keyword, which is incorrect for creating a subclass of another class.
References:
* : Inheritance
* : Interfaces

NEW QUESTION # 194
Which three code lines are required to create a Lightning component on a Visualforce page?
Choose 3 answers.

A. $Lightning.use
B. <apex:slds/>
C. $Lightning.useComponent
D. $Lightning.createComponent
E. <apex:includeLightning/>

Answer: A,D,E

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
To embed a Lightning component in a Visualforce page, you need to:
* Include the Lightning framework using <apex:includeLightning/>.
* Use $Lightning.use to load Lightning components and resources.
* Use $Lightning.createComponent to render the component dynamically in the Visualforce page.
Reference:
Lightning Components for Visualforce Developer Guide

NEW QUESTION # 195
......

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Carl Harris Carl Harris

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