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Salesforce CRT-450 Exam Syllabus Topics:

Section	Weight	Objectives
Logic and Process Automation	46%	- Roll-up summary fields capabilities and use cases - SOQL, SOSL, and DML - Exception handling - Governor limits - Apex triggers - Apex classes and interfaces - Apex variables, constants, and expressions - Apex primitive and complex data types - Declarative process automation features - Formula fields capabilities and use cases - Apex control flow statements
Debug and Deployment Tools	10%	- Debug logs monitoring - Development and deployment environments - Developer Console, Workbench, and Force.com IDE - Metadata and business data deployment
Salesforce Fundamentals	10%	- Multi-tenant environment considerations - AppExchange application extension - Declarative customization use cases - MVC pattern mapping - Core CRM objects capabilities
Data Modeling and Management	12%	- Data import and export - Schema Builder - Custom objects and fields - Relationship types
Testing	12%	- Execute anonymous vs. unit tests - Apex test classes - Test coverage requirements - Test data creation
User Interface	10%	- Visualforce pages - Visualforce controllers - Lightning components

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Salesforce Certified Platform Developer I Sample Questions (Q78-Q83):

NEW QUESTION # 78
What is the value of the Trigger.old context variable in a before insert trigger?

A. An empty list of sObjects
B. null
C. A list of newly created sObjects without IDs
D. Undefined

Answer: B

Explanation:
Trigger.old in a before insert trigger:
The Trigger.old context variable contains the old version of the records being processed in the trigger.
In a before insert trigger, the records being processed are new and have no prior state in the database, so Trigger.old is null.
This behavior is specific to insert triggers because there is no "old" record to reference before the record is created.
Why is it null?
The Trigger.old variable is only populated for triggers that handle updates or deletions (e.g., before update, after update, before delete, after delete). For insert operations, no previous state of the record exists.
Why not the other options?
A . An empty list of sObjects:
This is incorrect because Trigger.old is not initialized as an empty list for insert triggers-it is simply null.
B . Undefined:
Trigger.old is defined in the trigger context, but it is null for insert operations. Undefined is not a valid Apex state.
D . A list of newly created sObjects without IDs:
This describes Trigger.new in a before insert trigger, not Trigger.old. Trigger.new contains the new records being inserted.
Reference:
Apex Triggers Documentation
Trigger Context Variables

NEW QUESTION # 79
A lead developer creates an Apex interface called "Laptop". Consider the following code snippet:

How can a developer use the Laptop Interface within the Silvertaptop class?

A. @Interface (class=''Laptop'')
public class SilverLaptop
B. @Extends(class=Laptop'')
public class SilverLaptop
C. public calss SilverLaptop extends Laptop
D. public class Silverlaptop implements Laptop

Answer: C

NEW QUESTION # 80
What would a developer do to update a picklist field on related Opportunity records when a modification to the associated Account record is detected?

A. Create a Visualforce page.
B. Create a Lightning Component.
C. Create a process with Process Builder.
D. Create a workflow rule with a field update.

Answer: C

NEW QUESTION # 81
A developer needs to make a custom Lightning Web Component available in the Salesforce Classic user interface Which approach can be used to accomplish this?

A. Embed the Lightning Web Component is a Visualforce Component and add directly to the page layout.
B. Use the Lightning Out JavaScript library to embed the Lightning Web Component in a Visualforce page and add to the page layout.
C. Wrap the Lightning Web Component in an Aura Component and surface the Aura Component as a Visualforce tab.
D. Use a Visualforce page with a custom controller to invoke the Lightning Web Component using a call to an Apex method.

Answer: B

Explanation:
The Lightning Out library allows a Lightning Web Component to be embedded in a Visualforce page. This approach is the most suitable to make the LWC accessible in Salesforce Classic.
Reference:Lightning Out Documentation

NEW QUESTION # 82
A custom object Trainer_c has a lookup field to another custom object Gym___c. Which SOQL query will get the record for the Viridian City gym and it's trainers?

A. SELECT Id, (SELECT Id FROM Trainers) FROM Gym_C WHERE Name . Viridian City Gym'
B. SELECT Id, (SELECT Id FROM Trainer_c) FROM Gym_c WHERE Name -Viridian City Gym'
C. SELECT Id, (SELECT Id FROM Trainers) FROM Gym_C WHERE Name -Viridian City Gym'
D. SELECT ID FROM Trainer_c WHERE Gym__r.Name -Viridian City Gym'

Answer: A

NEW QUESTION # 83
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