Important Salesforce Plat-Dev-201 Exam Questions

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Salesforce Certified Platform Developer Plat-Dev-201 Exam

Attempt the Salesforce Developer practice test and solve real exam-like Plat-Dev-201 questions to prepare efficiently and increase your chances of success. Our Salesforce Plat-Dev-201 practice questions match the actual Salesforce Certified Platform Developer exam format, helping you enhance confidence and improve performance. With our Plat-Dev-201 practice exam software, you can analyze your performance, identify weak areas, and work on them effectively to boost your final Salesforce Developer exam score.

Vendor:	Salesforce
Exam Name:	Salesforce Certified Platform Developer
Registration Code:	Plat-Dev-201
Related Certification:	Salesforce Developer Certification
Exam Audience:	Salesforce Developer,

Total Questions

204

Last Updated

28-08-2026

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Question: 1

How is a controller and extension specified for a custom object named "Notice" on a Visualforce page?

Aapex:page standardController='Notice_c' extensions='myControllerExtension'''

Bapex:page controllers='Notice_c, myContcollerExtension'

Capex:pege=Notice extends='myControllerExtension''

Dapex:page controller='Notice_c' extensions='myControllerExtension'

Answer: D

Explanation:

In Visualforce, to specify a standard controller for a custom object, the syntax iscontroller='ObjectName__c'.

To add custom functionality, you can use anextensionsattribute to include a controller extension.

Why not other options?

A: The correct syntax iscontroller, notstandardController, for custom objects.

BandC: These are syntactically incorrect.

Visualforce Pages Documentation

Question: 2

A developer is migrating a Visualforce page into a Lightning web component.

The Visualforce page shows information about a single record. The developer decides to use Lightning Data Service to access record data.

Which security consideration should the developer be aware of?

ALightning Data Service ignores field-level security.

BThe with sharing keyword must be used to enforce sharing rules.

CLightning Data Service handles sharing rules and field-level security.

DThe isAccessible () method must be used for field-level access checks.

Answer: C

Explanation:

Why Lightning Data Service?

Enforces Salesforce's security model, including:

Sharing rules.

Field-level security (FLS).

This eliminates the need for additional manual security checks.

Why Not Other Options?

A: Incorrect, LDS enforces FLS.

B:with sharingapplies to Apex, not Lightning Data Service.

D:isAccessible()is unnecessary for LDS because it already enforces FLS.

Question: 3

Universal Containers (UC) wants to lower its shipping cost while making the shipping process more efficient. The Distribution Officer advises UC to implement global addresses to allow multiple Accounts to share a default pickup address. The developer is tasked to create the supporting object and relationship for this business requirement and uses the Setup Menu to create a custom object called "Global Address".

Which field should the developer add to create the most efficient model that supports the business need?

AAdd a master-detail field on the Global Address object to the Account object.

BAdd a lookup field on the Global Address object to the Account object.

CAdd a lookup field on the Account object to the Global Address object.

DAdd a master-detail field on the Account object to the Global Address object.

Answer: C

Explanation:

Why Lookup on Account to Global Address?

An Account can reference a single default Global Address via a lookup field, allowing multiple Accounts to share the same address.

This is more efficient than the reverse (lookup on Global Address to Account), as Global Address is the parent in this relationship.

Avoiding Master-Detail:

Lookup relationships provide flexibility in this use case since Accounts and Global Addresses have independent lifecycles.

Example:Create a custom lookup field on Account referencing the Global Address object.

Question: 4

A lead developer creates a virtual class called "OrderRequest". Consider the following code snippet:

apex

Copy

public class CustomerOrder {

// code implementation

}

How can a developer use the OrderRequest class within the CustomerOrder class?

A. extends (class="OrderRequest")public class CustomerOrder B. public class CustomerOrder implements Order C. public class CustomerOrder extends OrderRequest D. @Implements (class="OrderRequest")public class CustomerOrder

Aextends (class='OrderRequest')public class CustomerOrder
Syntax: This option attempts to use extends followed by (class='OrderRequest') and then public class CustomerOrder.
Analysis: The syntax is incorrect. In Apex, the extends keyword is followed directly by the name of the class to extend, with no parentheses or class= notation. The correct syntax would be public class CustomerOrder extends OrderRequest. The Apex Developer Guide specifies: ''The extends keyword is followed by the name of the parent class, without additional attributes or parentheses'' (Salesforce Apex Developer Guide, Inheritance). The (class='OrderRequest') syntax resembles annotations or markup, but it's not valid in Apex for inheritance.
Conclusion: Incorrect due to invalid syntax.

Bpublic class CustomerOrder implements Order
Syntax: Uses the implements keyword to implement an interface named Order.
Analysis: The implements keyword is used to implement an interface, not to extend a class. The question states that OrderRequest is a virtual class, not an interface, so implements is inappropriate. Additionally, the option references Order, not OrderRequest, which appears to be a mismatch with the class name provided in the question. The Apex Developer Guide clarifies: ''The implements keyword is used for interfaces, while extends is used for classes, including virtual classes'' (Salesforce Apex Developer Guide, Interfaces). Even if Order were intended to be OrderRequest, implements would still be incorrect for a virtual class.
Conclusion: Incorrect, as implements is for interfaces, not virtual classes, and Order does not match OrderRequest.

Cpublic class CustomerOrder extends OrderRequest
Syntax: Declares CustomerOrder as a subclass of OrderRequest using the extends keyword.
Analysis: This is the correct syntax for inheritance in Apex. Since OrderRequest is a virtual class, CustomerOrder can extend it to inherit its methods and properties. The extends keyword allows CustomerOrder to use (inherit) the functionality of OrderRequest. The Apex Developer Guide confirms: ''A class can extend a virtual class using the extends keyword, inheriting its methods and properties'' (Salesforce Apex Developer Guide, Inheritance). This matches the question's intent of ''using'' OrderRequest within CustomerOrder, which typically means inheritance when dealing with a virtual class.
Conclusion: Correct, as it uses the proper extends keyword to inherit from the virtual OrderRequest class.

D@Implements (class='OrderRequest')public class CustomerOrder
Syntax: Uses an @Implements annotation with (class='OrderRequest') before the class declaration.
Analysis: Apex does not have an @Implements annotation. The implements keyword (without @) is used for interfaces, and annotations in Apex (e.g., @AuraEnabled, @TestVisible) do not use this format for inheritance or interface implementation. The Apex Developer Guide does not define @Implements as a valid annotation (Salesforce Apex Developer Guide, Annotations). The correct way to extend a virtual class is with extends, as in option C.
Conclusion: Incorrect due to invalid syntax (@Implements is not a valid Apex annotation).
Why Option C is Correct:
Option C is correct because:
It uses the extends keyword to properly declare CustomerOrder as a subclass of OrderRequest, which is a virtual class.
This allows CustomerOrder to inherit and use the methods and properties defined in OrderRequest, fulfilling the requirement to ''use'' the OrderRequest class within CustomerOrder.
The syntax aligns with Apex best practices for inheritance as outlined in the Salesforce Apex Developer Guide.
Example for Clarity:
Here's how the correct implementation (option C) would look:
apex
Copy
public virtual class OrderRequest {
public String getOrderDetails() {
return 'Order Details';
}
}
public class CustomerOrder extends OrderRequest {
public String getCustomerOrderInfo() {
// Inherit and use OrderRequest's method
String orderDetails = getOrderDetails();
return 'Customer Order: ' + orderDetails;
}
}
CustomerOrder extends OrderRequest, inheriting getOrderDetails().
The developer can use OrderRequest's functionality (e.g., call its methods) within CustomerOrder.
Handling Typos:
The question's code snippet and options are mostly clear, but option B references Order instead of OrderRequest, which appears to be a typo. The analysis assumes the intended class is OrderRequest, as stated in the question stem.
Option D has a typo in the class name: Customerorder should be CustomerOrder (capital O). This does not affect the analysis, as the syntax error (@Implements) is the primary issue.

Answer: C

Explanation:

Comprehensive and Detailed Explanation From Exact Extract: To determine how a developer can use the OrderRequest class within the CustomerOrder class, we need to evaluate the options based on Apex syntax for inheritance, focusing on the fact that OrderRequest is a virtual class. Let's analyze the problem and each option systematically, referencing Salesforce's official Apex Developer Guide.

Understanding Virtual Classes and Inheritance in Apex:

Virtual Class: In Apex, a virtual class allows other classes to extend it and inherit its methods and properties. It can also define methods that can be overridden by subclasses. The Apex Developer Guide states: ''A virtual class can be extended by another class, allowing the subclass to inherit its methods and properties, and override virtual methods if needed'' (Salesforce Apex Developer Guide, Classes).

Inheritance: Apex supports single inheritance using the extends keyword, where a subclass inherits from a single parent class. The Apex Developer Guide notes: ''Use the extends keyword to create a subclass that inherits from a parent class'' (Salesforce Apex Developer Guide, Inheritance).

Virtual vs. Interface:

A virtual class can contain method implementations and is extended using extends.

An interface defines method signatures without implementations and is implemented using implements. The question specifies OrderRequest as a virtual class, not an interface.

Requirement: The CustomerOrder class needs to use OrderRequest, which likely means inheriting its functionality, as OrderRequest is a virtual class.

Evaluating the Options:

Salesforce Apex Developer Guide:

''Classes'' section: Defines virtual classes and their ability to be extended.

''Inheritance'' section: Explains the extends keyword for class inheritance.

''Interfaces'' section: Clarifies the implements keyword for interfaces, distinguishing it from extends.

''Annotations'' section: Confirms that @Implements is not a valid Apex annotation. (Available at: https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/)

Platform Developer I Study Guide:

Section on ''Developer Fundamentals'': Covers Apex object-oriented programming concepts, including inheritance and virtual classes. (Available at: https://trailhead.salesforce.com/en/content/learn/modules/platform-developer-i-certification-study-guide)

Question: 5

A developer is implementing an Apex class for a financial system. Within the class, the variables 'creditAmount' and 'debitAmount' should not be able to change once a value is assigned.

In which two ways can the developer declare the variables to ensure their value can only be assigned one time?

Choose 2 answers

AUse the static keyword and assign its value in a static initializer.

BUse the final keyword and assign its value in the class constructor.

CUse the final keyword and assign its value when declaring the variable.

DUse the static keyword and assign its value in the class constructor.

Answer: B, C

Explanation:

Why Usefinal?

Thefinalkeyword ensures that a variable's value can only be assigned once.

Option B: Assigning the value in the constructor is valid as it allows for flexibility when creating class instances.

Option C: Assigning the value directly when declaring the variable is also valid for constants.