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DEX-450: Build Applications Programmatically on the Salesforce Platform Dumps

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Question No: 1

MultipleChoice

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

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

Options

AExtends (class='OrderRequest'}
public class CustomerOrder

Bpublic class CustomerOrder implements Order

Cpublic class CustomerOrder extends OrderRequest

D@Implements (class='OrderRequest')
public class Customerorder

Answer
C

Question No: 2

MultipleChoice

Which two are best practices when it comes to Aura component and application event handling?

Select 2 answers

Options

ATry to use application events as opposed to component events.

BReuse the event logic in a component bundle, by putting the logic in the helper.

CUse component events to communicate actions that should be handled at the application level.

DHandle low-level events in the event handler and re-fire them as higher-level events.

Answer
B, D

Question No: 3

MultipleChoice

Which two settings must be defined In order to update a record of a junction object?

Select 2 answers

Options

ARead/Write access on the secondary relationship

BRead/Write access on the primary relationship

CRead/Write access on the junction object

DRead access on the primary relationship

Answer
A, B

Question No: 4

MultipleChoice

A team of many developers work in their own individual orgs that have the same configuration as the production org.

Which type of org is best suited for this scenario?

Options

ADeveloper Sandbox

BFull Sandbox

CDeveloper Edition

DPartner Developer Edition

Answer
B

Question No: 5

MultipleChoice

If Apex code executes inside the execute() method of an Apex class when implementing the Batchable interface, which two statements are true regarding governor limits?

Select 2 answers

Options

AThe Apex governor limits are reset for each iteration of the execute () method.

BThe Apex governor limits cannot be exceeded due to the asynchronaus nature of the transaction.

CThe Apex governor limits will use the asynchronous limit levels.

DThe Apex governor limits are omitted while calling the constructor of the Apex class.

Answer
A, B

Question No: 6

MultipleChoice

Universal Containers is developing a new Lightning web component for their marketing department. They want to ensure that the component is fine-tuned and provides a seamless user experience.

What are some benefits of using the Lightning Component framework?

Options

ABetter performance due to client-side rendering

BAutomatic support for accessibility standards

CCompatibility with all web browsers

DEasy integration with third-party libraries

Answer
A

Question No: 7

MultipleChoice

A developer is alerted to an issue with a custom Apex trigger that is causing records to be duplicated.

What is the best debugging approach to troubleshoot the issue?

Options

AReview the Historical Event logs to identify the source of the issue.

BAdd system.debug statements to the code to track the execution flow and identify the issue.

CUse the Apex Interactive Debugger to step through the code and identify the issue.

DDisable the trigger in production and test to see if the issue still occurs.

Answer
B

Question No: 8

MultipleChoice

A developer creates a custom exception as shown below:

public class ParityException extends Exception. {}

What are two ways the developer can fire the exception in Apex? Choose 2 answers

Options

Athrow new ParityException() ;

Bnew parityException. ('parity does not match');

Cthrow new ParityException ('parity docs not match');

Dnew ParityExcaption () ;

Answer
A, CExplanation

To fire an exception in Apex, the developer must use the throw statement along with an instance of the exception.

Option A: throw new ParityException();

Correct Way.

Creates a new instance of ParityException with no message and throws it.

Syntax is correct for throwing an exception.

Option C: throw new ParityException('parity does not match');

Correct Way.

Creates a new instance of ParityException with a custom message and throws it.

The exception class inherits from Exception, which allows passing a message to the constructor.

Options Not Correct:

Option B: new ParityException('parity does not match');

Incorrect.

This statement creates a new instance of ParityException but does not throw it.

Without the throw keyword, the exception is not fired.

Option D: new ParityException();

Incorrect.

Similar to Option B, this creates a new instance but does not throw it.

The exception will not affect the flow unless it is thrown.

Conclusion:

The two ways the developer can fire the exception are:

Option A: throw new ParityException();

Option C: throw new ParityException('parity does not match');

Both use the throw statement to fire the exception.

Question No: 9

MultipleChoice

What are three characteristics of change set deployments?

Choose 3 answers

Options

AChange sets can deploy custom settings data.

BChange sets can be used to transfer records.

CDeployment is done in a one-way, single transaction.

DSending a change set between two orgs requires a deployment connection.

EChange sets can only be used between related organization

Answer
C, D, EExplanation

Change Sets are a point-and-click tool for migrating metadata between related Salesforce orgs, such as from a sandbox to a production org.

Option C: Deployment is done in a one-way, single transaction.

Correct.

Change sets are deployed in a one-way direction from the source org to the destination org.

The deployment occurs in a single transaction. If any component fails to deploy, the entire deployment is rolled back.

Before deploying a change set, you must set up a deployment connection between the source and destination orgs.

This connection is established through the Setup menu under Deployment Connections.

Change sets can only be sent between orgs that are affiliated, such as a sandbox and its production org, or sandboxes that are clones of the same production org.

They cannot be used between unrelated orgs.

Change sets can deploy the metadata of custom settings (the definition), but not the actual data stored within them.

To move custom settings data, you must use a data migration tool like Data Loader.

Change sets are designed to transfer metadata components, not data records.

To transfer data records, use tools like Data Loader or Data Import Wizard.

Deploy Change Sets

Option D: Sending a change set between two orgs requires a deployment connection.

Correct.

Create Deployment Connections

Option E: Change sets can only be used between related organizations.

Correct.

Change Sets Overview

Incorrect Options:

Option A: Change sets can deploy custom settings data.

Incorrect.

Change Set Considerations

Option B: Change sets can be used to transfer records.

Incorrect.

Deploy Metadata with Change Sets

Conclusion:

The three characteristics of change set deployments are C, D, and E.

Question No: 10

MultipleChoice

The Job_application_ c custom object has a field that is a master-detail relationship to the Contact object, where the Contact object is the master.

As part of a feature implementation, a developer needs to retrieve a list containing all Contact records where the related Account Industry is 'Technology', while also retrieving the Contact's Job_Application__c records.

Based on the object's relationships, what is the most efficient statement to retrieve the list of Contacts?

Options

AOption A

BOption B

COption C

DOption D

Answer
D

Question No: 11

MultipleChoice

Flow Builder uses an Apex action to provide additional information about multiple Contacts, stored in a custom class, Con

Which is the correct definition of the Apex method that gets the additional information?

Options

AOption A

BOption

COption

DOption

Answer
A

Question No: 12

MultipleChoice

A software company uses the following objects and relationships:

* Case: to handle customer support issues

* Defect__c: a custom object to represent known issues with the company's software

* Case_Defect__c: a junction object between Case and Defect__c to represent that a defect is a cause of a customer issue

Case and Defect__c have Private organization-wide defaults.

What should be done to share a specific Case_Defect__c record with a user?

Options

Ashare the parent Defect__c record.

BShare the parent Case record.

CShare the parent Case and Defect_c records.

DShare the Case_Defect_c record.

Answer
CExplanation

Since Case and Defect__c have Private organization-wide defaults (OWD), users need explicit access to the parent records to access the child records in a master-detail or junction object relationship.

The Case_Defect__c is a junction object between Case and Defect__c.

Option C: Share the parent Case and Defect__c records.

Correct Answer.

To access a record on a junction object (Case_Defect__c), a user must have access to both parent records.

Sharing both the Case and Defect__c records with the user will grant them access to the Case_Defect__c record.

Sharing only the Defect__c record is not enough; access to the Case is also required.

Option B: Share the parent Case record.

Insufficient.

Option D: Share the Case_Defect__c record.

*Not Possible Directly.

Sharing rules cannot be applied directly to junction object records in a master-detail relationship.

Access is controlled through the parent records.

Conclusion:

To share a specific Case_Defect__c record with a user, you need to share both the parent Case and Defect__c records, which is Option C.

Sharing Considerations for Junction Objects

Sharing Behavior

Incorrect Options:

Option A: Share the parent Defect__c record.

Insufficient.

Question No: 13

MultipleChoice

A developer creates a Lightning web component that imports a method within an Apex class. When a Validate button is pressed, the method runs to execute complex validations.

In this implementation scenario, which two options are part of the Controller according to the MVC architecture?

Choose 2 answers

Options

AHTML file

BXML file

CApex class

DJavaScript file

Answer
C, DExplanation

In the Model-View-Controller (MVC) architecture applied to a Lightning Web Component (LWC) that imports an Apex method:

Controller refers to the logic that handles input and interactions.

In this scenario, when a button is pressed, the method runs to execute complex validations.

Option C: Apex class

Part of Controller.

The Apex class contains the method that performs the complex validations.

It acts as the server-side controller logic.

The JavaScript file of the LWC handles the client-side logic.

It invokes the Apex method when the button is pressed.

The HTML file defines the component's template (View), not the Controller.

Option B: XML file

Configuration File.

The XML file (configuration file) defines metadata about the component, such as where it's available, but it's not part of the Controller.

Conclusion:

The Controller parts in this scenario are the Apex class and the JavaScript file, which are Options C and D.

Calling Apex Methods

Option D: JavaScript file

Part of Controller.

JavaScript Controller in LWC

Incorrect Options:

Option A: HTML file

View Layer.

Question No: 14

MultipleChoice

The Job_Application__c custom object has a field that is a Master-Detail relationship to the Contact object, where the Contact object is the Master. As part of a feature implementation, a developer needs to retrieve a list containing all Contact records where the related Account Industry is 'Technology' while also retrieving the contact's Job_Application__c records.

Based on the object's relationships, what is the most efficient statement to retrieve the list of contacts?

Options

A[SELECT Id, (SELECT Id FROM Job_Applications_r) FROM Contact WHERE
Account.Industry = 'Technology'];

B[SELECT Id, (SELECT Id FROM Job_Applications_r) FROM Contact WHERE
Accounts.Industry = 'Technology'];

C[SELECT Id, (SELECT Id FROM Job_Applications_c) FROM Contact WHERE
Accounts.Industry = 'Technology'];

D[SELECT Id, (SELECT Id FROM Job_Application_c) FROM Contact WHERE
Account.Industry = 'Technology'];

Answer
B

Question No: 15

MultipleChoice

A Visual Flow uses an apex Action to provide additional information about multiple Contacts, stored in a custom class, contactInfo. Which is the correct definition of the Apex method that gets additional information?

Options

A@InvocableMethod(label='Additional Info')
public List<ContactInfo> getInfo(List<Id> contactIds)
{ /*implementation*/ }

B@InvocableMethod(label='additional Info')
public static ContactInfo getInfo(Id contactId)
{ /*implementation*/ }

C@invocableMethod(label)='Additional Info')
public static List<ContactInfo> getInfo(List<Id> contactIds)
{ /*Implementation*/ }

D@InvocableMethod(Label='additional Info')
public ContactInfo(Id contactId)
{ /*implementation*/ }

Answer
C

Question No: 16

MultipleChoice

A developer uses a loop to check each Contact in a list. When a Contact with the Title of

''Boss'' is found, the Apex method should jump to the first line of code outside of the for

loop.

Which Apex solution will let the developer implement this requirement?

Options

Abreak;

BContinue

CNext

DExit

Answer
A

Question No: 17

MultipleChoice

Universal Containers has an order system that uses an Order Number to identify an order for customers and service agents. Order will be imported into Salesforce.

Options

ALookup

BDirect Lookup

CNumber with External ID

DIndirect Lookup

Answer
C

Question No: 18

MultipleChoice

Universal Hiring is using Salesforce to capture job applications. A salesforce administrator created two custom objects; Job c acting as the master object, Job application.__: acting as the detail.

What is the recommended tool a developer should use to meet the business requirement?

Options

ARecord-triggered flow

BProcess Builder

CFormula field

DApex trigger

Answer
C

Question No: 19

MultipleChoice

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__: custom field within the Contact__c object.

Which tool should the developer use to enforce only Container records with a status of 'Decommissioned' can be deleted?

Options

AApex trigger

BBefore record-triggered flow

CValidation rule

DAfter record-triggered flow

Answer
A

Question No: 20

MultipleChoice

What are two best practices when it comes to Lightning Web Component events?

Options

AUse event.target to communicate data to elements that aren't in the same shadow tree.

BUse events configured with bubbles: false and composed:false.

CUse CustomEvent to pass data from a child to a parent component.

DUse event.detail to communicate data to elements in the same shadow tree

Answer
A, C

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