Latest [Jun 13, 2024] Salesforce DEX-450 Real Exam Dumps PDF [Q124-Q148]

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Latest [Jun 13, 2024] Salesforce DEX-450 Real Exam Dumps PDF

DEX-450 Practice Test Questions Updated 239 Questions

The Programmatic Development using Apex and Visualforce in Lightning Experience certification exam has a total of 60 multiple-choice questions that need to be answered within 105 minutes. The passing score is 65%, which means that the candidate needs to answer at least 39 questions correctly. DEX-450 exam fee is $200, and it can be taken either online or in the testing center.

QUESTION 124
A develop created these three roll-up summary fields on the custom object. Project_c:

The developer is asked to create a new field that should the ratio between rejected and approved timesheet for a given project.
What are two benefits of choosing a formula held instead of an Apex trigger to fulfill the request? Choose 2 answers

A test class will validate the formula field during deployment.

A formula field will trigger existing automation when deployed.

A formula field will calculate the retroactively for existing records

Using a formula field reduces maintenance overhead.

QUESTION 125
A developer creates a method in an Apex class and needs to ensure that errors are handled properly.What would the developer use? (There are three correct answers.)

ApexPages.addErrorMessage()

A custom exception

.addError()

Database.handleException()

A try/catch construct

QUESTION 126
A newly hired developer discovers that there are multiple triggers on the case object.
What should the developer consider when working with triggers?

Developers must dictate the order of trigger execution.

Trigger execution order is based on creation date and time.

Unit tests must specify the trigger being tested.

Trigger execution order is not guaranteed for the same sObject.

QUESTION 127
What is an example of a polymorphic lookup field in Salesforce?

The LeadId and Contactid fields on the standard Campaign Member object

A custom field, Link__c, on the standard Contact object that looks up to an Account or a Campaign

The Whatld field on the standard Event object

The Parentid field on the standard Account object

QUESTION 128
Which code in a Visualforce page and/or controller might present a security vulnerability?

<apex:outputField value=”{!ctrl.userInput}” />

<apex:outputText escape=”false” value=” {!$CurrentPage.parameters.userInput}” />

<apex:outputText value=”{!£CurrentPage.parameters.userInput}” />

<apex:outputField escape=”false” value=”{!ctrl.userInput}” />

QUESTION 129
Refer to the following Apex code:

What is the value of x when it is written to the debug log?

QUESTION 130
Which two statements are true about Apex code executed in Anonymous Blocks? Choose 2 answers

Successful DML operations are automatically committed

All DML operations are automatically rolled back

The code runs with the permissions of the user specified in the runAs() statement

The code runs with the permissions of the logged user.

The code runs in system mode having access to all objects and fields.

QUESTION 131
An Apex method, getAccounts, that returns a List of Accounts given a search Term, is available for Lighting Web components to use. What is the correct definition of a Lighting Web component property that uses the getAccounts method?

@AuraEnabled(getAccounts, ‘$searchTerm’)
accountList;

@wire(getAccounts, ‘$searchTerm’)
accountList;

@AuraEnabled(getAccounts, {searchTerm: ‘$searchTerm’})
accountList;

@wire(getAccounts, {searchTerm: ‘$searchTerm’})
accountList;

QUESTION 132
An org has a single account named ‘NoContacts’ that has no related contacts. Given the query:
List<Account> accounts = [Select ID, (Select ID, Name from Contacts) from Account where Name=’NoContacts’]; What is the result of running this Apex?

accounts[0].contacts is invalid Apex.

accounts[0].contacts is an empty Apex.

accounts[0].contacts is Null.

A QueryException is thrown.

QUESTION 133
A developer must write an Apex method that will be called from a Lightning component. The method may delete an Account stored in the accountRec variable.
Which method should a developer use to ensure only users that should be able to delete Accounts can successfully perform deletions?

Schema.sObjectType.Account.isDeletable()

Account.isDeletable()

accountRec.isDeletable()

accountRec.sObjectType.isDeletable()

QUESTION 134
what are the three languages used in the visualforce page?

Javascript, CSS, HTML

Apex, Json, SQL

C++, CSS, query

QUESTION 135
What are three techniques that a developer can use to invoke an anonymous block of code? (Choose three.)

Use the SOAP API to make a call to execute anonymous code.

Create a Visualforce page that uses a controller class that is declared without sharing.

Run code using the Anonymous Apex feature of the Developer’s IDE.

Type code into the Developer Console and execute it directly.

Create and execute a test method that does not specify a runAs() call.

QUESTION 136
A developer created a weather app that contains multiple Lightning web components.
One of the components, called Toggle, has a toggle for Fahrenheit or Celsius units. Another component, called Temperature, displays the current temperature in the unit selected in the Toggle component When a user toggles from Fahrenheit to Celsius or vice versa in the Toggle component, the information must be sent to the Temperature component so the temperature can be converted and displayed.
What is the recommend way to accomplish this?

Create a custom event to handle the communicate between the components.

Use Lightning Message Service to communicate between the component.

Use Lightning Message Service to communicate between the components.

The Toggle component should call a method in the Temperature component.

QUESTION 137
Universal Containers wants to ensure that all new leads created in the system have a valid email address. They have already created a validation rule to enforce this requirement, but want to add an additional layer of validation using automation.
What would be the best solution for this requirement?

Submit a REST API Callojt with a JSON payload and validate the f elds on a third patty system

Use an Approval Process to enforce tne completion of a valid email address using an outbound message action.

Use a before-save Apex trigger on the Lead object to validate the email address and display an error message If it Is invalid

Use a custom Lightning web component to make a callout to validate the fields on a third party system.

QUESTION 138
Which annotation exposes an Apex class as a RESTful web service?

QUESTION 139
A developer is alerted to an issue with a custom Apex trigger that is causing records to be duplicated.
What is the most appropriate debugging approach to troubleshoot the issue?

Disable the trigger m production and test to see If the issue still occurs.

Use the Apex Interactive Debugger to step through the code and Identify the issue.

Review the Historical Event logs to Identify the source of the issue.

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

QUESTION 140
A developer is notified that a text field is being automatically populated with invalid values.however, this should be prevented by a custom validation rule that is in placewhat could be causing this?

The field is being populated by a workflow field update

A DML exception is occuring during the save order of execution

The field is being populated by a before trigger

The user belongs to a permission set that suppresses the validation rule

QUESTION 141
A Lightning component has a wired property, searchResults, that stores a list of Opportunities. Which definition of the Apex method, to which the searchResults property is wired, should be used?

@AuraEnabled(cacheable=true)
public static List<Opportunity> search(String term) { /* implementation*/ }

@AuraEnabled(cacheable=true)
public List<Opportunity> search(String term) { /*implementation*/ }

@AuraEnabled(cacheable=false)
public static List<Opportunity> search(String term) { /*implementation*/ }

@AuraEnabled(cacheable=false)
public List<Opportunity> search(String term) { /*implementation*/ }

QUESTION 142
Which declarative method helps ensure quality data? (Choose 3)

Validation Rules

Workflow alerts

Exception Handling

Lookup Filters

Page Layouts

QUESTION 143
Universal Containers implemented a private sharing model for the Account object. A custom Account search tool was developed with Apex to help sales representatives find accounts that match multiple criteria they specify. Since its release, users of the tool report they can see Accounts they do not own. What should the developer use to enforce sharing permission for the currently logged-in user while using the custom search tool?

Use the schema describe calls to determine if the logged-in users has access to the Account object.

Use the without sharing keyword on the class declaration.

Use the UserInfo Apex class to filter all SOQL queries to returned records owned by the logged-in user.

Use the with sharing keyword on the class declaration.

QUESTION 144
A Salesforce developer wants to review their code changes immediately and does not want to install anything on their computer or on the org.
Which tool is best suited?

Developer Console

Salesforce Extension for VSCode

Setup Menu

Third-party apps from App Exchange

QUESTION 145
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?

Apex trigger

Before record-triggered flow

Validation rule

After record-triggered flow

QUESTION 146
What are three characteristics of change set deployments?
Choose 3 answers

Change sets can only be used between related organizations.

Change sets can be used to transfer records.

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

Change sets can deploy custom settings data.

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

QUESTION 147
A developer needs to join data received from an integration with an external system with parent records in Salesforce. The data set does not contain the Salesforce IDs of the parent records, but it does have a foreign key attribute that can be used to identify the parent.
Which action will allow the developer to relate records in the data model without knowing the Salesforce ID?

Create a custom field on the child object of type Foreign Key

Create and populate a custom field on the parent object marked as Unique

Create and populate a custom field on the parent object marked as an External ID.

Create a custom field on the child object of type External Relationship.

QUESTION 148
The following Apex method is part of the ContactService class that is called from a trigger: public static void setBusinessUnitToEMEA(Contact thisContact){ thisContact.Business_Unit__c = “EMEA” ; update thisContact; } How should the developer modify the code to ensure best practice are met?

Public static void setBusinessUnitToEMEA(List<Contact> contacts){
for(Contact thisContact : contacts){
thisContact.Business_Unit__c = ‘EMEA’ ;
update contacts[0];
}
}

Public static void setBusinessUnitToEMEA(List<Contact> contacts){
for(Contact thisContact : contacts) {
thisContact.Business_Unit__c = ‘EMEA’ ;
}
update contacts;
}

Public static void setBusinessUnitToEMEA(Contact thisContact){
List<Contact> contacts = new List<Contact>();
contacts.add(thisContact.Business_Unit__c = ‘EMEA’);
update contacts;
}

Public void setBusinessUnitToEMEA(List<Contact> contatcs){
contacts[0].Business_Unit__c = ‘EMEA’ ;
update contacts[0];
}

Salesforce DEX-450 exam covers a range of topics, including Apex, Visualforce, Lightning components, integration, data modeling, and security. It is a challenging exam that tests the understanding of Salesforce development best practices, coding standards, and design patterns. Passing DEX-450 exam requires a deep understanding of the Salesforce platform, as well as the ability to apply that knowledge to solve real-world problems. Candidates who pass the Salesforce DEX-450 exam will be recognized as experts in programmatic development using Apex and Visualforce in Lightning Experience, setting them apart from other Salesforce developers.

Salesforce DEX-450 Dumps – Secret To Pass in First Attempt: https://www.actualpdf.com/DEX-450_exam-dumps.html

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