DEX-450 Exam Dumps, DEX-450 Practice Test Questions [Q99-Q121]

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DEX-450 Exam Dumps, DEX-450 Practice Test Questions

PDF (New 2023) Actual Salesforce DEX-450 Exam Questions

Salesforce DEX-450 certification exam is a programmatic development certification that focuses on Apex and Visualforce development within the Lightning Experience platform. Programmatic Development using Apex and Visualforce in Lightning Experience certification is designed for developers who are interested in building custom applications, integrations, and business logic solutions within Salesforce. DEX-450 exam covers a wide range of topics including Apex syntax and data types, Visualforce page development, Lightning component development, and Salesforce security models.

NO.99 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];
}

NO.100 A developer needs to save a List of existing Account records named myAccounts to the database, but the records do not contain Salesforce Id values. Only the value of a custom text field configured as an External ID with an API name of Foreign_Key__c is known.
Which two statements enable the developer to save the records to the database without an Id? (Choose two.)

Upsert myAccounts Foreign_Key__c;

Upsert myAccounts(Foreign_Key__c);

Database.upsert (myAccounts, Foreign_Key__c);

Database.upsert(myAccounts).Foreign_Key__c;

NO.101 Given the following trigger implementation:
trigger leadTrigger on Lead (before update){
final ID BUSINESS_RECORDTYPEID = ‘012500000009Qad’;
for(Lead thisLead : Trigger.new){
if(thisLead.Company != null && thisLead.RecordTypeId != BUSINESS_RECORDTYPEID){ thisLead.RecordTypeId = BUSINESS_RECORDTYPEID;
}
}
}
The developer receives deployment errors every time a deployment is attempted from Sandbox to Production.
What should the developer do to ensure a successful deployment?

Ensure BUSINESS_RECORDTYPEID is retrieved using Schema.Describe calls.

Ensure a record type with an ID of BUSINESS_RECORDTYPEID exists on Production prior to deployment.

Ensure BUSINESS_RECORDTYPEID is pushed as part of the deployment components.

Ensure the deployment is validated by a System Admin user on Production.

NO.102 developer created this Apex trigger that calls MyClass .myStaticMethod: trigger myTrigger on Contact(before insert) ( MyClass.myStaticMethod(trigger.new, trigger.oldMap); } The developer creates a test class with a test method that calls MyClass.mystaticMethod, resulting in 81% overall code coverage. What happens when the developer tries to deploy the trigger and two classes to production, assuming no other code exist?

The deployment fails because the Apex trigger has no code coverage.

The deployment fails because no assertions were made in the test method.

The deployment passes because the Apex code has required (>75%) code coverage.

The deployment passes because both classes and the trigger were included in the deployment.

NO.103 A developer creates a custom controller and a custom Visualforce page by using the code block below:
public class MyController {
public String myString {
get {
if (myString == null) { myString = ‘a’;
}
return myString;
} private set; } public string getMyString (){
return ‘getMyString’;
} public string getStringMethod () {
if (myString == null) {
myString = ‘b’;
} return myString;
}
} <apex:page controller = “MyController”> {!StringMethod}, {!myString}, {!myString} </apex:page> What can the user expect to see when accessing the custom page?

A, a, a

B, b, b

A, b, getMyString

B, a, getMyString

NO.104 A developer needs to implement a custom SOAP Web Service that is used by an external Web Application. The developer chooses to Include helper methods that are not used by the Web Application In the Implementation of the Web Service Class.
Which code segment shows the correct declaration of the class and methods?
A)

B)

C)

D)

Option A

Option B

Option C

Option D

NO.105 What is a benefit of using an after insert trigger over using a before insert trigger?

An after insert trigger allows a developer to bypass validation rules when updating fields on the new record.

An after insert trigger allows a developer to insert other objects that reference the new record.

An after insert trigger allows a developer to make a callout to an external service.

An after insert trigger allows a developer to modify fields in the new record without a query.

NO.106 In a single record, a user selects multiple values from a multi-select picklist.
How are the selected values represented in Apex?

As a List<String> with each value as an element in the list

As a String with each value separated by a comma

As a String with each value separated by a semicolon

As a Set<String> with each value as an element in the set

NO.107 Refer to the code snippet below:

When a Lightning web component is rendered, a list of apportunities that match certain criteria shopuld be retrievved from the database and displayed to the end user.

Choose 3 answer

The method must specify the (cacheable-trun) attribute

The method must specify the (continuation-true) attribute

The method must be annotaled with true Invocablemethod annolation

The method cannot mutate the result set retrieved from the database.

The method must be annotated with the AureEnabled annolation

NO.108 A developer uses a test setup method to create an account named ‘test’. The first method deletes the account record. What must be done in the second test method to use the account?

Use select id from account where name=’test’

Restore the account using an undelete statement

Call the test setup method at the start of the test

The account cannot be used in the second method

NO.109 custom picklist field, Food_Preference__c, exist on a custom object. The picklist contains the following options: ‘Vegan’,’Kosher’,’No Preference’. The developer must ensure a value is populated every time a record is created or updated. What is the most efficient way to ensure a value is selected every time a record is saved?

Set “Use the first value in the list as the default value” as True.

Set a validation rule to enforce a value is selected.

Mark the field as Required on the field definition.

Mark the field as Required on the object’s page layout.

NO.110 A custom picklist field, Food_Preference__c, exist on a custom object. The picklist contains the following options: ‘Vegan’,’Kosher’,’No Preference’. The developer must ensure a value is populated every time a record is created or updated. What is the most efficient way to ensure a value is selected every time a record is saved?

Set “Use the first value in the list as the default value” as True.

Set a validation rule to enforce a value is selected.

Mark the field as Required on the field definition.

Mark the field as Required on the object’s page layout.

NO.111 A developer executes the following query in Apex to retrieve a list of contacts for each account:
List<account> accounts = [Select ID, Name, (Select ID, Name from Contacts) from Account] ; Which two exceptions may occur when it executes? (Choose two.)

CPU limit exception due to the complexity of the query.

SOQL query row limit exception due to the number of contacts.

SOQL query limit exception due to the number of contacts.

SOQL query row limit exception due to the number of accounts.

NO.112 A developer wants to create a custom object to track Customer Invoices.How should Invoices and Accounts be related to ensure that all Invoices are visible to everyone with access to an Account?

The Account should have a Master-Detail relationship to the Invoice.

The Invoice should have a Master-Detail relationship to the Account

The Account should have a Lookup relationship to the Invoice

The Invoice should have a Lookup relationship to the Account Previous

NO.113 Which two characteristics are true for Aura component events?

Calling event, stopPropagation ( ) may or may not stop the event propagation based of the current propagation phase.

If a container component needs to handle a component event, add a handleFacets=” attribute to Its handler.

Only parent components that create subcomponents (either in their markup or programmatically) can handle events.

The event propagates to every owner In the containment hierarchy.

NO.114 A developer Is asked to create a Visualforce page that lists the contacts owned by the current user. This component will be embedded In a Lightning page.
Without writing unnecessary code, which controller should be used for this purpose?

Standard list controller

Standard controller

Lightning controller

Custom controller

NO.115 A developer must provide a custom user interface when users edit a Contact. Users must be able to use the interface in Salesforce Classic and Lightning Experience.
What should the developer do to provide the custom user interface?

Override the Contact’s Edit button with a Visualforce page in Salesforce Classic and a Lightning component in Lightning Experience.

Override the Contact’s Edit button with a Visualforce page in Salesforce Classic and a Lightning page inLightning Experience.

Override the Contact’s Edit button with a Lightning component in Salesforce Classic and a Lightning component in Lightning Experience.

Override the Contact’s Edit button with a Lightning page in Salesforce Classic and a Visualforce page in Lightning Experience.

NO.116 What are two uses for External IDs? (Choose two.)

To create relationships between records imported from an external system.

To create a record in a development environment with the same Salesforce ID as in another environment

To identify the sObject type in Salesforce

To prevent an import from creating duplicate records using Upsert

NO.117 A developer is writing tests for a class and needs to insert records to validate functionality.
Which annotation method should be used to create record for every method in the test class?

@isTest (SeeAllData-true)

@FreTest

@TestSetup

@StartTest

NO.118 A developer creates a custom exception as shown below:
What are two ways the developer can fire the exception in Apex? Choose 2 answers

Throw new ParityException (parity does not match);

New ParityException( );

New ParityException (parity does not match);

Throw new parityException ( );

NO.119 Which code statement includes an Apex method named updateaccounts in the Class AccountCont rolles for use in a Lightning web component?

NO.120 A developer is debugging the following code to determinate why Accounts are not being created Account a = new Account(Name = ‘A’); Database.insert(a, false); How should the code be altered to help debug the issue?

Add a System.debug() statement before the insert method

Add a try/catch around the insert method

Set the second insert method parameter to TRUE

Collect the insert method return value a Saveresult record

NO.121 Which statement generates a list of Leads and Contacts that have a field with the phrase ‘ACME’?

List <sObject> searchList = (FIND “*ACME*” IN ALL FIELDS RETURNING Contact, Lead);

List<List <sObject>> searchList = (FIND “*ACME*” IN ALL FIELDS RETURNING Contact, Lead);

Map <sObject> searchList = (FIND “*ACME*” IN ALL FIELDS RETURNING Contact, Lead);

List<List < sObject>> searchList = (SELECT Name, ID FROM Contact, Lead WHERE Name like ‘%ACME%’);

Salesforce DEX-450 exam consists of 60 multiple-choice questions and candidates have 105 minutes to complete it. DEX-450 exam covers a wide range of topics, including Apex classes and triggers, Visualforce pages and components, Lightning components, and web services. To pass the exam, candidates must score at least 68% (41 out of 60 questions) and the exam fee is $200.

Updated Jul-2023 Pass DEX-450 Exam – Real Practice Test Questions: https://www.testkingit.com/Salesforce/latest-DEX-450-exam-dumps.html

DEX-450 Exam Dumps, DEX-450 Practice Test Questions [Q99-Q121]

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