DEX-450 Practice Exams and Training Solutions for Certifications [Q99-Q121]

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DEX-450 Practice Exams and Training Solutions for Certifications

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To prepare for the Salesforce DEX-450 certification exam, candidates should have a solid understanding of the Apex programming language, Visualforce framework, and Lightning Components. Candidates should also be familiar with the Salesforce development process, including designing, developing, testing, and deploying custom applications. Studying the Salesforce documentation, attending training courses, and practicing hands-on development are all effective ways to prepare for DEX-450 exam. Passing DEX-450 exam can enhance a developer’s career prospects and demonstrate their expertise in programmatic development on the Salesforce platform.

NEW QUESTION 99
A developer identifies the following triggers on the Expense_c object:
DeleteExpense,
applyDefaultstoexpense
validateexpenseupdate;
The triggers process before delete, before insert, and before update events respectively.
Which two techniques should the developer implement to ensure trigger best practice are followed?

Unify the before insert and before update triggers and use Process Builder for the delete action.

Maintain all three triggers on the Expense__c object, but move the Apex logic out for the trigger definition.

Create helper classes to execute the appropriate logic when a record is saved.

Unify all three triggers in a single trigger on the Expense__c object that includes all events.

NEW QUESTION 100
Which two are phases in the Aura application event propagation framework? Choose 2 answers

Emit

Control

Default

Bubble

NEW QUESTION 101
The operation manager at a construction company uses a custom object called Machinery to manage the usage and maintenance of its cranes and other machinery. The manager wants to be able to assign machinery to different constructions jobs, and track the dates and costs associated with each job. More than one piece of machinery can be assigned to one construction job.
What should a developer do to meet these requirements?

Create a lookup field on the Construction Job object to the Machinery object.

Create a lookup field on the Machinery object to the Construction Job object.

Create a junction object with Master-Detail Relationship to both the Machinery object and the Construction Job object.

Create a Master-Detail Lookup on the Machinery object to the Construction Job object.

NEW QUESTION 102
Universal Containers has an order system that uses an Order Number to identify an order for customers and service agents. Order records will be imported into Salesforce.
How should the Order Number field be defined in Salesforce?

Direct Lookup

External ID and Unique

Lookup

Indirect Lookup

NEW QUESTION 103
What are two valid options for iterating through each Account in the collection List<Account> named AccountList? (Choose two.)

for (Account theAccount : AccountList) {…}

for(AccountList) {…}

for (List L : AccountList) {…}

for (Integer i=0; i < AccountList.Size(); i++) {…}

NEW QUESTION 104
For which three items can 2 trace flag be configured?
Choose 3 answers

Flow

Apex Class

User

Apex Trager

Visualforce

NEW QUESTION 105
Which code displays the contents of a Visualforce page as a PDF?

<apex:page contentType=”pdf”>

<apex:page rendersAs=”application/pdf”>

<apex:page contentType=”application/pdf”>

<apex:page renderAs=”pdf”>

NEW QUESTION 106
An org has an existing Flow that creates an Opportunity with an Update Records element. A developer update the Flow to also create a Contact and store the created Contact’s ID on the Opportunity.
Which update should the developer make in the Flow?

Add a new Get Records element.

Add a new Update Records element.

Add a new Quick Action element(of type Create).

Add a new Create Records element.

NEW QUESTION 107
Which two statements are acceptable for a developer to use inside procedural loops?

Contact con = new Contact();

ContactList.remove(i);

Delete contactList;

Account a = [SELECT id, Name FROM account WHERE id = : con.AccountId LIMIT 1];

NEW QUESTION 108
A workflow updates the value of a custom field for an existing Account.
How can a developer access the updated custom field value from a trigger?

By writing, a Before Update trigger and accessing the field value from Trigger.new

By writing an After Insert trigger and accessing the field value from Trigger.old

By writing an After Update trigger and accessing the field value from Trigger.old

By writing a Before Insert trigger and accessing the field value from Trigger.new

NEW QUESTION 109
A Licensed_Professional__c custom object exist in the system with two Master-Detail fields for the following objects: Certification__c and Contact. Users with the “Certification Representative” role can access the Certification records they own and view the related Licensed Professionals records, however users with the “Salesforce representative” role report they cannot view any Licensed professional records even though they own the associated Contact record. What are two likely causes of users in the “Sales Representative” role not being able to access the Licensed Professional records? Choose 2 answers

The organization’s sharing rules for Licensed_Professional__c have not finished their recalculation process. (Missed)

The organization recently modified the Sales representative role to restrict Read/Write access to Licensed_Professional__c

The organization has a private sharing model for Certification__c, and Contact is the primary relationship in the Licensed_Professional__c object

The organization has a private sharing model for Certification__c, and Certification__c is the primary relationship in the Licensed_Professional__c object. (Missed)

NEW QUESTION 110
What are two benefits of using External IDs?
Choose 2 answers

An External ID field can be used Co reference an ID from another external system.

An External ID can be a formula field to help create a unique key from two fields in Salesforce.

An External ID can be used with Salesforce Mobile to make external data visible.

An External ID is indexed and can improve the performance of SOQl quenes.

NEW QUESTION 111
What should be used to create scratch orgs?

Sandbox refresh

Salesforce CLI

Developer Console

Workbench

NEW QUESTION 112
Which two characteristics are true for Lightning Web Component custom events?
Choose 2 answers

Data may be passed In the payload of a custom event using a wire decorated properties.

By default a custom event only propagates to its immediate container and to its immediate child component.

By default a custom event only propagates to it’s immediate container.

Data may be passed in the payload of a custom event using a property called detail.

NEW QUESTION 113
Which two statements can a developer use to throw a custom exception of type MissingFieldValueException? Choose 2 answers.

Throw Exception (new MissingFieldValueException());

Throw (MissingFieldValueException, ‘Problem occurred’);

Throw new MissingFieldValueException();

Throw new MissingFieldValueException (‘Problem occurred’);

NEW QUESTION 114
An Approval Process is defined in the Expense_Item__c. A business rule dictates that whenever a user changes the Status to ‘Submitted’ on an Expense_Report__c record, all the Expense_Item__c records related to the expense report must enter the approval process individually. Which approach should be used to ensure the business requirement is met?

Create a Process Builder on Expense_Report__c with a ‘Submit for Approval’ action type to submit all related Expense_Item__c records when the criteria is met.

Create two Process Builder, one on Expense_Report__c to mark the related Expense_Item__c as submittable and the second on Expense_Item__c to submit the records for approval.

Create a Process Builder on Expense_Report__c to mark the related Expense_Item__c as submittable and trigger on Expense_item__c to submit the records for approval.

Create a Process Builder on Expense_Report__c with an ‘Apex’ action type to submit all related Expense_Item__c records when the criteria is met.

NEW QUESTION 115
A company has a custom object named Warehouse. Each Warehouse record has a distinct record owner, and is related to a parent Account in Salesforce.Which kind of relationship would a developer use to relate the Account to the Warehouse?

One -to -Many

Lookup

Master -Detail

Parent -Child

NEW QUESTION 116
A developer needs to display all of the available fields for an object.
In which two ways can the developer retrieve the available fields if the variable myObject represents the name of the object? (Choose two.)

Use myObject.sObjectType.getDescribe().fieldSet() to return a set of fields.

Use mySObject.myObject.fields.getMap() to return a map of fields.

Use Schema.describeSObjects(new String[]{myObject})[0].fields.getMap() to return a map of fields.

Use getGlobalDescribe().get(myObject).getDescribe().fields.getMap() to return a map of fields.

NEW QUESTION 117
A developer must implement a CheckPaymentProcessor class that provides check processing payment capabilities that adhere to what defined for payments in the PaymentProcessor interface. public interface PaymentProcessor { void pay(Decimal amount); } Which is the correct implementation to use the PaymentProcessor interface class?

Public class CheckPaymentProcessor implements PaymentProcessor {
public void pay(Decimal amount) {}
}

Public class CheckPaymentProcessor implements PaymentProcessor {
public void pay(Decimal amount);
}

Public class CheckPaymentProcessor extends PaymentProcessor {
public void pay(Decimal amount);
}

Public class CheckPaymentProcessor extends PaymentProcessor {
public void pay(Decimal amount) {}
}

NEW QUESTION 118
Which type of code represents the Model in the MVC architecture when using Apex and Visualforce pages?

A Controller Extension method that saves a list of Account records

Custom JavaScript that processes a list of Account records

A list of Account records returned from a Controller Extension method

A Controller Extension method that uses SOQL to query for a list of Account records

NEW QUESTION 119
A developer wants to override a button using Visualforce on an object.
What is the requirement?

The controller or extension must have a PageReference method.

The standardController attribute must be set to the object.

The action attribute must be set to a controller method.

The object record must be instantiated in a controller or extension.

NEW QUESTION 120
Which two statements are true about using the @testSetup annotation in an Apex test class?
Choose 2 answers

Records created in the test setup method cannot be updated in individual test methods.

Qo The @testSetup annotation is not supported when the GisTest(SeeAllData=True) annotation is used.

Test data is inserted once for all test methods in a class.

A method defined with the @testSetup annotation executes once for each test method in the test class and counts towards system limits.

NEW QUESTION 121
How would a developer change the field type of a custom field on the Account object from string to an integer?

Make the changes in the developer console, and then the change will automatically be reflected in the Apex code.

Mate the change in the declarative UI, then update the field type to an integer field in the Apex code.

Make the change in the declarative UI, an then the change will automatically be reflected in the Apex code.

Remove all references in the code, make the change in the declarative UI, and restore the references with the new type.

The DEX-450 certification exam consists of 60 multiple-choice questions that need to be completed within 105 minutes. To pass the exam, candidates need to score at least 65%. DEX-450 exam can be taken in-person at a testing center or remotely online.

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