BEST Verified Salesforce DEX-450 Exam Questions (2025)
The Best Practice Test Preparation for the DEX-450 Certification Exam
To take the DEX-450 certification exam, candidates must have a solid understanding of Apex and Visualforce programming languages, as well as experience with the Salesforce Lightning platform. They should also be familiar with the Salesforce development process, including designing, testing, and deploying custom code.
NEW QUESTION # 112
Universal Containers (UC) uses a custom object called Vendor. The Vendor custom object has a master-detail relationship with the standard Account object.
Based on some internal discussions, the UC administrator tried to change the master-detail relationship to a lookup relationship, but was not able to do so.
What is a possible reason that this change was not permitted?
- A. Some of the Vendor records have null for the Account field.
- B. The Account object has a roll-up summary field on the Vendor object.
- C. The organization wide default for the Vendor object is Public Read/Write.
- D. The Account object does not allow changing a field type for a custom field.
Answer: B
NEW QUESTION # 113
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?
- A. @AuraEnabled(cacheable=true)
public static List<Opportunity> search(String term) { /* implementation*/ } - B. @AuraEnabled(cacheable=true)
public List<Opportunity> search(String term) { /*implementation*/ } - C. @AuraEnabled(cacheable=false)
public static List<Opportunity> search(String term) { /*implementation*/ } - D. @AuraEnabled(cacheable=false)
public List<Opportunity> search(String term) { /*implementation*/ }
Answer: A
NEW QUESTION # 114
When a user edits the postal Code on an Account, a custom Account text field named. Timezone' must be updated based on the values in a PostalCodeToTimezone_c custom ogject.
Which two automationtools can be used to implement this feature?
Choose 2 answers
- A. Quick actions
- B. Account trigger
- C. Approval process
- D. Fast field Updates record-triggered flow
Answer: B,D
NEW QUESTION # 115
Which query should a developer use to obtain the Id and Name of all the Leads, Accounts, and Contacts that have the company name "Universal Containers"?
- A. FIND 'Universal Containers' IN CompanyName Fields RETURNING lead(id,name), account (id,name), contact(id,name)
- B. SELECT lead(id, name), account(id, name), contact(id,name) FROM Lead, Account, Contact WHERE Name = 'Universal Containers'
- C. SELECT Lead.id, Lead. Name, Account.id, Account.Name, Contact.Id, Contact. Name FROM Lead, Account, Contact WHERE CompanyName = 'Universal Containers'
- D. IND 'Universal Containers' IN Name Fields RETURNING lead(id, name), account(id,name), contact(id,name)
Answer: D
NEW QUESTION # 116
What should a developer use to script the deployment and unit test execution as part of continuous integration?
- A. Developer Console
- B. Salesforce CLI
- C. Execute Anonymous
- D. VS Code
Answer: A
NEW QUESTION # 117
Universal Containers wants to automatically assign new cases to the appropriate support representative based on the case origin. They have created a custom field on the Case object to store the support representative name.
What is the best solution to assign the case to the appropriate support representative?
- A. Use a validation rule on the Case object.
- B. Use a trigger on the Case object.
- C. Use an Assignment Flow element.
- D. Use a formula field on the Case object.
Answer: B
NEW QUESTION # 118
Assuming that 'name; is a String obtained by an <apex:inputText> tag on a Visualforce page. Which two SOQL queries performed are safe from SOQL injections? Choose 2 answers
- A. String query = '%' + name + '%';
List<Account> results = [SELECT Id FROM Account WHERE Name LIKE :query]; - B. String query = 'SELECT Id FROM Account WHERE Name LIKE \''%' + name + '%\''; List<Account> results = Database.query(query);
- C. String query = 'SELECT Id FROM Account WHERE Name LIKE \''%' + name.noQuotes() + '%\''; List<Account> results = Database.query(query);
- D. String query = 'SELECT Id FROM Account WHERE Name LIKE \''%' + String.escapeSingleQuotes(name) + '%\''; List<Account> results = Database.query(query);
Answer: A,D
NEW QUESTION # 119
A developer needs an Apex method that can process Account or Contact records. Which method signature should the developer use?
- A. Public void doWork(sObject theRecord)
- B. Public void doWork(Account Contact)
- C. Public void doWork(Account || Contatc)
- D. Public void doWork(Record theRecord)
Answer: A
NEW QUESTION # 120
The Review__c object has a lookup relationship up to the Job_Application__c object. The Job_Application__c object has a master-detail relationship up the Position__c object. The relationship field names are based on the auto-populated defaults. What is the recommended way to display field data from the related Review__c records on a Visualforce page for a single Position__c record?
- A. Utilize the Standard Controller for position__c and a Controller Extension to query for Review__c data.
- B. Utilize the Standard Controller for Position__c and cross-object Formula fields on the job_Application__c object to display Review__c data.
- C. Utilize the Standard Controller for position__c and expression syntax in the page to display related Review__c data through the job_Application__c object
- D. Utilize the Standard Controller for Position__c and cross-object Formula fields on the Review__c object to display Review__c data.
Answer: A
NEW QUESTION # 121
A developer is asked to prevent anyone other than a user with Sales Manager profile from changing the Opportunity Status to Closed Lost if the lost reason is blank.
Which automation allows the developer to satisfy this requirement in the most efficient manner?
- A. An error condition formula on a validation rule on Opportunity
- B. A record trigger flow on the Opportunity object
- C. An Apex trigger on the Opportunity object
- D. approval process on the Opportunity object
Answer: A
NEW QUESTION # 122
Which two are best practices when it comes to component and application event handling? (Choose two.)
- A. Use component events to communicate actions that should be handled at the application level.
- B. Reuse the event logic in a component bundle, by putting the logic in the helper.
- C. Handle low-level events in the event handler and re-fire them as higher-level events.
- D. Try to use application events as opposed to component events.
Answer: B,C
NEW QUESTION # 123
A developer at Universal Containers is taked with implementing a new Salesforce application that bwill be maintained completely by their company's Salesforce admiknistrator.
Which two options should be considered for buildig out the business logic layerof the application?
Chosse 2 answer
- A. Record-Triggered flows
C, Scheduled - B. Unvocable Actions
- C. Validation Rules
Answer: A,C
NEW QUESTION # 124
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 artifact is part of the Controller according to the MVC architecture?
- A. XML file
- B. HTML file
- C. JavaScript file
- D. Apex class
Answer: D
NEW QUESTION # 125
What can a Lightning Component contain in its resource bundle? Choose 2 answer
- A. Build scripts for minification
- B. CSS styles scoped to the component
- C. Properties files with global settings
- D. Custom client side rendering behavior.
Answer: B,D
NEW QUESTION # 126
What are three characteristics of change set deployments?
Choose 3 answers Sending a change set between two orgs requires a deployment connection.
- A. Change sets can deploy custom settings data.
- B. Sending a change set between two orgs requires a deployment connection.
- C. Deployment is done in a one-way, single transaction.
- D. Change sets can only be used between related organizations.
- E. Change sets can be used to transfer records.
Answer: B,C,D
Explanation:
Change sets can only be used between related organizations:
Change sets require a relationship between the source and target Salesforce orgs, such as a production org and its sandboxes. You cannot use change sets between unrelated Salesforce orgs.
Reference:
Deployment is done in a one-way, single transaction:
When a change set is deployed, it is applied to the target org as a single transaction. If there are any errors in the deployment, the entire transaction is rolled back.
Sending a change set between two orgs requires a deployment connection:
Before sending or deploying a change set, a deployment connection must be established between the source and target orgs. This connection is configured in the setup menu under "Deployment Connections." Incorrect Options:
A . Change sets can deploy custom settings data:
Change sets cannot deploy data, including custom settings data. They only move metadata.
E . Change sets can be used to transfer records:
Records (data) are not supported by change sets; they only facilitate metadata migration.
NEW QUESTION # 127
What are three characteristics of change set deployments?
Choose 3 answers
- A. Change sets can deploy custom settings data.
- B. Sending a change set between two orgs requires a deployment connection.
- C. Change sets can only be used between related organizations.
- D. Change sets can be used to transfer records.
- E. Deployment is done in a one-way, single transaction.
Answer: A,B,D
NEW QUESTION # 128
Which Lightning Web Component custom event property settings enable the event to bubble up the containment hierarchy and cross the Shadow DOM boundary?
- A. bubbles: false, composed: true
- B. bubbles: tnje, composed: false
- C. bubbles: true, composed: true
- D. bubbles: false, composed: false
Answer: C
NEW QUESTION # 129
Which three steps allow a custom Scalable Vector Graphic (SVG) to be included in a Lightning web component?
Choose 3 answers
- A. Upload the SVG as a static resource.
- B. Reference the property in the HTML template.
- C. Import the static resource and provide a JavaScript property for it.
- D. Reference the import in the HTML template.
- E. Import the SVG as a content asset file.
Answer: A,C,D
NEW QUESTION # 130
Which feature should a developer use to update an inventory count on related Product records when the status of an Order is modified to indicate it is fulfilled?
- A. Lightning component
- B. Visualforce page
- C. Process Builder process
- D. Workflow rule
Answer: C
NEW QUESTION # 131
What must the Controller for a Visulforce page utilized to override the standard Opportunity view button?
- A. The StandardSetController to support related lists for pagination
- B. A callback constructor to reference the StandardController
- C. The Opportunity StandardController for pre-built functionality
- D. A constructor that initialized a private Opportunity variable.
Answer: C
NEW QUESTION # 132
Which type of code represents the Controller in MVC architecture on the Force.com platform? (Choose 2)
- A. StandardController system methods that are referenced by Visualforce.
- B. Custom Apex and JavaScript coda that is used to manipulate data.
- C. JavaScript that is used to make a menu item display itself.
- D. A static resource that contains CSS and images.
Answer: A,B
NEW QUESTION # 133
Which code displays the contents of a Visualforce page as a PDF?
- A. <apex:page renderAs=''application/pdf''>
- B. <apex:page contentType-"applic*ticn/pdf''>
- C. <apex:page renderAs-wpdf">
- D. <apex:page contentType-"pdf">
Answer: C
NEW QUESTION # 134
Get Cloudy Consulting (GCC) has a multitude of servers that host its customers' websites. GCC wants to provide a servers status page that is always on display in its call center. It should update in real time with any changes made to any servers. To accommodate this on the server side, a developer created a server Update platform event.
The developer is working on a Lightning web component to display the information.
- A. import ( subscribe, unsubscribe, onError ) from 'lightning/ServerUpdate'
- B. import ( subscribe, unsubscribe, onError ) from 'lightning/MessageChannel'
- C. import ( subscribe, unsubscribe, onError ) from 'lightning/pubsub'
- D. import ( subscribe, unsubscribe, onError ) from 'lightning/empApi '
Answer: D
NEW QUESTION # 135
Universal container wants a list button to display a visualforce page that allows users to edit multiple records which visualforce feature supports this requirement.
- A. Recordsetvar page attribute
Answer: A
NEW QUESTION # 136
......
DEX-450 Exam Dumps, Practice Test Questions BUNDLE PACK: https://www.practicevce.com/Salesforce/DEX-450-practice-exam-dumps.html
Salesforce Developer Certification DEX-450 Sample Questions Reliable: https://drive.google.com/open?id=1IrtG5FzYyw7Fb5raUIYfnWajREfkSWx1