172 Q&As in UPDATED DEX-450 Exam Questions Certification Test Engine to PDF
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Salesforce DEX-450 exam covers a wide range of topics related to programmatic development using Apex and Visualforce in Lightning Experience. Some of the topics covered in the exam include Apex classes and triggers, Visualforce pages and components, Lightning Component Framework, and Salesforce Object Query Language (SOQL). DEX-450 exam also covers topics such as debugging and testing Apex code, managing data with Apex, and managing the user interface with Visualforce.
Salesforce DEX-450 Certification Exam is intended for experienced developers who work in the Salesforce ecosystem. Candidates must have experience with Visualforce, Apex, and the Salesforce platform. They should be proficient in developing applications that use programming languages, such as JavaScript and HTML. DEX-450 exam covers various topics, including Apex and Visualforce development, testing, and deployment. Programmatic Development using Apex and Visualforce in Lightning Experience certification also covers the fundamentals of the Lightning Component Framework.
NEW QUESTION # 48
What is a capability of the Developer Console?
- A. Execute Anonymous Apex code, Create/Edit code, view Debug Logs.
- B. Execute Anonymous Apex code, Create/Edit code, Deploy code changes.
- C. Execute Anonymous Apex code, Run REST API, deploy code changes.
- D. Execute Anonymous Apex code, Run REST API, create/Edit code.
Answer: A
NEW QUESTION # 49
How should a developer create a new custom exception class?
- A. (Exception)CustomException ex = new Exception();
- B. CustomException ex = new (CustomException)Exception();
- C. public class CustomException implements Exception{}
- D. public class CustomException extends Exception{}
Answer: D
NEW QUESTION # 50
Universal Containers has created a unique process for tracking container repairs. A custom field, status__c, has been created within the container__c custom object. A developer is tasked with sending notifications to multiple external systems every time the value of the status__picklist changes.
Which two tools should the developer use to meet the business requirement and ensure low maintenance of the solution?
Choose 2 answers
- A. Platform event
- B. Record-Triggered flow
- C. Apex trigger
- D. Apex callouts
Answer: A,D
NEW QUESTION # 51
A developer wants to override a button using Visualforce on an object.
What is the requirement?
- A. The object record must be instantiated in a controller or extension.
- B. The controller or extension must have a PageReference method.
- C. The action attribute must be set to a controller method.
- D. The standardController attribute must be set to the object.
Answer: D
NEW QUESTION # 52
A developer created a new trigger that inserts a Task when a new Lead is created. After deploying to production, an outside integration chat reads task records is periodically reporting errors.
Which change should the developer make to ensure the integration is not affected with minimal impact to business logic?
- A. Use the Database method with all or None set to false
- B. Deactivate the trigger before the integration runs.
- C. Use a try-catch block after the insert statement.
- D. Remove the Apex class from the integration user's profile.
Answer: D
NEW QUESTION # 53
A newly hired developer discovers that there are multiple triggers on the case object.
What should the developer consider when working with triggers?
- A. Developers must dictate the order of trigger execution.
- B. Trigger execution order is based on creation date and time.
- C. Unit tests must specify the trigger being tested.
- D. Trigger execution order is not guaranteed for the same sObject.
Answer: D
NEW QUESTION # 54
Which annotation exposes an Apex class as a RESTful web service?
- A. AuraEnabled
- B. Httplnvocable
- C. RestResource
- D. Remote Action
Answer: A
NEW QUESTION # 55
What are three ways for 2 developer to execute tests in an org? Choose 3 answers
- A. Tooling API
- B. Metadata APT
- C. Setup Menu
- D. SalesforceDX
- E. Bulk API
Answer: A,C,D
NEW QUESTION # 56
When are code coverage calculations updated?
- A. When Apex code is saved.
- B. When changes are made to an organization's configuration.
- C. When unit tests are run on an organization.
- D. When a deployment is validated.
Answer: C
NEW QUESTION # 57
What is the debug output of the following Apex code?
Decimal theValue;
System.debug (theValue);
- A. Undefined
- B. null
- C. 0.0
- D. 0
Answer: B
NEW QUESTION # 58
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?
- A. Create a custom field on the child object of type Foreign Key
- B. Create and populate a custom field on the parent object marked as an External ID.
- C. Create a custom field on the child object of type External Relationship.
- D. Create and populate a custom field on the parent object marked as Unique
Answer: B
NEW QUESTION # 59
On which object can an administrator create a roll-up summary field?
- A. Any object that is on the child side of a lookup relationship.
- B. Any object that is on the detail side of a master-detail relationship.
- C. Any object that is on the master side of a master-detail relationship.
- D. Any object that is on the parent side of a lookup relationship.
Answer: C
NEW QUESTION # 60
Universal Containers wants Opportunities to no longer be editable when it reaches the Closed/Won stage.
Which two strategies can a developer use to accomplish this?
Choose 2 answers
- A. Use a validation rule.
- B. Use a trigger.
- C. Use an after-save flow.
- D. Use the Process Automation settings.
Answer: A,B
NEW QUESTION # 61
What are three considerations when using the @InvocableMethod annotation in Apex?
Choose 3 answers
- A. Only one method using the @InvocableMethod annotqation can be defined per Apex class. (Missed)
- B. A method using the @InvocableMethod annotation must be declared as static (Missed)
- C. A method using the @InvocableMethod annotation can be declared as Public or Global. (Missed)
- D. A method using the @InvocableMethod annotation must define a return value.
- E. A method using the @InvocableMethod annotation can have multiple input parameters.
Answer: A,B,C
NEW QUESTION # 62
A developer has a unit test that is failing. To identify the issue, the developer copies the code inside the test method and executes it via the Execute Anonymous Apex Tool. The code then executes without failing. Why did the unit test failed, but not the Execute Anonymous?
- A. The test method use a try/catch block
- B. The test method relies on existing data in the database
- C. The test method has a syntax error in the code.
- D. The test method calls an @future method.
Answer: B
NEW QUESTION # 63
Management asked for opportunities to be automatically created for accounts with annual revenue greater than $1,000,000. A developer created the following trigger on the Account object to satisfy this requirement.
Users are able to update the account records via the UI and can see an opportunity created for high annual revenue accounts. However, when the administrator tries to upload a list of 179 accounts using Data Loader, It fails with system. Exception errors.
Which two actions should the developer take to fix the code segment shown above?
Choose 2 answers
- A. Query for existing opportunities outside the for loop.
- B. Use Database.query to query the opportunities.
- C. Move the DML that saves opportunities outside the for loop.
- D. Check if all the required fields for Opportunity are being added on creation.
Answer: A,C
NEW QUESTION # 64
What is the order of operations when a record is saved in Salesforce?
- A. Triggers, workflow, process flows, commit
- B. Workflow, process flows, triggers, commit
- C. Process flows, triggers, workflow, commit
- D. Workflow, triggers, process flows, commit
Answer: A
NEW QUESTION # 65
Universal Containers wants Opportunities to be locked from editing when reaching the Closed/Won stage.
Which two strategies should a developer use to accomplish this? Choose 2 answers
- A. Use a validation rule.
- B. Use a trigger.
Answer: A,B
NEW QUESTION # 66
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