Apr 30, 2024 Newest DEX-450 Exam Dumps – Achieve Success in Actual DEX-450 Exam
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Salesforce certifications are an excellent way for professionals to demonstrate their expertise in the Salesforce ecosystem. The Salesforce Certified Programmers are responsible for developing innovative applications using Salesforce technologies. These developers are skilled in Apex, Visualforce, and Lightning. The Salesforce DEX-450 Certification Exam is specifically designed to test the developers' programming abilities using Apex and Visualforce in the Lightning Experience.
To prepare for the Salesforce DEX-450 certification exam, candidates should have a solid understanding of the Salesforce platform and experience developing for the platform using Apex and Visualforce. They should also have a good knowledge of Lightning Experience and be familiar with Lightning Components. Candidates should study and practice using Salesforce development resources, including the Apex Developer Guide, the Visualforce Developer Guide, and the Lightning Component Developer Guide, as well as attending training courses and workshops.
NEW QUESTION # 53
While developing an Apex class with custom search functionality that will be launched from a Lightning Web Component, how can the developer ensure only records accessible to the currently logged in user are displayed?
- A.
- B.
- C.
- D.
Answer: C
NEW QUESTION # 54
On a Visualforce page with a custom controller, how should a developer retrieve a record by using an ID that is passed on the URL?
- A. Create a new PageReference object with the Id.
- B. Use the tag in the Visualforce page.
- C. Use the constructor method for the controller.
- D. Use the $Action.View method in the Visualforce page.
Answer: C
NEW QUESTION # 55
How should a custom user interface be provided when a user edits an Account in Lightning Experience?
- A. Override the Account's Edit button with Lightning page.
- B. Override the Account's Edit button with Lightning Flow
- C. Override the Account's Edit button with Lightning component.
- D. Override the Account's Edit button with Lightning Action
Answer: C
NEW QUESTION # 56
When would the use of Heroku Postgres be appropriate?
- A. To store and retrieve data using the Structured Query Language.
- B. To interconnect Microsoft SQL servers to Heroku Applications.
- C. To store user generated pictures and Word documents.
- D. To cache commonly accessed data for faster retrieval.
Answer: A
NEW QUESTION # 57
What are two considerations for deciding to use a roll-up summary field? Choose 2 answer's partner.
- A. Roll-up cannot be performed on formula fields that use cross-object references or on-the-fly calculations such as NOW().
- B. Roll-up summary can be performed on formula fields, but if their formula contains an #Error result, it may affect the summary value.
- C. Roll-up cannot be performed on formula fields.
- D. Roll-up summary fields do not cause validation rules on the parent object unless that object is edited separately.
Answer: A,B
NEW QUESTION # 58
What are the methods used to show input in classic and lightning ?
- A. Use visualforce page in classic and lightning component in lightning
Answer: A
NEW QUESTION # 59
How can a developer avoid exceeding governor limits when using an Apex Trigger?choose 2 answers
- A. By performing DML transactions on lists of SObjects.
- B. By using a helper class that can be invoked from multiple triggers.
- C. By using the Database class to handle DML transactions.
- D. By using Maps to hold data from query results.
Answer: A,D
NEW QUESTION # 60
What is the accurate statement about with sharing keyword? choose 2 answers
- A. Both inner and outer class can be declared as with sharing
- B. Inner class inherit the sharing setting from the container class
- C. Inner class do not inherit the sharing setting from the container class
- D. Either inner class or outer classes can be declared as with sharing but not both
Answer: A,C
NEW QUESTION # 61
A developer has the following class and trigger code:
public class InsuranceRates { public static final Decimal smokerCharge = 0.01; } trigger ContactTrigger on Contact (before insert) { InsuranceRates rates = new InsuranceRates(); Decimal baseCost = XXX; } Which code segment should a developer insert at the XXX to set the baseCost variable to the value of the class variable smokerCharge?
- A. Rates.getSmokerCharge()
- B. InsuranceRates.smokerCharge
- C. Rates.smokerCharge
- D. ContactTrigger.InsuranceRates.smokerCharge
Answer: B
NEW QUESTION # 62
Which statement generates a list of Leads and Contacts that have a field with the phrase 'ACME'?
- A. Map <sObject> searchList = (FIND "*ACME*" IN ALL FIELDS RETURNING Contact, Lead);
- B. List<List <sObject>> searchList = (FIND "*ACME*" IN ALL FIELDS RETURNING Contact, Lead);
- C. List <sObject> searchList = (FIND "*ACME*" IN ALL FIELDS RETURNING Contact, Lead);
- D. List<List < sObject>> searchList = (SELECT Name, ID FROM Contact, Lead WHERE Name like '%ACME%');
Answer: B
NEW QUESTION # 63
A business implemented a magnification plan to encourage its customers to watch some educational videos.
Customers can watch videos over several days, and their progress is recorded. Award points are granted to customers for all completed videos. When the video is marked as completed in Salesforce, an external web service must be called so that points can be awarded to the user.
A developer implemented these requirements in the after update trigger by making a calf to an external web service. However, a System.CalloutException is occurring.
What should the developer do to fix this error?
- A. Replace the after update trigger with a before insert trigger.
- B. Surround the external call with a try-catch block to handle the exception.
- C. Move the callout to an asynchronous method with structure (callout=true) annotation.
- D. Write a REST service to integrate with the external web service.
Answer: C
NEW QUESTION # 64
A developer encounters APEX heap limit errors in a trigger.
Which two methods should the developer use to avoid this error? (Choose two.)
- A. Use the transient keyword when declaring variables.
- B. Use SOQL for loops instead of assigning large queries results to a single collection and looping through the collection.
- C. Remove or set collections to null after use.
- D. Query and store fields from the related object in a collection when updating related objects.
Answer: A,B
NEW QUESTION # 65
A developer is creating an app that contains multiple Lightning web components.
One of the child components is used for navigation purposes. When a user click a button called.. component, the parent component must be alerted so it can navigate to the next page.
How should this be accomplished?
- A. Call a method in the Apex controller.
- B. Update a property on the parent.
- C. Fire a notification.
- D. Create a custom event.
Answer: D
NEW QUESTION # 66
While writing a test class that covers an OpportunityLineItem trigger, a Developer is unable to create a standard PriceBook since one already exists in the org.
How should the Developer overcome this problem?
- A. Use @IsTest(SeeAllData=true) and delete the existing standard PriceBook.
- B. Use @TestVisible to allow the test method to see the standard PriceBook.
- C. Use Test.loadData() and a Static Resource to load a standard Pricebook.
- D. Use Test.getStandardPricebookId() to get the standard PriceBook ID.
Answer: D
NEW QUESTION # 67
In which order does Salesforce execute events upon saving a record?
- A. Validation Rules; Before Triggers; After Triggers; Assignment Rules; Workflow Rules; Commit
- B. Before Triggers; Validation Rules; After Triggers; Workflow Rules; Assignment Rules; Commit
- C. Before Triggers; Validation Rules; After Triggers; Assignment Rules; Workflow Rules; Commit
- D. Validation Rules; Before Triggers; After Triggers; Workflow Rules; Assignment Rules; Commit
Answer: C
NEW QUESTION # 68
What is the maximum number of SOQL queries used by the following code? List<Account> aList = [SELECT Id FROM Account LIMIT 5]; for (Account a : aList){ List<Contact> cList = [SELECT Id FROM Contact WHERE AccountId = :a.Id); }
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 69
How can a developer set up a debug log on a specific user?
- A. Set up a trace flag for the user, and define a logging level and time period for the trace.
- B. Create Apex code that logs code actions into a custom object.
- C. It is not possible to setup debug logs for users other than yourself.
- D. Ask the user for access to their account credentials, log in as the user and debug the issue.
Answer: A
NEW QUESTION # 70
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. SELECT lead(id, name), account(id, name), contact(id,name) FROM Lead, Account, Contact WHERE Name = 'Universal Containers'
- B. IND 'Universal Containers' IN Name Fields RETURNING lead(id, name), account(id,name), contact(id,name)
- C. SELECT Lead.id, Lead. Name, Account.id, Account.Name, Contact.Id, Contact. Name FROM Lead, Account, Contact WHERE CompanyName = 'Universal Containers'
- D. FIND 'Universal Containers' IN CompanyName Fields RETURNING lead(id,name), account (id,name), contact(id,name)
Answer: B
NEW QUESTION # 71
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?
- A. The Toggle component should call a method in the Temperature component.
- B. Use Lightning Message Service to communicate between the component.
- C. Use Lightning Message Service to communicate between the components.
- D. Create a custom event to handle the communicate between the components.
Answer: D
NEW QUESTION # 72
How would a developer determine if a CustomObject__c record has been manually shared with the current user in Apex?
- A. By querying CustomObject__Share.
- B. By querying the role hierarchy.
- C. By calling the isShared() method for the record.
- D. By calling the profile settings of the current user.
Answer: A
NEW QUESTION # 73
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