Salesforce DEX-450 Test Engine Practice Test Questions, Exam Dumps
100% Free DEX-450 Daily Practice Exam With 172 Questions
Salesforce DEX-450 exam is designed for professionals who want to validate their knowledge and skills in programmatic development using Apex and Visualforce in Lightning Experience. DEX-450 exam tests the candidate's ability to develop and customize business logic and user interfaces using Apex and Visualforce in the Lightning Experience. Passing DEX-450 exam demonstrates that the candidate has the expertise to build custom applications on the Salesforce platform, leveraging the power of Apex and Visualforce.
The DEX-450 certification exam measures the knowledge and skills required to build custom applications on the Salesforce platform using Apex and Visualforce in Lightning Experience. It covers a range of topics including Apex programming syntax, Apex data types, Apex controllers, Apex triggers, Visualforce pages, and Lightning components. DEX-450 exam also covers best practices for designing and implementing custom applications on the Salesforce platform.
NEW QUESTION # 52
A developer runs the following anonymous code block:List<Account> acc = [SELECT Id FROM Account LIMIT 10];Delete acc;Database.emptyRecycleBin(acc);system.debug(Limits.getDMLStatements()+ ', '
+Limits.getLimitDMLStatements());What is the result?
- A. 2, 150
- B. 150, 2
- C. 11, 150
- D. 150, 11
Answer: A
NEW QUESTION # 53
Given the code below:
What should a developer do to correct the code so that there is no chance of hitting a governor limit?
- A. Add a WHERE clause to the first SELECT SOQL statement.
- B. combine the two SELECT statements into a single SOQL statement.
- C. Add a LIMIT clause to the first SELECT SOQL statement.
- D. Rework the code and eliminate the for loop.
Answer: A
NEW QUESTION # 54
A developer is asked to create a custom visualforce page that will be used as a dashboard component. Which three are valid controller options for this page? Choose 3 answers
- A. Use a standard controller with extensions
- B. Use a custom controller
- C. Use a standard controller
- D. Use a custom controller with extensions
- E. Do not specify a controller
Answer: A,B,C
NEW QUESTION # 55
How can a developer avoid exceeding governor limits when using an Apex Trigger?choose 2 answers
- A. By using Maps to hold data from query results.
- B. By performing DML transactions on lists of SObjects.
- C. By using a helper class that can be invoked from multiple triggers.
- D. By using the Database class to handle DML transactions.
Answer: A,B
NEW QUESTION # 56
Which two platform features allow for the use of unsupported languages? Choose 2 answers
- A. Docker
- B. Buildpacks
- C. App.json
- D. Heroku Acm
Answer: A,B
NEW QUESTION # 57
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 List<Opportunity> search(String term) { /*implementation*/ } - B. @AuraEnabled(cacheable=false)
public static List<Opportunity> search(String term) { /*implementation*/ } - C. @AuraEnabled(cacheable=false)
public List<Opportunity> search(String term) { /*implementation*/ } - D. @AuraEnabled(cacheable=true)
public static List<Opportunity> search(String term) { /* implementation*/ }
Answer: D
NEW QUESTION # 58
The sales management team requires that the lead source field of the Lead record be populated when Lead is converted. What would a developer use to ensure that a user populates the Lead source field?
- A. Workflow rule
- B. Validation rule
- C. Process builder
- D. Formula field
Answer: B
NEW QUESTION # 59
What are three characteristics of change set deployments?
Choose 3 answers
- A. Change sets can only be used between related organizations.
- B. Deployment is done in a one-way, single transaction.
- C. Change sets can deploy custom settings data.
- D. Sending a change set between two orgs requires a deployment connection.
- E. Change sets can be used to transfer records.
Answer: C,D,E
NEW QUESTION # 60
A developer needs to update an unrelated object when a record gets saved. Which two trigger types should the developer create?
- A. Before update
- B. After insert
- C. Before insert
- D. After update
Answer: A,C
NEW QUESTION # 61
A recursive transaction is limited by a DML statement creating records for these two objects:
1. Accounts
2. Contacts
The Account trigger hits a stack depth of 16.
Which statement is true regarding the outcome of the transaction?
- A. The transaction succeeds and all the changes are committed to the database.
- B. The transaction fails only if the Contact trigger stack depth is greater or equal to 16.
- C. The transaction fails and all the changes are rolled back.
- D. The transaction succeeds as long as the Contact trigger stack depth is less than 16.
Answer: A
NEW QUESTION # 62
What are two use cases for executing Anonymous Apex code? Choose 2 answers
- A. To schedule an Apex class to run periodically
- B. To add unit test code coverage to an org
- C. To delete 15,000 inactive Accounts In a single transaction after a deployment
- D. To run a batch Apex class to update all Contacts
Answer: A,D
NEW QUESTION # 63
A developer is asked to write negative tests as part of the unit testing for a method that calculates a person's age based on birth date. What should the negative tests include?
- A. Assert that past dates are accepted by the method.
- B. Assert that a null value is accepted by the method.
- C. Assert that future dates are rejected by the method.
- D. Throwing a custom exception in the unit test.
Answer: C
NEW QUESTION # 64
Which two statements are accurate regarding Apex classes and interfaces?
Choose 2 answers
- A. Interface methods are public by default.
- B. A top-level class can only have one inner class level.
- C. Inner classes are public by default.
- D. Classes are final by default.
Answer: A,B
NEW QUESTION # 65
A developer wants to invoke on outbound message when a record meets a specific criteria.
Which three features satisfy this use case?
Choose 3 answer
- A. Process builder can be used to check the record criteria and send an outbound message with Apex Code.
- B. Visual Workflow can be used to check the record criteria and send an outbound message without Apex Code.
- C. Process builder can be used to check the record criteria and send an outbound messagewithout Apex Code.
- D. Approval Process has the capacity to check the record criteria and send an outbound message without Apex Code
- E. workflows can be used to check the record criteria and send an outbound message.
Answer: A,D,E
NEW QUESTION # 66
Which statement should a developer avoid using inside procedural loops? (Choose 2)
- A. System.debug('Amount of CPU time (in ms) used so far: ' + Limits.getCpuTime() );
- B. If(o.accountId == a.id)
- C. Update contactList;
- D. List contacts = [SELECT Id, Salutation, FirstName, LastName, Email FROM Contact WHERE AccountId = :a.Id];
Answer: C,D
NEW QUESTION # 67
A developer must create an Apex class, contactcontroller, that a Lightning component can use to search for Contact records. User of the Lightning component should only be able to search Contact records to which they have access. Which two will restrict the records correctly?
- A. public with sharing class ContactController
- B. public without sharing class ContactController
- C. public inherited sharing class ContactController
- D. public class ContactController
Answer: A,C
NEW QUESTION # 68
Which two statement can a developer use to throw a custom exception of type MissingFieldValueException?Choose 2 answers
- A. Throw (MissingFieldValueException,'Problem occurred');
- B. Throw Exception(new MissingFieldValueException());
- C. Throw new MissingFieldValueException('Problem occurred');
- D. Throw new MissingFieldValueException();
Answer: C,D
NEW QUESTION # 69
Which two statements can a developer use to throw a custom exception of type MissingFieldValueException? Choose 2 answers.
- A. Throw (MissingFieldValueException, 'Problem occurred');
- B. Throw new MissingFieldValueException ('Problem occurred');
- C. Throw Exception (new MissingFieldValueException());
- D. Throw new MissingFieldValueException();
Answer: B,D
NEW QUESTION # 70
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