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Salesforce DEX-450: Programmatic Development using Apex and Visualforce in Lightning Experience Exam is an exam that every Salesforce developer should consider taking. It validates their proficiency in developing custom applications using the latest Apex and Visualforce technologies, as well as leveraging the benefits offered by Salesforce Lightning Experience. DEX-450 exam is affordable, and it can be taken either online or in the testing center, making it accessible to anyone who wants to enhance their Salesforce development skills.
The DEX-450 exam is intended for developers who are involved in the design, development, and implementation of custom solutions, as well as those who are responsible for maintaining and enhancing existing applications. DEX-450 exam is suitable for professionals who have a solid background in software development, as well as those who are familiar with the Salesforce platform and its architecture.
NEW QUESTION # 126
What are two benefits of using declarative customizations over code?
Choose 2 answers
- A. Declarative customizations generally require less maintenance.
- B. Declarative customizations cannot generate run time errors.
- C. Declarative customizations automatically update with each Salesforce release.
- D. Declarative customizations automatically generate test classes.
Answer: A,C
NEW QUESTION # 127
A developer created these three Rollup Summary fields in the custom object, Project_ct,
The developer is asked to create a new field that shows the ratio between rejected and approved timesheets for a given project.
Which should the developer use to Implement the business requirement in order to minimize maintenance overhead?
- A. Apex Trigger
- B. Record-triggered Flow
- C. Formula field
- D. Process Builder
Answer: C
NEW QUESTION # 128
A developer wants to mark each Account in a List<Account> as either or Inactive based on the LastModified field value being more than 90 days.
Which Apex technique should the developer use?
- A. A Switch statement, with a for loop inside
- B. An If/else statement, with a for loop inside
- C. A for loop, with an if/else statement inside
- D. A for loop, with a switch statement inside
Answer: C
NEW QUESTION # 129
What are three ways for a developer to execute tests in an org? Choose 3.
- A. Metadata API.
- B. Tooling API
- C. Salesforce DX
- D. Setup Menu
- E. Bulk API
Answer: B,C,D
Explanation:
https://developer.salesforce.com/docs/atlas.en-us.sfdx_dev.meta/sfdx_dev/sfdx_dev_testing.htm https://developer.salesforce.com/docs/atlas.en-us.api_tooling.meta/api_tooling/tooling_api_objects_apextestsuite.htm
NEW QUESTION # 130
A developer has a single custom controller class that works with a Visualforce Wizard to support creating and editing multiple subjects. The wizard accepts data from user inputs across multiple Visualforce pages and from a parameter on the initial URL.
Which three statements are useful inside the unit test to effectively test the custom controller?
Choose 3 answers
- A. String nextPage - controller.save().getUrl();
- B. Test.setCurrentPage(pageRef);
- C. ApexPages.CurrentPage().getParameters().put('input\', 'TestValue');
- D. insert pageRef.
- E. public ExtendedController(ApexPages StandardController cntrl) { }
Answer: A,B,C
NEW QUESTION # 131
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 cache commonly accessed data for faster retrieval.
- D. To store user generated pictures and Word documents.
Answer: A
NEW QUESTION # 132
A developer has a Visualforce page and custom controller to save Account records. The developer wants to display any validation rule violation to the user. How can the developer make sure that validation rule violations are displayed?
- A. Add cuatom controller attributes to display the message.
- B. Use a try/catch with a custom exception class.
- C. Include <apex:message> on the Visualforce page.
- D. Perform the DML using the Database.upsert() method.
Answer: C
NEW QUESTION # 133
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?
- A. By writing a Before Insert trigger and accessing the field value from Trigger.new
- B. By writing an After Insert trigger and accessing the field value from Trigger.old
- C. By writing, a Before Update trigger and accessing the field value from Trigger.new
- D. By writing an After Update trigger and accessing the field value from Trigger.old
Answer: C
NEW QUESTION # 134
Using the Schema Builder, a developer tries to change the API name of a field that is referenced in an Apex test class.
What is the end result?
- A. The API name of the field and the reference in the test class is changed.
- B. The API name of the field and the reference in the test class is updated.
- C. The API name of the field is changed, and a warning is issued to update the class.
- D. The API name is not changed and there are no other impacts.
Answer: C
NEW QUESTION # 135
Cloud Kicks Fitness, an ISV Salesforce partner, is developing a managed package application. One of the application modules allows the user to calculate body fat using the Apex class, BodyFat, and its method, calculateBodyFat(). The product owner wants to ensure this method is accessible by the consumer of the application when developing customizations outside the ISV's package namespace.
Which approach should a developer take to ensure calculateBodyFat() is accessible outside the package namespace?
- A. Declare the class as global and use the public access modifier on the method.
- B. Declare the class and method using the public access modifier.
- C. Declare the class as public and use the global access modifier on the method.
- D. Declare the class and method using the global access modifier.
Answer: D
NEW QUESTION # 136
When creating a record with a Quick Action, what is the easiest way to post a feed item?
- A. By selecting create case feed on the new record.
- B. By adding a workflow rule on the new record.
- C. By selecting create feed item on the quick action.
- D. By adding a trigger on the new record.
Answer: C
NEW QUESTION # 137
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. 11, 150
- B. 2, 150
- C. 150, 2
- D. 150, 11
Answer: B
NEW QUESTION # 138
A developer created an Apex trigger using the Developer Console and now wants to debug codeHow can the developer accomplish this in the Developer Console?
- A. Select the Override Log Triggers checkbox for the trigger
- B. Open the Progress tab in the Developer Console.
- C. Open the logs tab in the Developer Console.
- D. Add the user name in the Log Inspector.
Answer: C
NEW QUESTION # 139
Which two are best practices when it comes to component and application event handling? Choose 2 answers
- A. Handle low-level events in the event handler and re-fire them as higher-level events. (Missed)
- B. Use component events to communicate actions that should be handled at the application level.
- C. Try to use application events as opposed to component events.
- D. Reuse the event logic in a component bundle, by putting the logic in the helper. (Missed)
Answer: A,D
NEW QUESTION # 140
An apex trigger fails because it exceeds governor limits. Which two techniques should a developer use to resolve the problem? Choose 2 answers
- A. Use lists for all DML operations
- B. Use the database class to handle DML operations
- C. Use SOQL aggregate queries to retrieve child records
- D. Use maps to reference related records
Answer: A,D
NEW QUESTION # 141
Given the code below, which three statements can be used to create the controller variable? Public class accountlistcontroller{ public list<account>getaccounts(){ return controller.getrecords(); } } Choose 3 answers
- A. Apexpages.standardcontroller controller= new apexpages.standardcontroller(database.getquerylocator('select id from account'));
- B. Apexpages.standardsetcontroller controller = new apexpages.standardsetcontroller (database.getquerylocator([select id from account]));
- C. Apexpages.standardsetcontroller controller=new apexpages.standardsetcontroller(database.getquerylocator('select id from account'));
- D. Apexpages.standardcontroller controller= new apexpages.standardcontroller([select id from account]);
- E. Apexpages.standardsetcontroller controller = new apexpages.standardsetcontroller (database.query('select id from account'));
Answer: B,D,E
NEW QUESTION # 142
How can a developer warn users of SOQL governor limit violations in a trigger?
- A. Use Limits.getQueries() and display an error message before the number of SOQL queries exceeds the limit.
- B. Use PageReference.setRedirect() to redirect the user to a custom Visualforce page before the number of SOQL queries exceeds the limit.
- C. Use ApexMessage.Message() to display an error message after the number of SOQL queries exceeds the limit.
- D. Use Messaging.SendEmail() to continue the transaction and send an alert to the user after the number of SOQL queries exceeds the limit.
Answer: A
NEW QUESTION # 143
Which two statements are accurate regarding Apex classes and interfaces?
Choose 2 answers
- A. Inner classes are public by default.
- B. A top-level class can only have one inner class level.
- C. Interface methods are public by default.
- D. Classes are final by default.
Answer: B,C
NEW QUESTION # 144
Which two number expressions evaluate correctly? (Choose two.)
- A. Double d = 3.14159;
- B. Decimal d = 3.14159;
- C. Integer I = 3.14159;
- D. Long l = 3.14159;
Answer: A,B
NEW QUESTION # 145
What is the requirement for a class to be used as a custom Visualforce controller?
- A. Any top-level Apex class that implements the controller interface
- B. Any top-level Apex class that has a default, no-argument constructor
- C. Any top-level Apex class that has a constructor that returns a PageReference
- D. Any top-level Apex class that extends a PageReference
Answer: A
NEW QUESTION # 146
What is a benefit of the Lightning Component framework?Choose 3 answers
- A. It uses a traditional publish-subscribe model.
- B. It uses an event-driven architecture
- C. It uses an MVC architectural design pattern.
- D. It uses client-side Apex controllers for logic.
- E. It uses server-side JavaScript controller for logic.
Answer: A,B,C
NEW QUESTION # 147
A developer is debugging the following code to determinate why Accounts are not being created Account a = new Account(Name = 'A'); Database.insert(a, false); How should the code be altered to help debug the issue?
- A. Collect the insert method return value a Saveresult variable
- B. Add a try/catch around the insert method
- C. Set the second insert method parameter to TRUE
- D. Add a System.debug() statement before the insert method
Answer: A
NEW QUESTION # 148
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