Free DEX-450 Questions for Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience DEX-450 Exam as PDF & Practice Test Engine

Since Aura application events follow the traditional publish-subscribe model, which method is used to fire an event?

While writing an Apex class, a developer wants to make sure that all functionality being developed is handled as specified by the requirements.
Which approach should the developer use to be sure that the Apex class is working according to specifications?

Which scenario is valid for execution by unit tests?

Universal Containers (UC) is developing a process for their sales teams that requires all sales reps to go through a set of scripted steps with each new customer they create.
In the first step of collecting information, UC's ERP system must be checked via a REST endpoint to see if the customer exists. If the customer exists, the data must be presented to the sales rep in Salesforce.
Which two should a developer implement to satisfy the requirements?
Choose 2 answers

Universal Containers wants a list button to display a Visualforce page that allows users to edit multiple records.
Which Visualforce feature supports this requirement?

A developer has a single custom controller class that works with a Visualforce Wizard to support creating and editing multiple sObjects. 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

Which exception type cannot be caught?

A lead developer creates an Apex interface called Laptop. Consider the following code snippet:
public class SilverLaptop{
//code implementation
How can a developer use the Laptop interface within the silverLaptop class?

The Account object in an organization has a master-detail relationship to a child object called Branch. The following automations exist:
* Roll-up summary fields
* Custom validation rules
* Duplicate rules
developer created a trigger on the Account object.
Which two things should the developer consider while testing the trigger code?
Choose 2 answers