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  1. Home
  2. Salesforce Certification
  3. DEX-450 Exam
  4. Salesforce.DEX-450.v2026-06-04.q112 Dumps
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Question 26

Which code in a Visualforce page and/or controller might present a security vulnerability?

Correct Answer: B
insert code

Question 27

Which three resources in an Aura component can contain JavaScript functions? Choose 3 answers

Correct Answer: A,B,D
In an Aura component, JavaScript functions can be included in the following resources:
Controller (.js file):
Handles events triggered by user interaction or component lifecycle.
Contains action handlers defined in the component's markup.
"A client-side controller contains the handler functions that are called in response to events fired by the component or other components."
- Aura Components Developer Guide: Client-Side Controller
Helper (.js file):
Contains reusable functions that can be called from the controller or renderer.
Helps to keep the controller lean by abstracting complex logic.
"A helper JavaScript resource can be added to an Aura component bundle and is used to store helper functions that can be reused in the component's client-side code."
- Aura Components Developer Guide: Helper Functions
Renderer (.js file):
Allows for custom rendering behavior.
Contains methods that can override default rendering lifecycle events.
"A renderer component bundle resource allows you to customize the rendering behavior of a component."
- Aura Components Developer Guide: Custom Renderers
Why Other Options Are Incorrect:
C . Style:
The .css file in an Aura component is used for styling and cannot contain JavaScript functions.
"An Aura component or application can have a style (CSS) resource to define its styles."
- Aura Components Developer Guide: Style
E . Design:
The .design file is used to define metadata values for the component, especially when used in Lightning App Builder or Community Builder.
"A design resource describes the design-time behavior of an Aura component-information that visual tools need to display the component in a page or app."
- Aura Components Developer Guide: Design Files
Conclusion: JavaScript functions in an Aura component can be placed in the Controller, Helper, and Renderer resources. Therefore, the correct answers are A, B, and D.
insert code

Question 28

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 clicks a button called Next in the child component, the parent component must be alerted so it can navigate to the next page.
How should this be accomplished?

Correct Answer: B
insert code

Question 29

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?

Correct Answer: B
insert code

Question 30

The values 'High', 'Medium', and 'Low' are Identified as common values for multiple picklist across different object. What is an approach a developer can take to streamline maintenance of the picklist and their values, while also restricting the values to the ones mentioned above?

Correct Answer: C
insert code
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