Top Salesforce Lightning Interview Questions (2024)
What is Salesforce Lightning?
What are the key components of Salesforce Lightning?
Explain the role of Lightning App Builder in Lightning Communities?
How to create a Lightning Component?
Explain the role of the Lightning Component Bundle?
What are Lightning Components Bundles?
What is the Lightning Design System?
Explain the difference between Lightning Components and Visualforce Pages?
What is a Lightning Event?
Explain the difference between Application Events and Component Events?
What is the Lightning App Builder?
What is Lightning Record Page?
How to create a Lightning Record Page?
Explain the purpose of Lightning Data Service?
How to handle errors in Lightning Components?
Explain the role of the Lightning App Builder in mobile development?
What is Lightning Flow?
How to deploy Lightning Components?
What is the difference between Lightning Web Components (LWC) and Aura Components?
How can you optimize performance in Lightning Components?
Q: What is Salesforce Lightning?
Ans:
Salesforce.com offers a component-based application development framework called Salesforce Lightning. It is intended to enhance user experience overall and make operations simpler for corporate users.
Q: What are the key components of Salesforce Lightning?
Ans:
The essential elements consist of:
- Lightning Design System
- Lightning App Builder
- Lightning Components
- Lightning Experience
Q: Explain the role of Lightning App Builder in Lightning Communities?
Ans:
Custom pages in Lightning Communities are created with the Lightning App Builder. Community builders can use a point-and-click interface to create and modify pages.
Q: How to create a Lightning Component?
Ans:
Salesforce CLI (Command-Line Interface) or Developer Console can be used to construct Lightning Components. JavaScript (controller) and markup (component markup) are used to define components.
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Q: Explain the role of the Lightning Component Bundle?
Ans:
A group of files that define a component is called a Lightning Component Bundle. It consists of a helper file, a style file (CSS), a markup file, and a controller file (JavaScript).
Q: What are Lightning Components Bundles?
Ans:
The Lightning component's metadata, CSS, and JavaScript are defined. They make development and deployment easier by being bundled into a single package.
Q: What is the Lightning Design System?
Ans:
Salesforce offers a set of CSS styles, standards, and design patterns that are part of the Lightning Design System. It facilitates the creation of a unified and visually engaging user interface by developers.
Q: Explain the difference between Lightning Components and Visualforce Pages?
Ans:
Although Visualforce Pages are a framework for creating web pages within Salesforce, Lightning Components are a modular, reusable portion of an application. The user interface of Lightning Components is more modern and responsive.
Q: What is a Lightning Event?
Ans:
The Lightning framework's components can communicate with one another through Lightning Events. Loose coupling between components is made possible by their ability to publish and subscribe to events.
Q: Explain the difference between Application Events and Component Events?
Ans:
Application Events can be used to communicate between components that are not in the same hierarchy as well as between components that are, whereas Component Events are used for communication inside components that are.
Q: What is the Lightning App Builder?
Ans:
A point-and-click tool called Lightning App Builder makes it simple to design unique pages for the Lightning Experience and the Salesforce mobile app. It enables non-code user customization of the Salesforce user interface.
Q: What is Lightning Record Page?
Ans:
A Lightning Record Page is a page arrangement that specifies the information's content and arrangement on a record page within the Salesforce mobile app and Lightning Experience.
Q: How to create a Lightning Record Page?
Ans:
The Lightning App Builder may be used to construct Lightning Record Pages. For particular record types, users can add components, change the layout, and specify the overall user experience.
Q: Explain the purpose of Lightning Data Service?
Ans:
Components can read, create, and update Salesforce records using Lightning Data Service, a common interface in the Lightning Component framework, without needing to write Apex code.
Q: How to handle errors in Lightning Components?
Ans:
To handle errors in Lightning Components, the JavaScript controller's try-catch blocks can be used. Error messages could be shown to users or logged for troubleshooting purposes.
Q: Explain the role of the Lightning App Builder in mobile development?
Ans:
Custom pages for the Lightning Experience and the Salesforce mobile app can be made with the Lightning App Builder. It enables programmers to create user interfaces that are both mobile-friendly and responsive.
Q: What is Lightning Flow?
Ans:
Salesforce Lightning Flow is a declarative process automation solution that lets users create flows to design and automate complicated business processes.
Q: How to deploy Lightning Components?
Ans:
Users can use Salesforce DX, Salesforce CLI, or Change Sets to deploy Lightning Components. The component bundle files and metadata are part of the deployment.
Q: What is the difference between Lightning Web Components (LWC) and Aura Components?
Ans:
Aura Components was the first framework for creating components for the Lightning Experience, and Lightning Web Components (LWC) is the newest component model from Salesforce, built on web standards.
Q: How can you optimize performance in Lightning Components?
Ans:
Lazy loading for data, utilizing Lightning Data Service, reducing server calls, and improving component rendering are some ways to optimize performance in Lightning Components.