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Salesforce Lightning Interview Questions and Answers



In this post, You will find all the important Salesforce Lightning Interview Questions and answers. All these questions are prepared by our Salesforce experts with the latest topics and definitely will help you to crack the interview and help you to get your dream to become and Salesforce lightning developer. In case if you are looking for an answer to any other questions, Add your question in the comments section given at the end of this post.

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Salesforce Lightning Interview Questions

What is Lightning?

Here Lightning is the upgraded version of Salesforce in which all the tools and technologies are new and in the latest version. Following are the components available in Lightning;

Salesforce Lightning Interview Questions and Answers
Lightning Component Framework
Visual Building Tools
Lightning Exchange
Lightning Design System

How can Lightning Components be used with the Salesforce1 Mobile App?

Best Question for Salesforce Lightning Interview Questions. Lightning components can be used with Salesforce1 Mobile App by creating a custom Lightning tab which points to our component and includes that tab in our Salesforce1 Mobile navigation.

Can a Lightning Component which shows up in both the Mobile and the Desktop User Interfaces be made?

In Salesforce Lightning Experience the Lightning Components can be used directly used, also can be used in the Salesforce1 Mobile app, template-based communities, and other standalone apps. Additionally, it also includes Lightning components in a Visual Force Page, which allows us to use them in Salesforce Classic, Visual force-based communities and Console. This is also a good Question for Salesforce Lightning Interview Questions and Answers

Do you think Lightning is an MVC Framework?

Salesforce Lightning is a component-based framework.

Which parts of the Lightning Components are server-side and which are on the client-side?

The JavaScript used on the client-side and Apex on the server-side in Salesforce lightning.

What is the type of different events into Salesforce Lightning Component?

  • Application Event
  • System Event
  • Component Event

What is the difference between the component event and the application event?

Component Events Application Events
1. These are used when the parent and child need to communicate.
2. They make use of bubbling and capture, just like it is used in DOM events.
3. Any change in child component will be communicated to the parent component through this component event.
1. Used for communicating any kind of change in the component to a larger audience.
2. Any component which has been registered for this event will get notified.

When should component events and application events be used?

This is also a good Question for Salesforce Lightning Interview Questions.

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Component EventsApplication Events
1. Component events can be handled only by the components which are above them in the hierarchy of containment.
2. The usage of component event is limited to the components which need to know them.
1. Application events are used when something is handled at the application level, like navigating to a particular record.
2. Application events helps in the communication between the components available in the separate parts of the application.
3. Also help in the component communication if they have no direct containment relationship.

Which interface is often used for implementation so that a lightning component can be used for quick action?

Implementation can be done with the following the “force: lightningQuickAction” so that the component can be used for quick action.

How can a Lightning component be used in a Visualforce page?

Using Lightning out, A Lightning Component can be embedded in any kind of webpage and the feature is very flexible. The level of flexibilty is little down In Visualforce. Lightning Component can be used in the Visualforce page in three steps:

  • A Lightning app has to be created and referred to in component dependencies.
  • Add the Lightning Components for Visualforce JavaScript library for the targeted page of Visualforce using the tag.
  • Finally, a JavaScript Function needs to be written which will ultimately create the component on the page by making use of $Lightning.createComponentt()

Name a few different Lightning Component bundles?

Lightning Component bundles in salesforce;

  • Component
  • Controller
  • Helper
  • Style
  • Document
  • Design
  • SVG
  • Renderer

How can FLS be ensured while working on the Lightning Component?

This is also a good Question for Salesforce Lightning Interview Questions. FLS and CRUD can be manually enforced in the Apex Controller, or it can be enforced using the Lightning Data service where it required because it handles both the FLS and CRUD. Both of them are not enforced automatically in case any object is referenced in the Apex Controller.

How can Lightning Components be used in the Salesforce1 Mobile App?

A new lightning tab can be created and that can be included in the salesforce1 Mobile Navigation select list and the newly created tab for it.

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Is it possible to make a Lightning Component that shows up in the mobile and the desktop user interfaces?

Salesforce Lightning Component refers to a lightning experience that is ready by default and also has compatibility in Salesforce1 App. The layout of the salesforce lightning is responsive and it adjusts the resolution as per the screen size. Hence, it can be used on a desktop and without any separate code.

What is the limit on the number of components which can be included in one Application?

There is no upper limit in the number of components that can be included in one app.

What do you mean by Aura?

This is also a good Question for Salesforce Lightning Interview Questions and Answers. Basically Aura is a User Interface framework that is used by developers for the development of dynamic web apps for both mobile and desktop devices. Aura provides scalable lifecycle support to the apps building. Aura backs the partitioned multi-tier component development which bridges the client and the server. In this process Java is used on the server-side while JavaScript is used on the client-side.

Do you think a namespace is used for the development of Lightning Components?

No, the namespace is not essential for lightning component development.

What is the underlying difference between Visualforce Component and the Lightning Component?

Visualforce Component Lightning Component?
Visualforce page is created by keeping it at the center of the application The lightning component, on the other hand, is created by making use of the component-based framework
Most of its calculation is taken up at the server-side. Most of the calculations are performed at the side of the client
It gives a more dynamic and rich customer experience. The lightning component is built using the mobile-first approach.

Are there any CSS styles provided by the which support the Lightning components?

Salesforce has given the lightning design system as the default CSS that can be used with the Lightning component.

Do you think Lightning Components are only directed towards mobile apps?

Salesforce Lightning Components are designed with a mobile-first approach, but its responsive nature allows it to give the same experience even over the desktop and mobile without writing any separate lines of code.

Mention any advantages of lightning?

Lightning has many advantages like an extraordinary component set which lets;

  • Fast creation of new apps,
  • Easy decoupling between the components can be enabled by the event-driven architecture.
  • It is endowed with device awareness, cross-browser compatibility, and an optimized framework for performance.

Is it possible to integrate Lightning components with another framework like Angular?

Yes, this can be integrated with any of the third-party framework like Angular or React.

Where can the lightning component be displayed?

These components can be displayed in the following areas;

  • Lightning Experience
  • Salesforce1 Mobile App
  • Community Based on Templates
  • VisualForce Page
  • Standalone Lightning App

How can components be deployed to the production org?

These components can be deployed to the production by;

  • change sets,
  • IDE, and
  • Managed Package.

Overall Conclusion

Salesforce Lightning is designed to make the process simple, anyone who don’t have programming skills cab use it easily. In future, lightning has a huge career scope.

Here we provide you some important interview questions for Salesforce Lightning Interview Questions and Answers these will help you in the preparation needs to be done with a lot of care and seriousness. There are many aspects which have to be touched. The questions mentioned above if done properly will definitely give you an edge over other participants.

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