Salesforce Lightning is more than just a new UI—it’s a robust framework that drives modern CRM experiences. Whether you’re an aspiring admin, developer, or consultant, understanding Lightning is essential for standing out in today’s Salesforce job market.
Let’s dive into the top 5 Salesforce Lightning interview questions and expert answers to help you prepare and shine in your next interview.
🥇 1. What is Salesforce Lightning, and how does it differ from Salesforce Classic?
Why It’s Asked:
To test your foundational knowledge of Lightning’s advantages.
Answer:
Salesforce Lightning is a component-based framework that delivers a faster, modern UI and enhanced flexibility. Compared to Classic:
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UI: Lightning uses a dynamic, drag-and-drop interface.
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Performance: Lightning is optimized for mobile and faster rendering.
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Customization: Lightning App Builder allows rich custom apps without code.
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Components: Lightning uses LWC and Aura; Classic depends on Visualforce.
🎯 Tip: Share real-world scenarios where Lightning provided a better user experience.
🧱 2. What are Lightning Web Components (LWC), and how do they differ from Aura Components?
Why It’s Asked:
To evaluate your technical expertise with modern Lightning architecture.
Answer:
LWC is a lightweight framework based on modern web standards (HTML, JavaScript, CSS), whereas Aura is Salesforce’s older proprietary model.
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Performance: LWC uses native browser APIs, so it’s faster.
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Syntax: LWC is JavaScript-friendly and easier to learn for web developers.
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Reuse: LWC components can extend beyond Salesforce.
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Development Speed: Faster with built-in tools and testing.
💡 Mention if you’ve migrated from Aura to LWC and what benefits you observed.
🧰 3. What is the Lightning App Builder, and how does it enhance application development?
Why It’s Asked:
To assess your ability to use no-code/low-code tools effectively.
Answer:
Lightning App Builder is a visual tool that enables users to design responsive pages by dragging and dropping components. Features include:
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Custom & standard components
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Dynamic visibility rules
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Integration with external systems
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Mobile-optimized layouts
🧠 Talk about a use case where you built a custom Lightning page using App Builder to streamline user workflows.
🔐 4. How do you handle security and data access in Salesforce Lightning?
Why It’s Asked:
Because secure data handling is a core skill in Salesforce development.
Answer:
Security is enforced through:
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Field-Level Security: Restricts access to sensitive fields.
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Object & Record-Level Security: Managed via profiles, permission sets, and sharing rules.
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Lightning Locker: Prevents cross-component attacks.
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Lightning Data Service: Ensures secure, declarative data access.
💬 Share how you’ve used these layers to protect data in a real-world app.
⚡ 5. What are Lightning Actions, and how do they improve user efficiency?
Why It’s Asked:
To see how you apply Lightning’s customization options to enhance productivity.
Answer:
Lightning Actions let users perform contextual tasks with fewer clicks:
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Standard Actions: Edit, Delete, Clone
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Quick Actions: Custom flows or component launches
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Global Actions: Accessible across objects
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Object-Specific: Contextual to the current record
🔄 Share an example of using a custom Quick Action to reduce repetitive manual tasks.
📌 Conclusion
Mastering these top Salesforce Lightning interview questions gives you a huge advantage. From understanding LWC vs. Aura to building secure, efficient, and user-friendly apps, your ability to articulate these answers can set you apart.
Stay sharp, keep practicing, and remember—Salesforce continues to evolve, so always be learning.
💬 FAQs
Q: Should I learn Aura if I already know LWC?
Aura is still in use in many orgs, so knowing the basics helps in legacy projects.
Q: Can admins use Lightning too?
Absolutely! Tools like App Builder and Quick Actions are admin-friendly and powerful.
Q: Do companies prefer LWC over Aura now?
Yes—LWC is the standard for new development due to performance and maintainability.
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