18Software Engineering · Interview Prep · Free
Salesforce Developer interview questions — and how to answer them.
These are the questions Salesforce Developer candidates are most likely to face, from openers to the hard ones — each with a note on what a strong answer covers. Want more, tuned to your level? Use the free generator below.
What interviewers look for in a Salesforce Developer
- Concrete examples of systems you've built, with the trade-offs you weighed
- How you debug — the process, not just the fix
- Collaboration signals: code review, disagreements, mentoring
Likely Salesforce Developer interview questions
1. Can you explain your experience with Salesforce and which cloud services you've worked with?
Mention specific clouds (Sales, Service, Commerce) and years of hands-on experience with declarative/programmatic tools.
2. What is the difference between a trigger and a process builder in Salesforce?
Explain use cases for each, performance implications, and when you'd choose one over the other.
3. Describe a time when you had to debug a complex issue in Salesforce. How did you approach it?
Walk through your debugging methodology: logs, breakpoints, governor limits, and how you communicated findings.
4. What are Salesforce governor limits and why are they important?
Discuss common limits (API calls, batch size, query rows), their purpose, and strategies to avoid hitting them.
5. How would you design a custom solution to sync data between Salesforce and an external system?
Cover API selection, batch vs. real-time, error handling, monitoring, and whether you'd use middleware or native tools.
6. Tell me about your experience with Apex. What's the difference between a List and a Set?
Explain memory efficiency, performance trade-offs, and demonstrate knowledge of Apex collections and iteration.
7. How do you ensure your Salesforce code is testable, and what's your approach to unit testing?
Discuss test coverage requirements (75%), mocking, test data setup, assertion strategies, and CI/CD integration.
8. Describe your experience with SOQL and SOSL queries. How do you optimize them?
Address query performance, selective filtering, avoiding nested loops, bulk operations, and query plan tool usage.
9. Walk me through how you would implement a multi-step approval process in Salesforce.
Consider using Approval Process, Flows, or custom code; explain security, notifications, and scalability trade-offs.
10. How have you used Salesforce Lightning Web Components (LWC) or Aura in a production project?
Discuss component lifecycle, state management, events, reusability, performance optimization, and when to use each framework.
11. Explain a scenario where you refactored legacy Salesforce code. What challenges did you face?
Highlight technical debt, testing strategy, backward compatibility, stakeholder communication, and measurable improvements.
12. How would you architect a large-scale data migration into Salesforce, and what risks would you mitigate?
Cover data mapping, validation rules, duplicate handling, rollback strategy, performance tuning, and post-migration verification.
Want to practice answering live with scored feedback? Try the Mock Interview Coach.
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