Salesforce Developer interview questions focus on your knowledge of Salesforce platform, Apex programming, Visualforce, Lightning components, integrations, and customization. Below are 25 commonly asked Salesforce Developer interview questions with clear answers to help you prepare.
Q1. What is Salesforce?
Salesforce is a cloud-based Customer Relationship Management (CRM) platform that helps businesses manage sales, service, marketing, and more.
Q2. What is Apex in Salesforce?
Apex is a strongly typed, object-oriented programming language used to develop custom business logic on the Salesforce platform.
Q3. What are governor limits in Salesforce?
Governor limits are runtime limits enforced by Salesforce to ensure efficient resource usage and prevent abuse in a multi-tenant environment.
Q4. What is a trigger in Salesforce?
A trigger is Apex code that executes before or after data manipulation language (DML) operations like insert, update, or delete on Salesforce records.
Q5. Explain the difference between before and after triggers.
Before triggers execute before data is saved to the database, useful for validation or modification. After triggers execute after data is saved, used for actions that depend on record IDs or related records.
Q6. What is Visualforce?
Visualforce is a markup language that allows developers to build custom user interfaces on the Salesforce platform.
Q7. What is a Lightning Component?
Lightning Components are reusable UI building blocks based on the Aura framework used to create dynamic web apps for Salesforce.
Q8. How do you handle exceptions in Apex?
Using try-catch blocks to catch exceptions and handle errors gracefully.
Q9. What is SOQL?
Salesforce Object Query Language (SOQL) is used to query data from Salesforce objects similar to SQL.
Q10. What is the difference between SOQL and SOSL?
SOQL retrieves records from one object at a time based on criteria; SOSL can search text, email, and phone fields across multiple objects.
Q11. What are custom settings?
Custom settings are similar to custom objects that store application data and can be used in Apex code for configuration.
Q12. What is a batch Apex?
Batch Apex allows processing of large volumes of data asynchronously in manageable chunks to avoid governor limits.
Q13. How can you improve Salesforce governor limits?
By bulkifying code, using efficient SOQL queries, avoiding loops inside queries, and using batch Apex or queueable Apex.
Q14. What is a Visualforce controller?
A controller is an Apex class that provides data and logic to Visualforce pages.
Q15. What are triggers used for in Salesforce?
Triggers automate tasks and business processes based on record changes such as insertions, updates, or deletions.
Q16. What is a workflow in Salesforce?
Workflows automate standard internal procedures and processes like sending emails, updating fields, or creating tasks.
Q17. What is a junction object?
A junction object is a custom object with two master-detail relationships used to create many-to-many relationships between objects.
Q18. What are Governor Limits specific to Apex?
Limits include maximum CPU time, SOQL queries per transaction, DML statements, heap size, and callouts, among others.
Q19. How do you debug Apex code?
Using debug logs, Developer Console, and System.debug statements.
Q20. What is the difference between a role and a profile?
Roles control record-level access in the hierarchy; profiles control object-level and field-level permissions.
Q21. Explain dynamic Apex.
Dynamic Apex allows writing flexible code that can manipulate objects and fields at runtime.
Q22. What is SOQL injection and how can you prevent it?
SOQL injection is a security vulnerability where user input modifies SOQL queries; prevent by using bind variables and input validation.
Q23. What is the use of the “with sharing” keyword?
It enforces sharing rules for the current user when running Apex code.
Q24. What is a Lightning Web Component?
A modern framework for building Lightning components using web standards like ES6 and Custom Elements.
Q25. What are some common integration methods in Salesforce?
REST API, SOAP API, Bulk API, Streaming API, and outbound messaging.