Salesforce developer interview questions for an experienced candidate

 Here are some Salesforce developer interview questions for an experienced candidate:

Technical Knowledge and Skills

1. Apex and Triggers:

   • Explain the Apex Trigger Handler pattern and its benefits.
   • How do you handle bulk operations in Apex triggers?
   • Describe a scenario where you used a trigger to solve a business problem.

2. Visualforce and Lightning Components:

   • What are the differences between Visualforce and Lightning components?
   • Explain the process of migrating a Visualforce page to a Lightning component.
   • How do you handle communication between Lightning components?

3. Salesforce Integration:

   • Describe how you would integrate Salesforce with an external system.
   • What are the different methods for integrating with external systems (e.g., REST API, SOAP API)?
   • Can you explain the use of Named Credentials in Salesforce?

4. Salesforce Security:

   • How do you implement field-level security in Salesforce?
   • What are sharing rules and how do they differ from roles and profiles?
   • How would you ensure data security while integrating with an external system?

5. Salesforce Deployment:

   • What tools do you use for deploying code and configuration changes in Salesforce?
   • Explain the Salesforce deployment process using Change Sets.
   • How do you handle deployment errors and rollback strategies?

Scenario-Based Questions

6. Problem Solving:

   • You need to automate a complex business process that requires approval from multiple levels of management. How would you implement this in Salesforce?
   • A user reports that a certain field is not updating as expected after a trigger is executed. How would you troubleshoot this issue?

7. Best Practices:

   • Describe your approach to writing test classes in Salesforce. How do you ensure high test coverage and quality?
   • How do you handle governor limits in Salesforce?
   • What are some best practices for designing scalable and maintainable Salesforce applications?

Advanced Topics

8. Advanced Apex:

   • Explain the concept of Apex Batch Processing and its use cases.
   • What is Apex Managed Sharing and when would you use it?
   • Describe how you would use Queueable Apex and its advantages over Future methods.

9. Lightning Web Components (LWC):

   • What are Lightning Web Components and how do they differ from Aura components?
   • Describe the lifecycle of a Lightning Web Component.
   • How do you handle state management in LWCs?

Behavioral and Experience-Based Questions

10. Experience:
    • Can you describe a challenging Salesforce project you worked on and how you overcame the challenges?
    • How do you stay updated with the latest Salesforce features and best practices?
    • Describe a time when you had to work with cross-functional teams to deliver a Salesforce solution.

These questions cover a range of topics and are designed to assess both technical expertise and practical experience in Salesforce development.

How do you use Lightning Aura components to interact with Apex classes?

To use Lightning Aura components to interact with Apex classes, you can use the @AuraEnabled annotation in your Apex class to expose the class and its methods to Lightning Aura components. You can then use the Lightning Aura component's JavaScript controller to call the Apex class method using the Lightning Data Service (LDS) or the Lightning Component Library (LCL).

Here is an example of an Apex class with an @AuraEnabled method:

public with sharing class MyApexClass {

    @AuraEnabled

    public static String getMessage() {

        return 'Hello from Apex';

    }

}

And here is an example of a Lightning Aura component that calls the Apex class method using LDS:

<!-- myComponent.cmp -->

<aura:component>

    <aura:attribute name="message" type="String" />

    <lightning:button label="Get Message" onclick="{! c.getMessage }" />

    <br />

    <p>{! v.message }</p>

</aura:component>

// myComponentController.js

({

    getMessage: function(component, event, helper) {

        // Call the Apex class method

        var action = component.get('c.getMessage');

        // Set the callback function

        action.setCallback(this, function(response) {

            var state = response.getState();

            if (state === 'SUCCESS') {

                // Set the component attribute with the returned value

                component.set('v.message', response.getReturnValue());

            } else {

                console.log('Error: ' + state);

            }

        });

        // Send the request to the server

        $A.enqueueAction(action);

    }

})

I hope this helps!