Question 1

What are the key differences between REST and SOAP APIs in Salesforce?

Accepted Answer

REST is lightweight and uses JSON, making it ideal for mobile/web apps. SOAP is more structured and supports complex operations and WS-Security.

Question 2

Explain OAuth 2.0 flow in Salesforce integrations.

Accepted Answer

OAuth 2.0 allows secure access to Salesforce APIs using token-based authentication. Common flows include Web Server, Username-Password, and JWT Bearer.

Question 3

What are common middleware tools used for Salesforce integration?

Accepted Answer

MuleSoft, Dell Boomi, Jitterbit, and Informatica are widely used. They help manage ETL, transformations, and data sync between systems.

Question 4

How does Salesforce support real-time integration?

Accepted Answer

Using Outbound Messages, Platform Events, Streaming API, and Change Data Capture to push data to external systems instantly.

Question 5

How do you handle errors in Salesforce integrations?

Accepted Answer

Use try-catch in Apex, monitor debug logs, handle API status codes, and set retry logic in middleware tools.

Question 6

What is the difference between synchronous and asynchronous callouts?

Accepted Answer

Synchronous callouts block the execution until a response is received. Asynchronous callouts (e.g., @future, Queueable) run in the background without blocking.

Question 7

Explain the Bulk API and when to use it.

Accepted Answer

Bulk API is designed for processing large data volumes (up to millions of records) asynchronously. It uses batch processing and supports CSV/JSON.

Question 8

What is the Metadata API used for?

Accepted Answer

Metadata API is used to retrieve, deploy, and manage metadata (custom objects, fields, layouts) in Salesforce. It's key for CI/CD and automation.

Question 9

What are named credentials in Salesforce?

Accepted Answer

Named credentials simplify authentication by storing endpoint URLs and authentication details (OAuth, username/password) for external services.

Question 10

What is the difference between OAuth 2.0 and JWT Bearer flow?

Accepted Answer

JWT Bearer flow uses a signed JWT to obtain an access token without user interaction, suitable for server-to-server integrations.

Salesforce Integration Interview Questions & Answers

What are the key differences between REST and SOAP APIs in Salesforce?

Explain OAuth 2.0 flow in Salesforce integrations.

What are common middleware tools used for Salesforce integration?

How does Salesforce support real-time integration?

How do you handle errors in Salesforce integrations?

What is the difference between synchronous and asynchronous callouts?

Explain the Bulk API and when to use it.

What is the Metadata API used for?

What are named credentials in Salesforce?

What is the difference between OAuth 2.0 and JWT Bearer flow?

What are the key components of OAuth 2.0 in Salesforce?

Explain how to secure API endpoints with session-based vs. token-based auth.

What is the role of MuleSoft Anypoint Platform in Salesforce integrations?

How does Salesforce Connect work?

What is Change Data Capture (CDC) and how does it differ from Platform Events?

What is Streaming API and its use cases?

Explain how to set up a real-time integration using Platform Events.

What are the common HTTP status codes you handle in integration?

How do you implement retry logic in Apex callouts?

How do you monitor integration failures in production?

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