Interview

20 Salesforce REST API Interview Questions and Answers

Prepare for the types of questions you are likely to be asked when interviewing for a position where Salesforce REST API will be used.

The Salesforce REST API gives developers access to Salesforce data and functionality from any external system. This makes it a powerful tool for building integrations with Salesforce. If you’re applying for a position that involves working with the Salesforce REST API, you’ll need to be prepared to answer questions about it. In this article, we review some of the most common Salesforce REST API interview questions and how to answer them.

Salesforce REST API Interview Questions and Answers

Here are 20 commonly asked Salesforce REST API interview questions and answers to prepare you for your interview:

1. What is the REST API in Salesforce?

The REST API in Salesforce is a platform that allows developers to create applications that can interact with Salesforce data and services. The REST API provides a way to access Salesforce data and functionality from outside of the Salesforce platform.

2. Can you explain the different types of APIs that are supported by Salesforce?

There are three different types of APIs that are supported by Salesforce: SOAP, REST, and Bulk. SOAP is the oldest and most well-established of the three, and is used for accessing data and performing actions on Salesforce objects. REST is newer and provides a more lightweight interface for working with Salesforce data. Bulk is designed for handling large amounts of data, and is often used for data import and export.

3. How do you generate an access token for authentication with the Salesforce REST API?

You need to generate a consumer key and secret from your Salesforce org, and then use those to request an access token from Salesforce.

4. Why is it important to use a security token when using the Salesforce REST API? When should we use one?

A security token is important to use when accessing the Salesforce REST API because it helps to ensure that only authorized users are able to access data. A security token should be used any time sensitive data is being accessed, such as when a user is logging in or when data is being updated.

5. What’s the difference between SOAP and REST in terms of their usage with Salesforce?

SOAP is a protocol that uses XML to exchange information, while REST is an architectural style that uses HTTP to access data. SOAP is more heavyweight and requires more setup than REST, but it also offers more features and is better suited for complex applications. REST is simpler and easier to use, but it is less powerful than SOAP.

6. Is it possible to call the Force.com Web Services from a .NET client application? If yes, then how?

Yes, it is possible to call the Force.com Web Services from a .NET client application. To do so, you will need to use the Force.com Toolkit for .NET. This toolkit provides a set of classes that makes it easy to call the Force.com Web Services from a .NET application.

7. What is HTTP POST used for?

HTTP POST is used to create a new record in Salesforce.

8. What’s the purpose of annotations like @RestResource in Apex?

The @RestResource annotation is used to expose Apex classes and methods as REST web services. By annotating a class with @RestResource, you make the class accessible via the Salesforce REST API. The @HttpGet, @HttpPost, @HttpPut, and @HttpDelete annotations are used to set the HTTP method that the web service will respond to.

9. What’s the importance of @HttpGet, @HttpPost, @HttPatch annotations in context with Salesforce?

The @HttpGet, @HttpPost, and @HttpPatch annotations are important because they allow you to specify which HTTP method should be used when accessing a particular Salesforce API endpoint. For example, if you want to use the Salesforce REST API to create a new record, you would use the @HttpPost annotation. If you want to update an existing record, you would use the @HttpPatch annotation.

10. What is the default timeout period for an HTTP request made through the REST API in Salesforce?

The default timeout period for an HTTP request made through the REST API in Salesforce is 120 seconds. This means that if a request takes longer than 120 seconds to complete, it will be automatically timed out by Salesforce.

11. Are there any restrictions on using the @RestResource annotation?

Yes, there are a few restrictions to be aware of when using the @RestResource annotation. First, the class must be annotated with @RestResource and it must be a public class. Additionally, the class must be a top-level class, meaning it cannot be nested within another class. Finally, the class cannot be an inner class.

12. What is the maximum size of data that can be sent or received via REST calls in Salesforce?

The maximum size of data that can be sent or received via REST calls in Salesforce is 10 MB.

13. How many custom objects can be created in Salesforce?

There is no limit to the number of custom objects that can be created in Salesforce.

14. What are the limitations associated with making outbound calls in Salesforce?

The limitations associated with making outbound calls in Salesforce are that you can only make a certain number of calls per day, and that each call can only last for a certain amount of time.

15. What is the best way to debug issues related to REST API requests in Salesforce?

The best way to debug issues related to REST API requests in Salesforce is to use the Salesforce Developer Console. This tool will allow you to see the details of each request and response, which can be helpful in troubleshooting any issues that may arise.

16. What does the term “id” mean in the context of the Salesforce REST API?

The id field in the Salesforce REST API refers to the unique identifier for a given record. This id can be used to fetch a specific record from Salesforce, or to update or delete that record.

17. What is the URL format for accessing records in Salesforce through the REST API?

The URL format for accessing records in Salesforce through the REST API is as follows:

https://{instance}.salesforce.com/services/data/v{version}/sobjects/{object}/{id}

For example, if you wanted to access a record with an ID of 001D000000KjT9u in Salesforce, the URL would be as follows:

https://na1.salesforce.com/services/data/v20.0/sobjects/Account/001D000000KjT9u

18. What is the format used for sending responses from the Salesforce REST API?

The Salesforce REST API uses JSON format for responses.

19. What is pagination in the context of the Salesforce REST API?

Pagination is a way of handling large result sets from the Salesforce REST API by breaking them up into smaller chunks, or pages. This allows for better performance and more manageable data sets. To implement pagination, you will need to use the limit and offset parameters in your REST API calls. The limit parameter specifies the maximum number of records to be returned in a single call, while the offset parameter specifies the starting point for the returned records.

20. What is the syntax used to create new records in Salesforce via the REST API?

The syntax for creating new records in Salesforce via the REST API is as follows:

POST /services/data/vXX.X/sobjects/SOBJECT

{
“FIELD1”: “VALUE1”,
“FIELD2”: “VALUE2”,

}

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