9 Important Rest API Interview Questions to Ask in 2023
What is a REST API?
A Representational State Transfer (REST) API is a web service that uses HTTP requests and responses to send and receive data between systems. It is a type of software architecture that enables developers to create web services that can be accessed by a wide range of devices and applications.
What are the benefits of using a REST API?
REST APIs provide several benefits compared to other types of APIs. They are highly scalable, flexible, and secure, making them an excellent choice for many types of applications. Additionally, they are easy to use and require minimal setup and maintenance.
What is the difference between a REST API and a SOAP API?
The main difference between a REST API and a SOAP API is the way in which data is structured. While a SOAP API uses XML as its data format, a REST API uses JSON. Additionally, REST APIs are typically simpler and easier to use than SOAP APIs.
What is the difference between a REST API and a web service?
A web service is an application programming interface (API) that enables data to be exchanged between two or more systems. It is usually used to connect systems that use different technologies. A REST API is a type of web service that uses HTTP requests and responses to send and receive data between systems.
What are the most common HTTP methods used in a REST API?
The most common HTTP methods used in a REST API are GET, POST, PUT, PATCH, and DELETE. Each of these methods has a specific purpose and is used to send and receive data between systems.
What is JSON and how is it used in a REST API?
JSON (JavaScript Object Notation) is a data format that is used to send and receive data between systems. It is a lightweight and easy-to-use format that is often used in REST APIs.
What are the differences between a REST API and a GraphQL API?
GraphQL is a query language that enables developers to interact with data in a more efficient and flexible way than with a REST API. It allows developers to specify exactly what data they need, which can help reduce the amount of data that is sent and received. Additionally, GraphQL can be used to make requests to multiple data sources at once.
What is the best way to secure a REST API?
The best way to secure a REST API is to use authentication and authorization. Authentication ensures that only authorized users can access the API, while authorization ensures that users only have access to the data that they are authorized to access. Additionally, it is important to use HTTPS for all requests and responses, as well as to use encryption for sensitive data.
What is the best way to version a REST API?
The best way to version a REST API is to use a versioning system such as Semantic Versioning. This system provides a consistent way to identify changes to the API and allows developers to easily identify which version of the API they are using. Additionally, it is important to document the changes that are made to the API so that developers can easily identify and use the correct version.