Exercises
Challenge your understanding of API creation in backend development. This quiz covers the foundations of application programming interfaces, including RESTful architecture, HTTP methods, status codes, stateless communication, idempotent operations, and common data formats such as JSON. You will also explore essential API concepts like CORS, API gateways, versioning, OAuth authentication, GraphQL, and tools used for API testing. Whether you are learning backend development or reviewing for a technical interview, these questions will help you assess your knowledge of designing, building, securing, and maintaining modern web APIs.
Answer the questions below and check the explanation for each answer.
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An API is a set of protocols and tools for building software applications, allowing different services to communicate with each other.
The POST method is used to create a new resource on the server.
REST stands for Representational State Transfer, a set of principles for designing networked applications.
The 200 status code indicates that the HTTP request was successful.
An API gateway serves as an entry point for all client requests, providing routing, authentication, and other services.
JSON is a common format used by APIs for data exchange due to its simplicity and readability.
CORS stands for Cross-Origin Resource Sharing, a mechanism allowing controlled access to resources on different domains.
The PUT operation is idempotent, meaning multiple identical requests will have the same effect as a single request.
API versioning allows developers to manage changes over time while maintaining backward compatibility.
GraphQL is a query language for APIs designed to allow clients to request exactly what they need.
Postman is a popular tool used by developers to test and interact with APIs.
OAuth is used for authorization and authentication, allowing applications to access user information without sharing passwords.
Statelessness in REST APIs means that each request from a client must contain all the information needed to understand and process the request independently.
REST follows a resource-oriented architectural style, focusing on resources represented as URIs.
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