API Design Basics Quiz

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| Questions: 15 | Updated: Apr 30, 2026
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1. Which HTTP method is idempotent and safe, used to retrieve a resource without modifying it?

Explanation

GET is an HTTP method that is considered both idempotent and safe because it retrieves data from a server without causing any changes to the resource. This means multiple identical requests will yield the same result without side effects, making it suitable for fetching information without altering the state of the server.

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About This Quiz
API Design Basics Quiz - Quiz

This API Design Basics Quiz evaluates your understanding of core REST principles, HTTP methods, status codes, and architectural patterns essential for building scalable web services. Designed for college-level learners, it covers request\/response handling, authentication, versioning, and rate limiting\u2014key concepts for designing robust APIs. Test your knowledge of industry best practices... see moreand common design decisions. see less

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2. What does REST stand for in API design?

Explanation

REST stands for Representational State Transfer, a software architectural style that defines a set of constraints for creating web services. It emphasizes stateless communication, resource representation, and the use of standard HTTP methods, enabling scalable and efficient interaction between clients and servers in a distributed environment.

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3. Which status code indicates the server successfully created a new resource?

Explanation

The status code 201 Created indicates that the server has successfully fulfilled a request to create a new resource. This response is typically returned after a POST request, confirming that the resource has been created and is now available at the specified location.

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4. API versioning through the URL path (e.g., /v1/users) is preferred over header-based versioning.

Explanation

API versioning through the URL path is preferred because it makes the version explicit and easily accessible, improving clarity for developers and users. This approach allows for straightforward identification of the API version in requests, facilitates caching, and simplifies documentation, making it easier to manage and maintain different versions of the API.

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5. Which authentication method transmits credentials with every request encoded in Base64?

Explanation

Basic Authentication transmits user credentials (username and password) encoded in Base64 with each request. This method is straightforward but lacks security since Base64 encoding is easily reversible, making it vulnerable to interception unless used over HTTPS. It is commonly used in simple API authentication scenarios.

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6. In REST API design, a resource should be identified by a ____.

Explanation

In REST API design, each resource is uniquely identified by a Uniform Resource Identifier (URI). This allows clients to access and manipulate resources through a consistent and standardized way, ensuring that each resource can be distinctly referenced and interacted with over the web.

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7. Rate limiting protects an API from abuse by restricting the number of requests a client can make.

Explanation

Rate limiting is a crucial mechanism for APIs, designed to prevent excessive use or abuse by clients. By imposing a cap on the number of requests within a specific timeframe, it ensures fair usage, enhances performance, and safeguards server resources, ultimately maintaining the stability and reliability of the service.

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8. Which of the following are common API architectural patterns? (Select all that apply)

Explanation

Common API architectural patterns include REST, GraphQL, gRPC, and SOAP, each offering unique approaches to data exchange. REST uses standard HTTP methods, GraphQL allows clients to request specific data, gRPC supports high-performance communication with protocol buffers, and SOAP provides a protocol for exchanging structured information, making them widely adopted in various applications.

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9. What should an API response include to help clients understand and handle errors?

Explanation

An API response should include a status code, error message, and error code to provide clients with clear and actionable information about the error. The status code indicates the type of error, the error message offers a human-readable description, and the error code allows for programmatic handling, facilitating easier debugging and resolution.

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10. A stateless API means the server does not store client context between requests.

Explanation

A stateless API operates under the principle that each request from the client to the server must contain all the information needed to understand and process that request. This means the server does not retain any client-specific data or session information, ensuring scalability and simplicity in handling multiple requests.

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11. Which HTTP method is used to partially update a resource?

Explanation

PATCH is the HTTP method specifically designed for partial updates of a resource. Unlike PUT, which replaces the entire resource, PATCH allows clients to send only the changes they want to apply, making it more efficient for modifying specific fields without affecting the entire resource.

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12. API pagination helps manage large datasets by returning results in ____.

Explanation

API pagination allows large datasets to be divided into smaller, manageable chunks called pages. This approach improves performance and user experience by enabling clients to request only a subset of data at a time, reducing load times and minimizing server strain while still providing access to the entire dataset.

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13. Which status code indicates the client request was malformed or invalid?

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14. CORS (Cross-Origin Resource Sharing) allows APIs to restrict requests from specific domains.

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15. Which approach allows clients to request only the fields they need, reducing payload size?

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Which HTTP method is idempotent and safe, used to retrieve a resource...
What does REST stand for in API design?
Which status code indicates the server successfully created a new...
API versioning through the URL path (e.g., /v1/users) is preferred...
Which authentication method transmits credentials with every request...
In REST API design, a resource should be identified by a ____.
Rate limiting protects an API from abuse by restricting the number of...
Which of the following are common API architectural patterns? (Select...
What should an API response include to help clients understand and...
A stateless API means the server does not store client context between...
Which HTTP method is used to partially update a resource?
API pagination helps manage large datasets by returning results in...
Which status code indicates the client request was malformed or...
CORS (Cross-Origin Resource Sharing) allows APIs to restrict requests...
Which approach allows clients to request only the fields they need,...
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