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Questions and Answers
What is the primary difference between the PUT and PATCH methods?
Which HTTP method is used to permanently remove a resource from the database?
Which HTTP methods are considered safe methods?
Which statement about idempotent HTTP methods is true?
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What happens to fields not included in a PUT request's body?
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What is the main characteristic of HTTP that distinguishes it from other protocols?
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What HTTP method would you use to create a new resource in a REST API?
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Which HTTP method is used to replace an existing resource with an updated version?
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When sending a GET request to an endpoint, which of the following is typically true?
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REST emphasizes which of the following principles for its interactions between clients and servers?
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Study Notes
HTTP Overview
- Hypertext Transfer Protocol (HTTP) is the primary protocol for data transmission on the internet, handling pages, images, and videos.
- Operates on a request-response model where clients request data from servers, which in turn respond accordingly.
- Stateless protocol: Each request is independent, without server memory of previous interactions.
REST and HTTP
- Representational State Transfer (REST) is a widely used architectural style for web services and APIs.
- REST emphasizes stateless interactions and standardization, focusing on resources accessed via unique API endpoints.
- HTTP methods serve as the foundation for actions in REST APIs, enabling clients to interact with resources effectively.
Common HTTP Methods
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GET:
- Retrieves data from a server.
- Accesses all or specific resources (e.g., /products for all products, /products/123 for product with ID 123).
- Typically does not include a request body.
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POST:
- Creates new resources, sending data in the request body.
- Example: A POST request to /products might include product details like name, color, and price.
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PUT:
- Replaces an existing resource entirely with the provided data.
- If fields are missing in the request body, they are deleted from the resource.
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PATCH:
- Updates specific properties of an existing resource without affecting other fields.
- More efficient than PUT for changes that involve only partial updates.
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DELETE:
- Removes a specified resource from the server.
- Requires appropriate permissions, especially for sensitive operations.
SAFE and IDEMPOTENT HTTP Methods
- Safe Methods: Facilitate read-only operations without altering resources; primarily GET and HEAD.
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Idempotent Methods: Return the same outcome regardless of execution frequency; includes all safe methods, PUT, and DELETE.
- POST is not idempotent as it creates new resources with each call.
- PATCH can be idempotent but can vary based on its specific implementation, such as increments.
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Description
This quiz covers the fundamentals of Hypertext Transfer Protocol (HTTP) and its role in web services, specifically focusing on REST architectural style. Understand the stateless nature of HTTP, its request-response model, and the common methods used for data transmission. Test your knowledge on how these protocols interact to facilitate web communication.
