Question
Which of the following HTTP methods is idempotent and is
primarily used to update a specific resource's data on a server?Solution
The HTTP PUT method is considered idempotent, meaning that making the same request multiple times will have the same effect as making it once. This characteristic makes PUT suitable for updating a specific resource or creating it if it does not exist. For example, when updating a user’s profile data, using PUT ensures that multiple requests with the same data will not create multiple resources; instead, it will consistently update the resource. An idempotent operation is crucial in network communication as it allows developers to retry requests in case of network failures without worrying about creating duplicate or inconsistent states. PUT is generally paired with a resource identifier (like /user/123) in RESTful APIs, making it straightforward for clients and servers to handle resource updates predictably. Option A (GET) - The GET method is idempotent but used only for retrieving resources, not modifying or updating them. Option B (POST) - POST is not idempotent and is mainly used for creating new resources or submitting data to the server, where repeated calls may result in multiple resource creations. Option D (DELETE) - DELETE is idempotent but is used to remove resources, not update or create them. Option E (PATCH) - PATCH can be used for partial updates and is not strictly idempotent, as multiple PATCH requests with slightly different data can yield different results.
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