Recall & Review
beginner
What is a long-running operation in the context of REST APIs?
A long-running operation is a task that takes a significant amount of time to complete, such as processing large data or complex computations, which cannot be handled instantly in a single API request-response cycle.
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beginner
Why do REST APIs use asynchronous responses for long-running operations?
Asynchronous responses allow the server to accept the request and immediately return a response without waiting for the operation to finish, improving user experience and server efficiency by avoiding timeouts and blocking.
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intermediate
What HTTP status code is commonly used to indicate that a long-running operation has started and is processing asynchronously?
HTTP status code 202 Accepted is used to indicate that the request has been accepted for processing, but the processing is not yet complete.
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intermediate
How does a client typically check the status of a long-running operation in an async REST API?
The server usually provides a URL in the response (often in the Location header) where the client can poll or check the status of the operation until it is complete.
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intermediate
What is a common pattern to handle long-running operations asynchronously in REST APIs?
The client sends a request, the server responds with 202 Accepted and a status URL, the client polls the status URL until the operation completes, then the server returns the final result or status.
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Which HTTP status code indicates a long-running operation has been accepted but not completed?
✗ Incorrect
202 Accepted means the request is accepted for processing but not finished yet.
What does a REST API usually provide to track a long-running operation?
✗ Incorrect
The server gives a URL where the client can check the operation status.
Why should clients avoid waiting synchronously for long-running operations?
✗ Incorrect
Waiting synchronously can cause timeouts and block resources.
What is the main benefit of asynchronous responses in REST APIs?
✗ Incorrect
Async responses help servers handle many requests without blocking.
Which method is commonly used by clients to get updates on a long-running operation?
✗ Incorrect
Clients poll the provided status URL to check progress.
Explain how asynchronous responses help manage long-running operations in REST APIs.
Think about how the server and client communicate without waiting.
You got /4 concepts.
Describe the typical workflow for a client interacting with a REST API that handles long-running operations asynchronously.
Focus on the steps from request to final result.
You got /4 concepts.