Exam 200-901 topic 1 question 80 discussion

B is not correct Synchronous API calls are blocking calls that do not return until either the change has been completed or there has been an error. For asynchronous calls, the response to the API call is returned immediately with a polling URL while the request continues to be processed. In heavier load conditions, it can be more efficient to submit multiple async calls and periodically check the status than to wait for each call to complete before submitting the next one.

Definitely B

I defer to the top comment

Option D is right.

I'm going with D. Synchronous calls have to wait for the response. Asynchronous calls are just "subscriptions" which receive a callback later on, once the data is retrieved. Hence other calls can be made in the meantime. Option B states "immediately" which can be interpreted multiple ways, it's not stated that it means "the requested data are returned immediately". Asynchronous APIs do respond immediately, not with the requested data but with a "taskID" or similar info.

Correct answer

correct answer

Async call will give you the callback URL immediately, while a sync call won't respond until it's done doing whatever you told it to do.

This is another terribly written question. When considering answer B, is it talking about the actual data we're looking for or just a response in general? If it's talking about the actual data we want, then synchronous would be faster. If it's talking about any response at all, then async would be faster as it gets the callback now so you can fetch the data later. So if we're going strictly on the face value of the wording of the question without inferring anything else, answer D would make more sense.

In general, a synchronous API call is a request made by a client that waits for a response before moving on to the next task. The client is blocked or "stuck" until it receives a response from the server. This means that the client is unable to perform any other actions or processes until it receives the response. On the other hand, an asynchronous API call is a request made by a client that does not wait for a response before moving on to the next task. The client is able to continue performing other actions or processes while it waits for a response from the server. This means that the client is able to handle multiple requests simultaneously, rather than having to wait for one request to be completed before moving on to the next. The other options are not accurate. A synchronous or asynchronous API call may or may not require authentication, and there is no inherent difference in the offline capabilities or the number of calls that can be made in a specified time period between the two types of API calls.

Synchronous API calls are blocking calls that do not return until either the change has been completed or there has been an error Asynchronous the response to the API call is returned immediately with a polling URL while the request continues to be processed https://developer.cisco.com/docs/packaged-contact-center/#!synchronous-vs-asynchronous-writes/synchronous-vs-asynchronous-writes

https://developer.cisco.com/docs/packaged-contact-center/#!synchronous-vs-asynchronous-writes/synchronous-vs-asynchronous-writes

B is correct Netacad 4.2.2 Benefits of a synchronous API design Synchronous APIs enable the application to receive data immediately. If the API is designed correctly, the application will have better performance because everything happens quickly. However, if it is not designed correctly, the API request will be a bottleneck because the application has to wait for the response. When are APIs asynchronous? APIs are usually designed to be asynchronous when the request is an action that takes some time for the server to process, or if the data is not readily available. For example, if the server has to make a request to a remote service to fetch the data, it cannot guarantee that it will receive the data immediately to send back to the client. Just because an API is asynchronous does not necessarily mean that the client will not get the data immediately. It only means that an immediate response with data is not guaranteed.

I go for D because the others dont make sense

D is correct: https://developer.cisco.com/docs/packaged-contact-center/#!synchronous-vs-asynchronous-writes/synchronous-vs-asynchronous-writes

D is correct

In the case of synchronous APIs, the expectation is that there will be an immediate return of data. The application requests data and waits for it until a value is returned. In the case of asynchronous APIs, the availability of a resource, service or data store may not be immediate. These APIs may provide a callback to the requester when the requested resource is ready. B) DEFINITELY