You are developing a .NET application that uses the HttpClient type to call an ASP.NET
Web API application. The API call returns a list of customers in JSON format and logs the
results.
The URI for the API call is in a variable named address. You need to make the API call
without blocking. Which code segment should you use?
A.
Option A
B.
Option B
C.
Option C
D.
Option D
Should be A
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agree
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agree
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A
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Please good people, explain or support your answers of choice every time. If you don’t, you leave us in the middle of the jungle.
Just a synopsis of why it is not the answer and/or why it is the answer.
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Everything from Task that has the .Result is synchronous operationand blocks the calling thread:
“Accessing the property’s get accessor blocks the calling thread until the asynchronous operation is complete; it is equivalent to calling the Wait method.”
https://msdn.microsoft.com/en-us/library/dd321468(v=vs.110).aspx
So B and C are wrong.
Still, I am unable to see any diference between A and D…
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Difference between A and D is in ReadAsAsync and ReadAsAsync.
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JsonArray vs JsonObject
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https://stackoverflow.com/questions/12289844/difference-between-jsonobject-and-jsonarray/52071979
Answer is A which returns List of Customers in JSON format.
Arrays in JSON are used to organize a collection of related items which could be JSON objects.
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Correct – A
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