Exam 70-486 topic 1 question 155 discussion

Actual exam question from Microsoft's 70-486

Question #: 155
Topic #: 1

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You develop an ASP.NET Core MVC web application. You have a legacy business system that sends data to the web application by using Web API. The legacy business system uses proprietary data formats.
You need to handle the proprietary data format.
Solution: Add a custom formatter class to the Web API and implement the IInputFormatter interface.
Does the solution meet the goal?

A. Yes
B. No

Show Suggested Answer

Suggested Answer: A 🗳️
References:
https://docs.microsoft.com/en-us/aspnet/core/web-api/advanced/custom-formatters?view=aspnetcore-2.1 https://www.c-sharpcorner.com/article/custom-formatters-in-asp-net-core-mvc-web-api/

by Aghie at Aug. 31, 2019, 5:38 p.m.

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zimzimzimma

Highly Voted 4 years, 11 months ago

"You develop an ASP.NET Core MVC web application. You have a legacy business system that sends data to the web application by using Web API. The legacy business system uses proprietary data formats." The legacy business system sends data TO the webapplication which you're developing, so the webapplication needs consume the INCOMING data. So you need to write an INPUTformatter, because it is INPUT.

upvoted 5 times

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aousos

Most Recent 5 years, 1 month ago

the answer is no : it says add a custom formatter to the WEB API ===> so it s output formatter if it says : add a formatter to MVC collection the it woud be input formatter. So it s an output for web api and an input for mvc collection . for this question the answer is no

upvoted 3 times

mr_

4 years, 11 months ago

For me there are two apps - legacy & our Web App (WebAPI). Legacy system sends data in proprietary format to our Web App, so for our Web App it is input (request to our API) that we have to deserialize, not output (not response from our Web App). I would go for InputFormatter, so answer is correct IMO.

upvoted 2 times

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Aghie

5 years, 9 months ago

"Create an output formatter class if you want to serialize data to send to the client." So its a No.

upvoted 4 times

Thanh_Nguyen

5 years, 5 months ago

Wrong, accordnig to https://www.c-sharpcorner.com/article/custom-formatters-in-asp-net-core-mvc-web-api/ - Create output formatter (if we require serializing the data to send to the client) - Create input formatter (if we require deserializing the data received from the client)

upvoted 11 times

rhysabray

5 years, 3 months ago

Yeah the given answer is correct, because the data is being received by our application we use the input formatter and and add instances of it to the inputFormatters collection in MvcOptions source --> https://docs.microsoft.com/en-us/aspnet/core/web-api/advanced/custom-formatters?view=aspnetcore-3.1

upvoted 6 times

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