Free Microsoft Dynamics MB-820 Actual Exam Questions - Question 6 Discussion

I think B is the no-brainer since you need the HTTPClient to actually make the API call. For the parsing part, D feels right because POS APIs typically return JSON, and you gotta convert that JSON into usable data structures. The other options don’t seem to handle both sending the request and properly processing the JSON response like B and D do. So, it’s about covering both sending and receiving data correctly with those two.

I’d say B and D too. Without HTTPClient, no API call, and since POS APIs usually return JSON, parsing it like in D makes sense. The other options don’t seem to fit the typical API reading flow.

Option B fits because it has the HTTPClient initialization, which is needed to call POS APIs. Also, option D looks right since parsing JSON into records is necessary to process the response data properly in codeunit.

I’d rule out anything that doesn’t involve HTTPClient since POS APIs generally work over HTTP. Also, the code needs to handle the response, so options about reading streams or parsing JSON are probably necessary. The first step has to be creating and initializing the HTTPClient, then making the request. Anything missing that setup won’t work. Options mentioning things like “HttpWebRequest” or unrelated classes seem outdated or irrelevant here. This is all about connecting through the right client and processing the response properly.

I’m thinking the key here is making sure the codeunit actually sets up the connection to the POS terminal API correctly. So options involving initializing an HTTPClient object and then sending a GET or POST request make sense. The parts about deserializing JSON responses also have to be in there because the API usually returns data in JSON format. Anything mentioning file handling or database tables probably isn’t right since it’s about API calls, not local storage.

I’d pick the options that mention the right methods for calling external APIs (like HTTPClient) and handling JSON since POS terminals usually use web APIs. Anything about direct SQL or local files seems off here.

Does the question specify which version of Business Central or the POS terminal API we’re working with? The methods and permissions can differ between versions, so knowing that might affect which options to select in the codeunit. Also, is there any mention of the authentication method needed for the API calls? That could be a key detail missing from the snippet shown.