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Exam 70-486 topic 1 question 38 discussion

Actual exam question from Microsoft's 70-486
Question #: 38
Topic #: 1
[All 70-486 Questions]

You are developing an ASP.NET MVC application that provides instant messaging capabilities to customers.
You have the following requirements:
✑ Messages must be able to be sent and received simultaneously.
✑ Latency and unnecessary header data must be eliminated.
✑ The application must comply with HTML5 standards.
You need to design the application to meet the requirements.
What should you do?

  • A. Configure polling from the browser.
  • B. Implement long-running HTTP requests.
  • C. Implement WebSockets protocol on the client and the server.
  • D. Instantiate a MessageChannel object on the client.
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Suggested Answer: D 🗳️
by daniel_lobo at Oct. 14, 2019, 9:35 p.m.

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daniel_lobo
Highly Voted 5 years, 6 months ago
Correct answer is C. D is for creating a message channel between an web page and an embedded iframe.
upvoted 21 times
Darshu
5 years, 3 months ago
how come D , correct?
upvoted 1 times
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Kayes
Highly Voted 5 years, 5 months ago
Yes, correct answer is C.
upvoted 19 times
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Leodolz
Most Recent 4 years, 4 months ago
Looks like it's D because it asks for communications between clients, for this requirement a Message Channel is more suitable as Web Sockets are more designed for Client-Server communications
upvoted 1 times
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slobex
4 years, 7 months ago
https://stackoverflow.com/questions/29620567/difference-between-messagechannel-and-websockets
upvoted 2 times
Abou_riyad
4 years, 5 months ago
Thank you, this is helpful
upvoted 1 times
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eggzamtaker
4 years, 7 months ago
Fail to see how it is D. C seems correct.
upvoted 2 times
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zozox
4 years, 9 months ago
D is correct in HTML5 - Web messaging feature
upvoted 2 times
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tanujgyan
5 years ago
Correct answer is C. Other dumps also talk about it and also this question was asked on stackoverflow
upvoted 3 times
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Paulo1
5 years ago
WebSockets is used to send data over network, usually between a browser and a server. Messaging API is used to send data between threads / processes within a single browser. Correct answer: C
upvoted 4 times
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SirRocko
5 years, 1 month ago
D - Socket used for Client/Server, Channel used for Client/Client
upvoted 2 times
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SibuAbraham
5 years, 1 month ago
What is the correct answer?
upvoted 2 times
sdGuru
5 years, 1 month ago
I would choose C. Maybe this will make it clear: WebSockets is used to send data over network, usually between a browser and a server. Messaging API is used to send data between threads / processes within a single browser.
upvoted 8 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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