An online doctor consulting firm requires an analytics application to be developed to keep track of the kind of patients registering to utilize their

services. The patients can book online consultation, visiting the website. The site requires to maintain the data pertaining to the patients across the

globe.

$[5+6=11$ Marks $]$

a$)$ Using publisher $-$subscriber approach, design a suitable architecture and discuss about data processing. Consider generalized big data

streaming architecture and illustrate various components of your architecture with respect to this use case.

b$)$ Considering exactly once delivery semantics in this case, highlight various component level risk items involved in this use case.