a). The XML above lists four articles by four different authors. Your task is to generate a matrix similar to the one shown above. Each cell i, j should list the number of articles (say N) co-authored by the author in row i and the author is column j. You may output your results to the command line as a textual representation.

To Start the code : "npm start"

b). How would you design a test suite for the above application? You are not required to write any test cases but to describe your processes.

1. The xml is read and converted into a object.
   • Test case should be written to test the object formation. The following condition should be true. The number of articles object created ==== 'articles' found in the xml document.
2. New citations are created using the Articles Data.
   • All the article objects are converted into collection of articles and authors in citations
3. When new Articles are created, correspondingly new authors are created using the authors data.
4. When every article is created, the authors data is updated with all the co-authors data, that he has collaborated with.

c). The above XML format is very similar to the Medline dataset, which contains over 22 million records. What problems do you foresee in scaling the above solution to these numbers of records.

1. The xml document is read and stored in a object. It should be converted into a stream data.
2. The scaling and searching mechanism takes time in the O(1). So this should not be a issue.
3. The articles data is stored as a array, it can be converted into a hash map. So that retrieval mechanism becomes easier.