Amazon Interview Question for Software Engineer / Developers

Country: India
Interview Type: In-Person

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Not really sure how to build an architecture design, but when I build an app this is how I do.

First decide on how to store data. There will be 3 entities, doc, author & doc-author-mapping. Doc db table / class has two elements, title of doc & doc content. Author has name & email. doc-author-mapping will hold doc-id & author-id for many to many mapping.

The user flow will be as follows
1. User logs in
2. The user docs are displayed. This is fetched through table join of doc, author & doc-author-mapping where doc-id = id of logged in user.
3. On clicking of a doc (or new doc), the doc content is displayed. On save button hit, the doc content is saved.
4. Every key press is reported to the backend through a two way web socket implementation together with the x & y cordinate. The event should be broadcasted to all the other authors who are seeing the document & the document is updated. The event also updates the doc content in db.

This should be largely it.

- February 24, 2015 | Flag Reply

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