Can you name some open source cloud computing platform databases?
By asking this question, the interviewer is testing your knowledge of open source cloud databases and trying to learn if you are familiar with and can offer options to your customers. The best way to answer this question is to name the databases you have knowledge of and recommending which one is best for your customer's requirements.
"There are three main open source cloud computing databases. They are Couch, Lucid and Mongo. These differ from proprietary databases based on there being no licenses required to use them and the ability of the IT community to make revisions in them to improve their performance. Of these, I believe (insert the name of the one you recommend here) is best suited for most client's needs. Not only does it have the features they require, but they won't have to pay any licensing fees, and they can upgrade it at any time."
