What seems to be the problem? Are you having problems understanding what a doubly linked list is, or are you having problems with the class portion of the assignment? A double linked list is a linked list that can be traversed forwards and backwards. The class should be generic enough to handle any type of data structure passed to it, and include the basic functions of traverse forward and backwards, insert and delete.
You are not getting any responses to this request because it is a fundamental coding ability test. The Interviewer has asked you to do this as an assessment of YOUR coding abilities, not ours. I don't want to sound unkind, but you might take the fact that you are having problems with this as a hint that you might need a refresher course in Data Structures.
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