What concept concerning queues does this demonstrate?

Given the diagram below:

A circular array as an implementation of a queue.

Computer Science & Information Technology

The ________ key on the keyboard accesses Help in Office 2013

Fill in the blank(s) with correct word

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Computer Science & Information Technology

A binary tree is also a(n) ____.

A. stack B. linked list C. graph D. array

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Computer Science & Information Technology