An Inner Helper Class, Such as a TreeNode Inside the Generic

question 13

Multiple Choice

An inner helper class, such as a TreeNode inside the generic BinaryTree class, must meet which of the following criteria?
I be public
II be private
III be declared as generic

• A) I and III
• B) II and III
• C) I, II and III
• D) none are necessary

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Definitions:

Ecological Pyramid

A graphical representation that shows the biomass or bio productivity at each trophic level in a given ecosystem.

Producer Trophic Level

The first level in a food web, comprised of organisms that produce organic materials (usually through photosynthesis) from inorganic substances.

Base

A substance that can accept hydrogen ions (protons) or more generally, donate a pair of valence electrons; in nucleic acids, a nitrogen-containing molecule that forms part of the genetic code.

Denitrifying Bacteria

Bacteria involved in the nitrogen cycle, converting nitrates in soil into nitrogen gas, thereby reducing nitrogen availability to plants.