The function below is used to search for an element in a binary tree that contains linked nodes.

function treeContains(treeNode : Node, element : int) : bool
  if (treeNode == NULL)
    return false
  else if (treeNode.getValue() == element)
    return true
    left : bool = treeContains(treeNode.getLeft(), element)
    right : bool = treeContains(treeNode.getRight(), element) 
    return left || right 
  end if
end function

What can be said about the treeContains function?

(Select all acceptable answers.)

The function can be rewritten as an iterative function.
If a node with a value equal to the element parameter exists in the right part of the tree, close to the initial treeNode (root), it will be found faster than if such node exists in the left part of the tree but further from the root.
If the tree doesn't contain a node whose value is equal to the element parameter, the function will always pass through all nodes in the tree.
The function is tail recursive.
For large trees, a stack overflow error/exception can happen.
If the tree contains a node whose value is equal to the element parameter, the function will always pass through all nodes in the tree.

Data Structures & Algorithms Recursion Tree Traversal New Public


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