In a binary tree, the node that is directly above another node is called the _____ of that node.a)childb)leafc)parentd)sibling

In a binary tree, what is the term for nodes that share the same parent?A. RootB. Left ChildC. SiblingsD. Descendants

In a BST, if a node has no children, it is known as a ______.root nodeleaf nodeinternal nodesubnode

In a binary tree, certain null entries are replaced by special pointers which point to nodes higher in the tree for efficiency. These special pointers are called ________.

n a BST, if a node has no children, it is known as a ______.

What is a full binary tree?a) Each node has exactly zero or two childrenb) Each node has exactly two childrenc) All the leaves are at the same leveld) Each node has exactly one or two children