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Questions and Answers
What does the getRoot() method return?
Which traversal method creates an enumeration that traverses the subtree rooted at a node in preorder?
What term describes a node that has no child nodes?
What information is provided by the getChildCount() method?
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When calling isNodeSibling(), what is returned if the nodes are siblings?
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What do you call the hierarchy from a node to its child nodes?
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What does the getParent() method return if a node has no parent?
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In a binary tree, what is the maximum number of child nodes any node can have?
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Which of the following correctly defines a parent-child relationship in a tree structure?
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Which method returns the previous sibling of a node?
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What is meant by the 'depth' of a tree?
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What type of enumeration does postorderEnumeration() create?
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What does the getNextSibling() method return?
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Which of the following is NOT a characteristic of subtrees?
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What are 'sibling nodes' in a tree structure?
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Which traversal method involves visiting all nodes in a specific order?
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Which traversal method visits nodes in the order of Left, Root, Right?
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What does the function 'isLeaf()' return?
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In Depth-First Traversal, which is the last node visited in Postorder?
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Which of the following best describes sibling nodes?
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In breadth-first traversal, how are nodes visited?
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Which traversal method starts with visiting the root node first?
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When performing Depth-First Traversal in Preorder, which direction is visited after the root node?
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Which statement about child nodes is correct?
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Study Notes
Tree Representation
- Trees are hierarchical structures, often used to represent file systems or organizational structures.
- Nodes: Represent individual elements within the tree.
- Root: The top node.
- Branch: The connection between a parent node and its children.
- Child Nodes: The successors of a node.
- Parent Node: The predecessor of a node.
- Binary tree: A tree with at most two child nodes per node.
- Leaf Node: A node without children.
- Internal Node: A node with at least one child.
- Subtree: A smaller tree within a larger tree.
- Level: The distance of a node from the root.
- Depth: The highest level of a tree.
- Degree: The number of children a node has.
Tree Traversal
- Visiting all nodes in the tree in a specific order.
- Preorder: Root is visited first, then left subtree, then right subtree.
- Postorder: Left subtree is visited first, then right subtree, then root.
- Inorder: Left subtree is visited first, then root, then right subtree.
- Breadth-First (Level Order): Nodes are visited level by level, starting from the root and proceeding to the left subtree, right subtree and so forth.
Other Tree Functionality
- getParent(): Returns the parent of a node.
- isNodeSibling(): Returns True if two nodes are siblings.
- getPreviousSibling(): Returns the previous sibling in the parent's children array.
- getNextSibling(): Returns the next sibling in the parent's children array.
- getSiblingCount(): Returns the number of siblings a node has.
- isLeaf(): Returns True if a node has no children.
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Description
This quiz covers the fundamentals of tree representation and traversal techniques in computer science. Learn about nodes, branches, binary trees, and various methods of visiting nodes, including preorder, postorder, and inorder traversal. Perfect for students studying data structures.
