Learning objective
Simple tree-traversal algorithms: Be able to trace the tree-traversal algorithms: • pre-order • post-order • in-order. Be able to describe uses of tree-traversal algorithms. Pre-Order: copying a tree. In-Order: binary search tree, outputting the contents of a binary search tree in ascending order. Post-Order: Infix to RPN (Reverse Polish Notation) conversions, producing a postfix expression from an expression tree, emptying a tree.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
0
Flashcards
0
Questions
Topic
Tree-traversal
Subtopic
Simple tree-traversal algorithms
Study support
Understand this objective
Quick explanation
Simple tree-traversal algorithms: Be able to trace the tree-traversal algorithms: • pre-order • post-order • in-order. Be able to describe uses of tree-traversal algorithms. Pre-Order: copying a tree. In-Order: binary search tree, outputting the contents of a binary search tree in ascending order. Post-Order: Infix to RPN (Reverse Polish Notation) conversions, producing a postfix expression from an expression tree, emptying a tree
- This point belongs to Tree-traversal, especially Simple tree-traversal algorithms.
- You need to be able to simple tree-traversal algorithms: Be able to trace the tree-traversal algorithms: • pre-order • post-order • in-order. Be able to describe uses of tree-traversal algorithms. Pre-Order: copying a tree. In-Order: binary search tree, outputting the contents of a binary search tree in ascending order. Post-Order: Infix to RPN (Reverse Polish Notation) conversions, producing a postfix expression from an expression tree, emptying a tree.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Why it matters
This objective helps connect Simple tree-traversal algorithms to exam-style questions, flashcards, and revision notes for Tree-traversal.
Quick student answer
Consider this tree: M is the root; M has left child F and right child T; F has left child C and right child H; T has left child R and right child W. What is the pre-order traversal?
Direct answer
M, F, C, H, T, R, W
Key terms
- Tree traversal: A systematic process for visiting the nodes of a tree in a specified order, such as pre-order, in-order or post-order.
- Reverse Polish Notation (RPN): Postfix notation in which an operator is placed after the values or subexpressions to which it applies.
Common trap
Putting the root in the wrong position: Remember the three patterns: pre-order is current-left-right, in-order is left-current-right, and post-order is left-right-current.
Related questions
Try this as a practice card
Question 1 of 4
Choose an answer, get feedback, then move sideways through the set.
Flashcard prompts
Flip through the key recall cards
Flashcard 1 of 4
Revision tools