Right Side View of Binary Tree in DSA Javascript - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the Right Side View of a binary tree?

It is the list of nodes visible when looking at the tree from the right side, showing the rightmost node at each level.

beginner

Which traversal method is commonly used to get the right side view of a binary tree?

Level order traversal (Breadth-First Search) is used, visiting nodes level by level and recording the last node at each level.

beginner

In the right side view algorithm, why do we record the last node at each level?

Because the last node visited at each level is the rightmost node visible from the right side.

intermediate

What data structure helps to implement the right side view using level order traversal?

A queue is used to keep track of nodes at each level during the traversal.

intermediate

How does the recursive approach for right side view differ from the iterative approach?

The recursive approach uses depth-first search prioritizing the right child first, recording the first node visited at each depth, while iterative uses BFS and records the last node at each level.

What does the right side view of a binary tree show?

A The rightmost nodes at each level

B The root node only

C All leaf nodes

D The leftmost nodes at each level

The right side view shows the rightmost nodes visible from the right side at each level.

Which data structure is typically used in the iterative method to find the right side view?

A Stack

B Set

C Queue

D Map

A queue is used for level order traversal (BFS) to process nodes level by level.

In a recursive right side view approach, which child is visited first?

A Left child

B Right child

C Both children simultaneously

D No children

The right child is visited first to ensure the rightmost node at each depth is recorded first.

What is the time complexity of the right side view algorithm using BFS?

A O(n)

B O(log n)

C O(n^2)

D O(1)

Each node is visited once, so the time complexity is O(n), where n is the number of nodes.

If a binary tree has only left children, what will the right side view look like?

A Only leaf nodes

B Empty list

C Only the root node

D All nodes in the tree

Since there are no right children, the left nodes are visible from the right side, so all nodes appear in the right side view.

Explain how to find the right side view of a binary tree using level order traversal.

Think about visiting nodes level by level and picking the rightmost node.

Describe the difference between iterative and recursive approaches to get the right side view of a binary tree.

Consider traversal order and how nodes are recorded.