Right Side View of Binary Tree in DSA Go - 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. For each level, only the rightmost node is seen.

intermediate

How can we find the right side view of a binary tree using level order traversal?

Traverse the tree level by level (breadth-first). For each level, record the last node visited. These nodes form the right side view.

beginner

In Go, which data structure is commonly used to implement level order traversal for the right side view?

A queue is used to hold nodes of each level. Nodes are dequeued and their children enqueued to process level by level.

beginner

Why do we only keep the last node at each level for the right side view?

Because the last node at each level is the rightmost node visible from the right side. Nodes before it are hidden behind.

intermediate

What is the time complexity of finding the right side view of a binary tree using BFS?

The time complexity is O(n), where n is the number of nodes, because each node is visited once.

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

A All nodes at the deepest level

B Nodes visible from the left side, one per level

C All leaf nodes

D Nodes visible from the right side, one per level

The right side view shows the rightmost node at each level, visible when looking from the right.

Which traversal method is best suited to find the right side view of a binary tree?

A Preorder traversal

B Level order traversal (BFS)

C Inorder traversal

D Postorder traversal

Level order traversal processes nodes level by level, making it easy to pick the rightmost node at each level.

In Go, which data structure helps to perform level order traversal?

A Queue

B Map

C Stack

D Slice without order

A queue allows FIFO processing needed for level order traversal.

If a binary tree has 10 nodes, what is the time complexity to find its right side view using BFS?

A O(n)

B O(log n)

C O(1)

D O(n^2)

Each node is visited once, so time complexity is linear, O(n).

What node do we record at each level to form the right side view?

A First node at the level

B Middle node at the level

C Last node at the level

D All nodes at the level

The last node at each level is the rightmost and visible from the right side.

Explain how to find the right side view of a binary tree using a queue in Go.

Think about visiting nodes one level at a time and picking the rightmost node.

Describe why the right side view only includes one node per level and which node that is.

Imagine standing on the right side and looking at the tree.