Left Side View of Binary Tree in DSA Typescript - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the Left Side View of a binary tree?

The left side view of a binary tree is the set of nodes visible when the tree is seen from the left side. It includes the leftmost node at each level of the tree.

beginner

Which tree traversal method is commonly used to find the left side view of a binary tree?

Level order traversal (Breadth-First Search) is commonly used. We visit nodes level by level and pick the first node at each level to form the left side view.

beginner

In the context of left side view, why do we pick the first node at each level during traversal?

Because the first node visited at each level from left to right is the leftmost node visible from the left side of the tree.

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What data structure helps to implement level order traversal efficiently for left side view?

A queue is used to hold nodes of each level in order. It helps process nodes level by level from left to right.

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How does the left side view differ from the right side view of a binary tree?

The left side view shows the leftmost nodes at each level, while the right side view shows the rightmost nodes at each level when viewed from the right side.

What node do we include in the left side view at each level?

A The first node visited at that level from left to right

B The last node visited at that level from left to right

C The root node only

D All nodes at that level

The left side view includes the first node visited at each level from left to right, which is the leftmost node.

Which data structure is best suited for level order traversal?

A Stack

B Hash Map

C Queue

D Linked List

A queue is used to process nodes level by level in order, which is essential for level order traversal.

If a binary tree has only one node, what is its left side view?

A Empty

B The root node

C All nodes except root

D None of the above

With only one node, the left side view is just the root node itself.

What traversal order is used to find the left side view?

A Level order

B Preorder

C Postorder

D Inorder

Level order traversal visits nodes level by level, which helps identify the leftmost node at each level.

How do you handle nodes at the same level when finding the left side view?

A Pick the rightmost node

B Pick the middle node

C Pick all nodes

D Pick the leftmost node

For the left side view, we pick the leftmost node at each level.

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

Think about how you see the tree from the left side and which nodes appear first at each level.

Describe the difference between left side view and right side view of a binary tree.

Imagine looking at the tree from the left side versus the right side.