In a binary tree, what is the maximum number of nodes at level k?
Practice Questions
Q1
In a binary tree, what is the maximum number of nodes at level k?
k
2^k
2^(k+1)
k^2
Questions & Step-by-Step Solutions
In a binary tree, what is the maximum number of nodes at level k?
Step 1: Understand what a binary tree is. A binary tree is a tree data structure where each node has at most two children.
Step 2: Identify what 'level k' means. The level of a node is defined by how far it is from the root node. The root node is at level 0, its children are at level 1, and so on.
Step 3: Recognize that at each level, each node can have two children. This means that the number of nodes can double at each level.
Step 4: Calculate the maximum number of nodes at level k. At level 0 (the root), there is 1 node (2^0 = 1). At level 1, there can be 2 nodes (2^1 = 2). At level 2, there can be 4 nodes (2^2 = 4), and so on.
Step 5: Generalize the pattern. The maximum number of nodes at level k is given by the formula 2^k.
