partitioning on Binary Tree
Last updated: March 12, 2026
Quick Overview
Perform a rotation on a binary tree and return the result.
Databricks
Coding & Algorithms
Software Engineer
Databricks
March 12, 2026Software Engineer
Technical Screen
Coding & Algorithms
Medium
150
5
4,114 solved
Perform a rotation on a binary tree and return the result.
Coding interviews at Databricks focus on problem-solving approach as much as the final solution. The interviewer wants to see you break down the problem, consider edge cases, and optimize iteratively. Communication throughout the process is key.
What the Interviewer Expects
- Recognize the underlying problem pattern (sliding window, two pointers, BFS/DFS, etc.)
- Discuss multiple approaches and trade-offs before coding
- Implement an optimal solution with clean, production-quality code
- Handle all edge cases including boundary conditions and invalid input
- Optimize both time and space complexity with clear justification
- Test your solution systematically with well-chosen examples
Key Topics to Cover
Tree structures and recursion
Data structure selection and trade-offs
Hash maps and frequency counting
Sorting and searching
How to Approach This
- Clarify input constraints and edge cases before writing code.
- Walk through your approach verbally and confirm with the interviewer before coding.
- Start with a brute force solution, then optimize. Mention time and space complexity.
- Test your solution with examples, including edge cases like empty input or duplicates.
- Consider common patterns: sliding window, two pointers, hash map, BFS/DFS, dynamic programming.
Possible Follow-up Questions
- Can you optimize the space complexity of your solution?
- Can you solve this in a single pass?
- What is the worst-case input for your solution?
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Practice DSA ProblemsSample Answer
Problem Analysis
The problem requires us to perform a rotation on a binary tree. This suggests that we need to manipulate the pointers of the tree nodes. The underlying pattern here is tree traversal and manipulation,...
Approach
- Identify the rotation type: Determine whether we are performing a left or right rotation. For example, a left rotation on a node means that the right child becomes the new root of that subtree,...
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