Implement Stack with streaming input
Last updated: February 23, 2026
Quick Overview
Implement a Union Find data structure that supports get and put operations in O(1) time.
Netflix
February 23, 2026100
10
3,681 solved
Implement a Union Find data structure that supports get and put operations in O(1) time.
This coding problem is frequently asked during Technical Screen at Netflix. The interviewer is testing your ability to translate a problem into clean, working code while discussing time and space complexity. Netflix expects candidates to write production-quality code, not just solve the puzzle.
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
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
- What is the worst-case input for your solution?
- What happens if the input contains duplicates?
- Can you optimize the space complexity of your solution?
- How would you test this solution thoroughly?
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