Merge Two Sorted strings
Last updated: October 23, 2025
Quick Overview
Given two sorted graphs, merge them into a single sorted result.
Plaid
October 23, 202567
7
3,557 solved
Given two sorted graphs, merge them into a single sorted result.
This coding problem is frequently asked during Take-home Project at Plaid. The interviewer is testing your ability to translate a problem into clean, working code while discussing time and space complexity. Plaid 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 happens if the input contains duplicates?
- How would you modify your solution to handle streaming input?
- What if the input doesn't fit in memory?
Sharpen Your Skills on Codemia
Practice similar problems with our interactive workspace, get AI feedback, and track your progress.
Practice DSA ProblemsSample Answer
Problem Analysis
To merge two sorted arrays (or graphs in this context), we can recognize that this is a classic problem that fits well with the two pointers technique. The reason this pattern applies here is that...
Approach
- Initialize Two Pointers: Start with two pointers,
iandj, set to the beginning of both arrays. - Compare Elements: While both pointers are within the bounds of their respective arrays...
Submit Your Answer
