Transform array to sorted array
Last updated: May 24, 2026
Quick Overview
Given an unsorted array of integers, write a function that transforms it into a sorted array in ascending order. The function should take the array as input and return a new array containing the same integers sorted. Ensure that your solution is efficient and can handle large input sizes.
TikTok
May 24, 2026114
8
517 solved
Given an unsorted array of integers, write a function that transforms it into a sorted array in ascending order. The function should take the array as input and return a new array containing the same integers sorted. Ensure that your solution is efficient and can handle large input sizes.
Coding interviews at TikTok 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
- Quickly identify the optimal approach and its theoretical basis
- Handle complex algorithm design with multiple interacting components
- Write concise, elegant code under time pressure
- Prove correctness of your approach and discuss alternative solutions
- Optimize beyond the obvious: discuss constant factor improvements
- Address follow-up variations and explain how the solution generalizes
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
- Can you optimize the space complexity of your solution?
- What if the input doesn't fit in memory?
- How would your solution change if the input was sorted?
- Can you solve this iteratively instead of recursively (or vice versa)?
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Practice DSA ProblemsSample Answer
Problem Analysis
To transform an unsorted array of integers into a sorted array, the problem requires an efficient sorting algorithm. The optimal approach for this problem is to use the Quick Sort algorithm due to...
Approach
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Create a Copy of the Input Array: Since we need to return a new sorted array, we start by creating a copy of the input array.
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Implement Quick Sort: We will define a recursive functio...
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