Transform string to hash map
Last updated: July 27, 2025
Quick Overview
Convert the given string to sorted result following the specified rules.
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Coding & Algorithms
Software Engineer
Software Engineer
Take-home Project
Coding & Algorithms
Easy
9
11
115 solved
Convert the given string to sorted result following the specified rules.
Coding interviews at LinkedIn 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
- Identify the correct data structure and algorithm for the problem
- Write clean, bug-free code with proper variable naming
- Analyze time and space complexity correctly
- Handle basic edge cases (empty input, single element)
- Communicate your thought process while coding
Key Topics to Cover
Tree structures and recursion
Edge cases and input validation
Binary search and divide and conquer
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
- What is the worst-case input for your solution?
- How would you modify your solution to handle streaming input?
- Can you optimize the space complexity of your solution?
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Practice DSA ProblemsSample Answer
Problem Analysis
To transform the given string into a hash map with sorted results, we need to identify the frequency of each character in the string and then sort these characters based on their frequencies. This pro...
Approach
- Count Frequencies: Loop through each character in the string and maintain a count of each character using a dictionary.
- Example: For the input string 'banana', the frequency dictionary wou...
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