Transform array to hash map
Last updated: December 8, 2025
Quick Overview
Convert the given array to sorted result following the specified rules.
Workday
Coding & Algorithms
Machine Learning Engineer
Workday
December 8, 2025Machine Learning Engineer
Onsite
Coding & Algorithms
Medium
39
12
997 solved
Convert the given array to sorted result following the specified rules.
Workday uses this problem in the Onsite to evaluate your algorithmic thinking. They expect you to discuss multiple approaches, analyze trade-offs between them, and implement the optimal solution with clean, readable code.
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
Common algorithm patterns (sliding window, two pointers, BFS/DFS)
Data structure selection and trade-offs
Edge cases and input validation
Graph algorithms and traversal
Time and space complexity analysis
Binary search and divide and conquer
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
The problem requires us to transform a given array into a hash map based on specified rules. The transformation involves sorting the array first and then using the sorted values to populate the hash m...
Approach
- Input Validation: First, validate the input to ensure it is a non-empty array.
- Sorting: Sort the array in ascending order.
- Hash Map Creation: Initialize an empty dictionary. Itera...
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