Round 1
Questions: Specific question not provided.
Follow-up Question
- How does using an array improve performance compared to a HashMap?
Candidate's Approach
The candidate explained that using an array instead of a HashMap for counting frequencies is beneficial when the range of possible keys is small and fixed. They illustrated the approach with examples for both characters and small numbers, demonstrating how to map characters to array indices using their ASCII values and how to increment counts directly in an array.
Interviewer's Feedback
No feedback provided.