Trace code and find frequent character

Q: Trace code and find frequent character

This question evaluates proficiency in algorithm tracing and debugging loop-and-conditional logic (including off-by-one detection), analysis of time and space complexity, and string-processing skills such as frequency counting with case-insensitivity and lexicographic tie-breaking.

Q: How do I approach Coding & Algorithms interview questions?

Coding & Algorithms questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master coding & algorithms interviews.

Question

Trace a simple algorithm: Given a short loop-and-conditional pseudo-code operating over an integer array, trace the values of key variables (e.g., index, current element, running best, counters) after each iteration for a provided input and state the final result. Also identify the time and space complexity and any off-by-one errors.
String frequency: Given a string of letters (case-insensitive), return the character that appears most frequently; if there is a tie, return the lexicographically smallest among them. Provide an O(n) approach and discuss space trade-offs.

Trace code and find frequent character

Overview

Comments (0)