InterviewDigestOA2026-08-11
Count repeated letters in a string
AI-Expanded — inferred from the question title, not from the original candidate report
Given a string, write a function that returns a dictionary or hash map containing each character that appears more than once as the key and its corresponding frequency count as the value. The function should be case-insensitive and ignore any non-alphabetic characters present in the input string.
Context & Summary
The assessment tested aptitude, electronics knowledge, and C programming proficiency.
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