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String manipulation problems similar to First Letter Capitalization are common in technical interviews. They test understanding of character handling, edge cases, and efficient traversal of strings.
The optimal approach is a single-pass traversal of the string. While iterating through characters, detect the start of each word and convert that character to uppercase using built-in character operations.
In most implementations, no complex data structure is required. A simple string traversal with a boolean flag or condition to detect word boundaries is sufficient and keeps the solution efficient.
The standard solution runs in O(n) time where n is the length of the string. Each character is visited exactly once while checking for word boundaries and applying capitalization when needed.