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This is a verified interview question from Uber. Candidates reporting seeing this problem in recent Online Assessments (OAs) and onsite rounds. Mastering "Complete Signal Block Detection" covers key patterns like Strings.
"Uber is testing a multi-port EV charging strip. Each port accepts one of five signal types: 'a', 'e', 'i', 'o', 'u' Given a string logSignals, count how many contiguous substrings: Contain only these five characters Contain all five characters at least once Return the total number of such substrings. Function Signature long countCompleteSignalBlocks(String logSignals) Example Input: logSignals = "aeioexaeaeiou" Output: 4 Explanation: Valid substrings: "aeaeiou" "aaeiou" "aeiou" "aeiou""
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