1. Check if a key k is present in every segment of size x in an array
Input : int[] arr= { 3, 5, 2, 4, 9, 3, 1, 7, 3, 11, 12, 3,}
k = 3
x = 4
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3. Write an SQL query to fetch the EmpIds that are present in EmployeeDetails but not in EmployeeSalary
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