Ed Round( Given an interface with 3 methods AddEmployee(int empid, String department); updateEmployee(int empid, String department); Collection reportEmployees(String Department);

Question

Ed Round( Given an interface with 3 methods AddEmployee(int empid, String department);
updateEmployee(int empid, String department);
Collection<Integer> reportEmployees(String Department);

Anonymous · Accepted Answer

Initially i used Hashset to store Employee obj.
But it caused reportemployees method to have O(n).
Later i used HashMap to overcome it and modify it to O(1)

Anonymous · Answer

Companies are just taking the interviews, not for selection & interviewers here take interviews to show their contribution for company's growth & that's all is fake.

Anonymous · Answer

You needed to have 2 hashmaos.
1. Emp_id --> Employee Object map
2. Dept_Name --> List map

This way all the operations will in O(1)

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