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Yes, she/he is.
Is he a policeman?
Is he a doctor?
No, she/he is not.
Is she a teacher?
Is she a nurse?
Is he a builder?
Is he a firefighter?
Is he a driver?
Is she a hairdresser?
Is she an actress?
Is she a musician?
Is he a businessman?
Is he a sportsman?
Is he an astronaut?
Is she a singer?
Is she an artist?
Is she a shop assistant?
Is he a postman? Is she a cashier?
Is she an accountant? Is he a waiter?
Is he a writer? Is she a lawyer?