what is doctrine of respondeat superior.
Respondeat superior is the doctrine that states that an employer is responsible for an employee. More precisely, it states that a master is liable for torts of its servants committed in the course of their service. Respondeat superior is NOT exculpatory and does not eliminate ordinary negligence doctrine. Thus, the master remains liable for any negligence of its own that can be proved without use of respondeat superior: negligent hiring or supervision, for example.