Answer: In object-oriented approach for the development of operating system requires stub and driver as essential part for the creation of proper interaction of the object oriented components with the external system.They help in testing of the module.
Stub is the unit that acts as a piece of code which fills in the place of the missing section in the system. The functions of the system module is tested by stub .
Driver is the part that helps in citing the system modules under the testing conditions.It is the piece of code that creates the calling function simulation.
