1 Rotation around the front-to-back axis is called roll. 2  Rotation around the side-to-side axis is called pitch. 3  Rotation around the vertical axis is called yaw.  The Ailerons Control Roll. On the outer rear edge of each wing, the two ailerons move in opposite directions, up and down, decreasing lift on one wing while increasing it on the other.
A System call is a mechanism used by an application for requesting a service from the operating system. Examples of the services provided by the operating system are allocation and deallocation of memory, reporting of current date and time etc.
The Internet is a WAN as the various computers are located at geographically different places and are connected by long distance network links. Chapter 2: Operating System Structure 1. What is the purpose of system calls? Answer: System calls allow user-level processes to request services of the operating system. 2. What are the five major activities of an operating system in regard to process management? Answer: 1. The creation and deletion of both user and system processes 2.