Asystem call
? is an entry point into the kernelcode
? allows a program to request a kernelservice
? is a technique to protect i/o devicesand other system resources
? all of the these

Im doing this last minute and literally none of my neighbors or people that my dad works with use excel so if anyone could me make up an example

Who needs to approve a change before it is initiated? (select two.) -change board -client or end user -ceo -personnel manager -project manager

When early motion pictures played in movie theaters, they were often accompanied by live organ or piano music. which of the following are the most likely reasons that this happened? (select all that apply). the music was provided to distract audience members from the loud sounds made when filmstrips were changed. the music accompanied the movies because the movies were silent and audiences were used to hearing music during plays in theaters. the music usually was played before, and sometimes after the movie, as an alternative form of entertainment. the music viewers to interpret the dramatic action in the films.