How do apps and devices call the os?

There’s only one game mode that stars with the letter ‘e’ in cs: go. which of the options below is it?

If you're using an existing powerpoint presentation that will receive new slides based on a word outline, select the a. slide that will appear after the new slides. b. first slide in the presentation. c. slide that will appear before the new slides. d. last slide in the presentation.

Anetwork security application that prevents access between a private and trusted network and other untrusted networks